From 40b1936efebdb9c31d9ed6fe59055f71ea366509 Mon Sep 17 00:00:00 2001 From: "Andrii.Tseglytskyi" Date: Thu, 2 May 2013 12:20:10 -0500 Subject: [PATCH 01/23] regulator: Introduce TI Adaptive Body Bias(ABB) on-chip LDO driver Adaptive Body Biasing (ABB) modulates transistor bias voltages dynamically in order to optimize switching speed versus leakage. Texas Instruments' SmartReflex 2 technology provides support for this power management technique with Forward Body Biasing (FBB) and Reverse Body Biasing (RBB). These modulate the body voltage of transistor cells or blocks dynamically to gain performance and reduce leakage. TI's SmartReflex white paper[1] has further information for usage in conjunction with other power management techniques. The application of FBB/RBB technique is determined for each unique device in some process nodes, whereas, they are mandated on other process nodes. In a nutshell, ABB technique is implemented on TI SoC as an on-chip LDO which has ABB module controlling the bias voltage. However, the voltage is unique per device. These vary per SoC family and the manner in which these techniques are used may vary depending on the Operating Performance Point (OPP) voltage targeted. For example: OMAP3630/OMAP4430: certain OPPs mandate usage of FBB independent of devices. OMAP4460/OMAP4470: certain OPPs mandate usage of FBB, while others may optionally use FBB or optimization with RBB. OMAP5: ALL OPPs may optionally use ABB, and ABB biasing voltage is influenced by vset fused in s/w and requiring s/w override of default values. Further, two generations of ABB module are used in various TI SoCs. They have remained mostly register field compatible, however the register offset had switched between versions. We introduce ABB LDO support in the form of a regulator which is controlled by voltages denoting the desired Operating Performance Point which is targeted. However, since ABB transition is part of OPP change sequence, the sequencing required to ensure sane operation w.r.t OPP change is left to the controlling driver (example: cpufreq SoC driver) using standard regulator operations. The driver supports all ABB modes and ability to override ABB LDO vset control efuse based ABB mode detection etc. Current implementation is heavily influenced by the original patch series [2][3] from Mike Turquette. However, the current implementation supports only device tree based information. [1] http://www.ti.com/pdfs/wtbu/smartreflex_whitepaper.pdf [2] http://marc.info/?l=linux-omap&m=134931341818379&w=2 [3] http://marc.info/?l=linux-arm-kernel&m=134931402406853&w=2 [nm@ti.com: co-developer] Signed-off-by: Nishanth Menon Signed-off-by: Andrii.Tseglytskyi Signed-off-by: Mark Brown --- .../bindings/regulator/ti-abb-regulator.txt | 128 +++ drivers/regulator/Kconfig | 10 + drivers/regulator/Makefile | 1 + drivers/regulator/ti-abb-regulator.c | 912 ++++++++++++++++++ 4 files changed, 1051 insertions(+) create mode 100644 Documentation/devicetree/bindings/regulator/ti-abb-regulator.txt create mode 100644 drivers/regulator/ti-abb-regulator.c diff --git a/Documentation/devicetree/bindings/regulator/ti-abb-regulator.txt b/Documentation/devicetree/bindings/regulator/ti-abb-regulator.txt new file mode 100644 index 000000000000..2e57a33e9029 --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/ti-abb-regulator.txt @@ -0,0 +1,128 @@ +Adaptive Body Bias(ABB) SoC internal LDO regulator for Texas Instruments SoCs + +Required Properties: +- compatible: Should be one of: + - "ti,abb-v1" for older SoCs like OMAP3 + - "ti,abb-v2" for newer SoCs like OMAP4, OMAP5 +- reg: Address and length of the register set for the device. It contains + the information of registers in the same order as described by reg-names +- reg-names: Should contain the reg names + - "base-address" - contains base address of ABB module + - "int-address" - contains address of interrupt register for ABB module + (also see Optional properties) +- #address-cell: should be 0 +- #size-cell: should be 0 +- clocks: should point to the clock node used by ABB module +- ti,settling-time: Settling time in uSecs from SoC documentation for ABB module + to settle down(target time for SR2_WTCNT_VALUE). +- ti,clock-cycles: SoC specific data about count of system ti,clock-cycles used for + computing settling time from SoC Documentation for ABB module(clock + cycles for SR2_WTCNT_VALUE). +- ti,tranxdone-status-mask: Mask to the int-register to write-to-clear mask + indicating LDO tranxdone (operation complete). +- ti,abb_info: An array of 6-tuples u32 items providing information about ABB + configuration needed per operational voltage of the device. + Each item consists of the following in the same order: + volt: voltage in uV - Only used to index ABB information. + ABB mode: one of the following: + 0-bypass + 1-Forward Body Bias(FBB) + 3-Reverse Body Bias(RBB) + efuse: (see Optional properties) + RBB enable efuse Mask: (See Optional properties) + FBB enable efuse Mask: (See Optional properties) + Vset value efuse Mask: (See Optional properties) + + NOTE: If more than 1 entry is present, then regulator is setup to change + voltage, allowing for various modes to be selected indexed off + the regulator. Further, ABB LDOs are considered always-on by + default. + +Optional Properties: +- reg-names: In addition to the required properties, the following are optional + - "efuse-address" - Contains efuse base address used to pick up ABB info. + - "ldo-address" - Contains address of ABB LDO overide register address. + "efuse-address" is required for this. +- ti,ldovbb-vset-mask - Required if ldo-address is set, mask for LDO override + register to provide override vset value. +- ti,ldovbb-override-mask - Required if ldo-address is set, mask for LDO + override register to enable override vset value. +- ti,abb_opp_sel: Addendum to the description in required properties + efuse: Mandatory if 'efuse-address' register is defined. Provides offset + from efuse-address to pick up ABB characteristics. Set to 0 if + 'efuse-address' is not defined. + RBB enable efuse Mask: Optional if 'efuse-address' register is defined. + 'ABB mode' is force set to RBB mode if value at "efuse-address" + + efuse maps to RBB mask. Set to 0 to ignore this. + FBB enable efuse Mask: Optional if 'efuse-address' register is defined. + 'ABB mode' is force set to FBB mode if value at "efuse-address" + + efuse maps to FBB mask (valid only if RBB mask does not match) + Set to 0 to ignore this. + Vset value efuse Mask: Mandatory if ldo-address is set. Picks up from + efuse the value to set in 'ti,ldovbb-vset-mask' at ldo-address. + +Example #1: Simplest configuration (no efuse data, hard coded ABB table): +abb_x: regulator-abb-x { + compatible = "ti,abb-v1"; + regulator-name = "abb_x"; + #address-cell = <0>; + #size-cells = <0>; + reg = <0x483072f0 0x8>, <0x48306818 0x4>; + reg-names = "base-address", "int-address"; + ti,tranxdone-status-mask = <0x4000000>; + clocks = <&sysclk>; + ti,settling-time = <30>; + ti,clock-cycles = <8>; + ti,abb_info = < + /* uV ABB efuse rbb_m fbb_m vset_m */ + 1012500 0 0 0 0 0 /* Bypass */ + 1200000 3 0 0 0 0 /* RBB mandatory */ + 1320000 1 0 0 0 0 /* FBB mandatory */ + >; +}; + +Example #2: Efuse bits contain ABB mode setting (no LDO override capability) +abb_y: regulator-abb-y { + compatible = "ti,abb-v2"; + regulator-name = "abb_y"; + #address-cell = <0>; + #size-cells = <0>; + reg = <0x4a307bd0 0x8>, <0x4a306014 0x4>, <0x4A002268 0x8>; + reg-names = "base-address", "int-address", "efuse-address"; + ti,tranxdone-status-mask = <0x4000000>; + clocks = <&sysclk>; + ti,settling-time = <50>; + ti,clock-cycles = <16>; + ti,abb_info = < + /* uV ABB efuse rbb_m fbb_m vset_m */ + 975000 0 0 0 0 0 /* Bypass */ + 1012500 0 0 0x40000 0 0 /* RBB optional */ + 1200000 0 0x4 0 0x40000 0 /* FBB optional */ + 1320000 1 0 0 0 0 /* FBB mandatory */ + >; +}; + +Example #3: Efuse bits contain ABB mode setting and LDO override capability +abb_z: regulator-abb-z { + compatible = "ti,abb-v2"; + regulator-name = "abb_z"; + #address-cell = <0>; + #size-cells = <0>; + reg = <0x4ae07ce4 0x8>, <0x4ae06010 0x4>, + <0x4a002194 0x8>, <0x4ae0C314 0x4>; + reg-names = "base-address", "int-address", + "efuse-address", "ldo-address"; + ti,tranxdone-status-mask = <0x8000000>; + /* LDOVBBMM_MUX_CTRL */ + ti,ldovbb-override-mask = <0x400>; + /* LDOVBBMM_VSET_OUT */ + ti,ldovbb-vset-mask = <0x1F>; + clocks = <&sysclk>; + ti,settling-time = <50>; + ti,clock-cycles = <16>; + ti,abb_info = < + /* uV ABB efuse rbb_m fbb_m vset_m */ + 975000 0 0 0 0 0 /* Bypass */ + 1200000 0 0x4 0 0x40000 0x1f00 /* FBB optional, vset */ + >; +}; diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 8bb26446037e..9296425103ef 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -472,6 +472,16 @@ config REGULATOR_TWL4030 This driver supports the voltage regulators provided by this family of companion chips. +config REGULATOR_TI_ABB + bool "TI Adaptive Body Bias on-chip LDO" + depends on ARCH_OMAP + help + Select this option to support Texas Instruments' on-chip Adaptive Body + Bias (ABB) LDO regulators. It is recommended that this option be + enabled on required TI SoC. Certain Operating Performance Points + on TI SoCs may be unstable without enabling this as it provides + device specific optimized bias to allow/optimize functionality. + config REGULATOR_VEXPRESS tristate "Versatile Express regulators" depends on VEXPRESS_CONFIG diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 47a34ff88f98..95350e890973 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -63,6 +63,7 @@ obj-$(CONFIG_REGULATOR_TPS65910) += tps65910-regulator.o obj-$(CONFIG_REGULATOR_TPS65912) += tps65912-regulator.o obj-$(CONFIG_REGULATOR_TPS80031) += tps80031-regulator.o obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o +obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o obj-$(CONFIG_REGULATOR_VEXPRESS) += vexpress.o obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o obj-$(CONFIG_REGULATOR_WM831X) += wm831x-isink.o diff --git a/drivers/regulator/ti-abb-regulator.c b/drivers/regulator/ti-abb-regulator.c new file mode 100644 index 000000000000..c1870ea64939 --- /dev/null +++ b/drivers/regulator/ti-abb-regulator.c @@ -0,0 +1,912 @@ +/* + * Texas Instruments SoC Adaptive Body Bias(ABB) Regulator + * + * Copyright (C) 2011 Texas Instruments, Inc. + * Mike Turquette + * + * Copyright (C) 2012-2013 Texas Instruments, Inc. + * Andrii Tseglytskyi + * Nishanth Menon + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * ABB LDO operating states: + * NOMINAL_OPP: bypasses the ABB LDO + * FAST_OPP: sets ABB LDO to Forward Body-Bias + * SLOW_OPP: sets ABB LDO to Reverse Body-Bias + */ +#define TI_ABB_NOMINAL_OPP 0 +#define TI_ABB_FAST_OPP 1 +#define TI_ABB_SLOW_OPP 3 + +/** + * struct ti_abb_info - ABB information per voltage setting + * @opp_sel: one of TI_ABB macro + * @vset: (optional) vset value that LDOVBB needs to be overriden with. + * + * Array of per voltage entries organized in the same order as regulator_desc's + * volt_table list. (selector is used to index from this array) + */ +struct ti_abb_info { + u32 opp_sel; + u32 vset; +}; + +/** + * struct ti_abb_reg - Register description for ABB block + * @setup_reg: setup register offset from base + * @control_reg: control register offset from base + * @sr2_wtcnt_value_mask: setup register- sr2_wtcnt_value mask + * @fbb_sel_mask: setup register- FBB sel mask + * @rbb_sel_mask: setup register- RBB sel mask + * @sr2_en_mask: setup register- enable mask + * @opp_change_mask: control register - mask to trigger LDOVBB change + * @opp_sel_mask: control register - mask for mode to operate + */ +struct ti_abb_reg { + u32 setup_reg; + u32 control_reg; + + /* Setup register fields */ + u32 sr2_wtcnt_value_mask; + u32 fbb_sel_mask; + u32 rbb_sel_mask; + u32 sr2_en_mask; + + /* Control register fields */ + u32 opp_change_mask; + u32 opp_sel_mask; +}; + +/** + * struct ti_abb - ABB instance data + * @rdesc: regulator descriptor + * @clk: clock(usually sysclk) supplying ABB block + * @base: base address of ABB block + * @int_base: interrupt register base address + * @efuse_base: (optional) efuse base address for ABB modes + * @ldo_base: (optional) LDOVBB vset override base address + * @regs: pointer to struct ti_abb_reg for ABB block + * @txdone_mask: mask on int_base for tranxdone interrupt + * @ldovbb_override_mask: mask to ldo_base for overriding default LDO VBB + * vset with value from efuse + * @ldovbb_vset_mask: mask to ldo_base for providing the VSET override + * @info: array to per voltage ABB configuration + * @current_info_idx: current index to info + * @settling_time: SoC specific settling time for LDO VBB + */ +struct ti_abb { + struct regulator_desc rdesc; + struct clk *clk; + void __iomem *base; + void __iomem *int_base; + void __iomem *efuse_base; + void __iomem *ldo_base; + + const struct ti_abb_reg *regs; + u32 txdone_mask; + u32 ldovbb_override_mask; + u32 ldovbb_vset_mask; + + struct ti_abb_info *info; + int current_info_idx; + + u32 settling_time; +}; + +/** + * ti_abb_rmw() - handy wrapper to set specific register bits + * @mask: mask for register field + * @value: value shifted to mask location and written + * @offset: offset of register + * @base: base address + * + * Return: final register value (may be unused) + */ +static inline u32 ti_abb_rmw(u32 mask, u32 value, u32 offset, + void __iomem *base) +{ + u32 val; + + val = readl(base + offset); + val &= ~mask; + val |= (value << __ffs(mask)) & mask; + writel(val, base + offset); + + return val; +} + +/** + * ti_abb_check_txdone() - handy wrapper to check ABB tranxdone status + * @abb: pointer to the abb instance + * + * Return: true or false + */ +static inline bool ti_abb_check_txdone(const struct ti_abb *abb) +{ + return !!(readl(abb->int_base) & abb->txdone_mask); +} + +/** + * ti_abb_clear_txdone() - handy wrapper to clear ABB tranxdone status + * @abb: pointer to the abb instance + */ +static inline void ti_abb_clear_txdone(const struct ti_abb *abb) +{ + writel(abb->txdone_mask, abb->int_base); +}; + +/** + * ti_abb_wait_tranx() - waits for ABB tranxdone event + * @dev: device + * @abb: pointer to the abb instance + * + * Return: 0 on success or -ETIMEDOUT if the event is not cleared on time. + */ +static int ti_abb_wait_txdone(struct device *dev, struct ti_abb *abb) +{ + int timeout = 0; + bool status; + + while (timeout++ <= abb->settling_time) { + status = ti_abb_check_txdone(abb); + if (status) + break; + + udelay(1); + } + + if (timeout > abb->settling_time) { + dev_warn_ratelimited(dev, + "%s:TRANXDONE timeout(%duS) int=0x%08x\n", + __func__, timeout, readl(abb->int_base)); + return -ETIMEDOUT; + } + + return 0; +} + +/** + * ti_abb_clear_all_txdone() - clears ABB tranxdone event + * @dev: device + * @abb: pointer to the abb instance + * + * Return: 0 on success or -ETIMEDOUT if the event is not cleared on time. + */ +static int ti_abb_clear_all_txdone(struct device *dev, const struct ti_abb *abb) +{ + int timeout = 0; + bool status; + + while (timeout++ <= abb->settling_time) { + ti_abb_clear_txdone(abb); + + status = ti_abb_check_txdone(abb); + if (!status) + break; + + udelay(1); + } + + if (timeout > abb->settling_time) { + dev_warn_ratelimited(dev, + "%s:TRANXDONE timeout(%duS) int=0x%08x\n", + __func__, timeout, readl(abb->int_base)); + return -ETIMEDOUT; + } + + return 0; +} + +/** + * ti_abb_program_ldovbb() - program LDOVBB register for override value + * @dev: device + * @abb: pointer to the abb instance + * @info: ABB info to program + */ +static void ti_abb_program_ldovbb(struct device *dev, const struct ti_abb *abb, + struct ti_abb_info *info) +{ + u32 val; + + val = readl(abb->ldo_base); + /* clear up previous values */ + val &= ~(abb->ldovbb_override_mask | abb->ldovbb_vset_mask); + + switch (info->opp_sel) { + case TI_ABB_SLOW_OPP: + case TI_ABB_FAST_OPP: + val |= abb->ldovbb_override_mask; + val |= info->vset << __ffs(abb->ldovbb_vset_mask); + break; + } + + writel(val, abb->ldo_base); +} + +/** + * ti_abb_set_opp() - Setup ABB and LDO VBB for required bias + * @rdev: regulator device + * @abb: pointer to the abb instance + * @info: ABB info to program + * + * Return: 0 on success or appropriate error value when fails + */ +static int ti_abb_set_opp(struct regulator_dev *rdev, struct ti_abb *abb, + struct ti_abb_info *info) +{ + const struct ti_abb_reg *regs = abb->regs; + struct device *dev = &rdev->dev; + int ret; + + ret = ti_abb_clear_all_txdone(dev, abb); + if (ret) + goto out; + + ti_abb_rmw(regs->fbb_sel_mask | regs->rbb_sel_mask, 0, regs->setup_reg, + abb->base); + + switch (info->opp_sel) { + case TI_ABB_SLOW_OPP: + ti_abb_rmw(regs->rbb_sel_mask, 1, regs->setup_reg, abb->base); + break; + case TI_ABB_FAST_OPP: + ti_abb_rmw(regs->fbb_sel_mask, 1, regs->setup_reg, abb->base); + break; + } + + /* program next state of ABB ldo */ + ti_abb_rmw(regs->opp_sel_mask, info->opp_sel, regs->control_reg, + abb->base); + + /* program LDO VBB vset override if needed */ + if (abb->ldo_base) + ti_abb_program_ldovbb(dev, abb, info); + + /* Initiate ABB ldo change */ + ti_abb_rmw(regs->opp_change_mask, 1, regs->control_reg, abb->base); + + /* Wait for ABB LDO to complete transition to new Bias setting */ + ret = ti_abb_wait_txdone(dev, abb); + if (ret) + goto out; + + ret = ti_abb_clear_all_txdone(dev, abb); + if (ret) + goto out; + +out: + return ret; +} + +/** + * ti_abb_set_voltage_sel() - regulator accessor function to set ABB LDO + * @rdev: regulator device + * @sel: selector to index into required ABB LDO settings (maps to + * regulator descriptor's volt_table) + * + * Return: 0 on success or appropriate error value when fails + */ +static int ti_abb_set_voltage_sel(struct regulator_dev *rdev, unsigned sel) +{ + const struct regulator_desc *desc = rdev->desc; + struct ti_abb *abb = rdev_get_drvdata(rdev); + struct device *dev = &rdev->dev; + struct ti_abb_info *info, *oinfo; + int ret = 0; + + if (!abb) { + dev_err_ratelimited(dev, "%s: No regulator drvdata\n", + __func__); + return -ENODEV; + } + + if (!desc->n_voltages || !abb->info) { + dev_err_ratelimited(dev, + "%s: No valid voltage table entries?\n", + __func__); + return -EINVAL; + } + + if (sel >= desc->n_voltages) { + dev_err(dev, "%s: sel idx(%d) >= n_voltages(%d)\n", __func__, + sel, desc->n_voltages); + return -EINVAL; + } + + /* If we are in the same index as we were, nothing to do here! */ + if (sel == abb->current_info_idx) { + dev_dbg(dev, "%s: Already at sel=%d\n", __func__, sel); + return ret; + } + + /* If data is exactly the same, then just update index, no change */ + info = &abb->info[sel]; + oinfo = &abb->info[abb->current_info_idx]; + if (!memcmp(info, oinfo, sizeof(*info))) { + dev_dbg(dev, "%s: Same data new idx=%d, old idx=%d\n", __func__, + sel, abb->current_info_idx); + goto out; + } + + ret = ti_abb_set_opp(rdev, abb, info); + +out: + if (!ret) + abb->current_info_idx = sel; + else + dev_err_ratelimited(dev, + "%s: Volt[%d] idx[%d] mode[%d] Fail(%d)\n", + __func__, desc->volt_table[sel], sel, + info->opp_sel, ret); + return ret; +} + +/** + * ti_abb_get_voltage_sel() - Regulator accessor to get current ABB LDO setting + * @rdev: regulator device + * + * Return: 0 on success or appropriate error value when fails + */ +static int ti_abb_get_voltage_sel(struct regulator_dev *rdev) +{ + const struct regulator_desc *desc = rdev->desc; + struct ti_abb *abb = rdev_get_drvdata(rdev); + struct device *dev = &rdev->dev; + + if (!abb) { + dev_err_ratelimited(dev, "%s: No regulator drvdata\n", + __func__); + return -ENODEV; + } + + if (!desc->n_voltages || !abb->info) { + dev_err_ratelimited(dev, + "%s: No valid voltage table entries?\n", + __func__); + return -EINVAL; + } + + if (abb->current_info_idx > (int)desc->n_voltages) { + dev_err(dev, "%s: Corrupted data? idx(%d) > n_voltages(%d)\n", + __func__, abb->current_info_idx, desc->n_voltages); + return -EINVAL; + } + + return abb->current_info_idx; +} + +/** + * ti_abb_init_timings() - setup ABB clock timing for the current platform + * @dev: device + * @abb: pointer to the abb instance + * + * Return: 0 if timing is updated, else returns error result. + */ +static int ti_abb_init_timings(struct device *dev, struct ti_abb *abb) +{ + u32 clock_cycles; + u32 clk_rate, sr2_wt_cnt_val, cycle_rate; + const struct ti_abb_reg *regs = abb->regs; + int ret; + char *pname = "ti,settling-time"; + + /* read device tree properties */ + ret = of_property_read_u32(dev->of_node, pname, &abb->settling_time); + if (ret) { + dev_err(dev, "Unable to get property '%s'(%d)\n", pname, ret); + return ret; + } + + /* ABB LDO cannot be settle in 0 time */ + if (!abb->settling_time) { + dev_err(dev, "Invalid property:'%s' set as 0!\n", pname); + return -EINVAL; + } + + pname = "ti,clock-cycles"; + ret = of_property_read_u32(dev->of_node, pname, &clock_cycles); + if (ret) { + dev_err(dev, "Unable to get property '%s'(%d)\n", pname, ret); + return ret; + } + /* ABB LDO cannot be settle in 0 clock cycles */ + if (!clock_cycles) { + dev_err(dev, "Invalid property:'%s' set as 0!\n", pname); + return -EINVAL; + } + + abb->clk = devm_clk_get(dev, NULL); + if (IS_ERR(abb->clk)) { + ret = PTR_ERR(abb->clk); + dev_err(dev, "%s: Unable to get clk(%d)\n", __func__, ret); + return ret; + } + + /* + * SR2_WTCNT_VALUE is the settling time for the ABB ldo after a + * transition and must be programmed with the correct time at boot. + * The value programmed into the register is the number of SYS_CLK + * clock cycles that match a given wall time profiled for the ldo. + * This value depends on: + * settling time of ldo in micro-seconds (varies per OMAP family) + * # of clock cycles per SYS_CLK period (varies per OMAP family) + * the SYS_CLK frequency in MHz (varies per board) + * The formula is: + * + * ldo settling time (in micro-seconds) + * SR2_WTCNT_VALUE = ------------------------------------------ + * (# system clock cycles) * (sys_clk period) + * + * Put another way: + * + * SR2_WTCNT_VALUE = settling time / (# SYS_CLK cycles / SYS_CLK rate)) + * + * To avoid dividing by zero multiply both "# clock cycles" and + * "settling time" by 10 such that the final result is the one we want. + */ + + /* Convert SYS_CLK rate to MHz & prevent divide by zero */ + clk_rate = DIV_ROUND_CLOSEST(clk_get_rate(abb->clk), 1000000); + + /* Calculate cycle rate */ + cycle_rate = DIV_ROUND_CLOSEST(clock_cycles * 10, clk_rate); + + /* Calulate SR2_WTCNT_VALUE */ + sr2_wt_cnt_val = DIV_ROUND_CLOSEST(abb->settling_time * 10, cycle_rate); + + dev_dbg(dev, "%s: Clk_rate=%ld, sr2_cnt=0x%08x\n", __func__, + clk_get_rate(abb->clk), sr2_wt_cnt_val); + + ti_abb_rmw(regs->sr2_wtcnt_value_mask, sr2_wt_cnt_val, regs->setup_reg, + abb->base); + + return 0; +} + +/** + * ti_abb_init_table() - Initialize ABB table from device tree + * @dev: device + * @abb: pointer to the abb instance + * @rinit_data: regulator initdata + * + * Return: 0 on success or appropriate error value when fails + */ +static int ti_abb_init_table(struct device *dev, struct ti_abb *abb, + struct regulator_init_data *rinit_data) +{ + struct ti_abb_info *info; + const struct property *prop; + const __be32 *abb_info; + const u32 num_values = 6; + char *pname = "ti,abb_info"; + u32 num_entries, i; + unsigned int *volt_table; + int min_uV = INT_MAX, max_uV = 0; + struct regulation_constraints *c = &rinit_data->constraints; + + prop = of_find_property(dev->of_node, pname, NULL); + if (!prop) { + dev_err(dev, "No '%s' property?\n", pname); + return -ENODEV; + } + + if (!prop->value) { + dev_err(dev, "Empty '%s' property?\n", pname); + return -ENODATA; + } + + /* + * Each abb_info is a set of n-tuple, where n is num_values, consisting + * of voltage and a set of detection logic for ABB information for that + * voltage to apply. + */ + num_entries = prop->length / sizeof(u32); + if (!num_entries || (num_entries % num_values)) { + dev_err(dev, "All '%s' list entries need %d vals\n", pname, + num_values); + return -EINVAL; + } + num_entries /= num_values; + + info = devm_kzalloc(dev, sizeof(*info) * num_entries, GFP_KERNEL); + if (!info) { + dev_err(dev, "Can't allocate info table for '%s' property\n", + pname); + return -ENOMEM; + } + abb->info = info; + + volt_table = devm_kzalloc(dev, sizeof(unsigned int) * num_entries, + GFP_KERNEL); + if (!volt_table) { + dev_err(dev, "Can't allocate voltage table for '%s' property\n", + pname); + return -ENOMEM; + } + + abb->rdesc.n_voltages = num_entries; + abb->rdesc.volt_table = volt_table; + /* We do not know where the OPP voltage is at the moment */ + abb->current_info_idx = -EINVAL; + + abb_info = prop->value; + for (i = 0; i < num_entries; i++, info++, volt_table++) { + u32 efuse_offset, rbb_mask, fbb_mask, vset_mask; + u32 efuse_val; + + /* NOTE: num_values should equal to entries picked up here */ + *volt_table = be32_to_cpup(abb_info++); + info->opp_sel = be32_to_cpup(abb_info++); + efuse_offset = be32_to_cpup(abb_info++); + rbb_mask = be32_to_cpup(abb_info++); + fbb_mask = be32_to_cpup(abb_info++); + vset_mask = be32_to_cpup(abb_info++); + + dev_dbg(dev, + "[%d]v=%d ABB=%d ef=0x%x rbb=0x%x fbb=0x%x vset=0x%x\n", + i, *volt_table, info->opp_sel, efuse_offset, rbb_mask, + fbb_mask, vset_mask); + + /* Find min/max for voltage set */ + if (min_uV > *volt_table) + min_uV = *volt_table; + if (max_uV < *volt_table) + max_uV = *volt_table; + + if (!abb->efuse_base) { + /* Ignore invalid data, but warn to help cleanup */ + if (efuse_offset || rbb_mask || fbb_mask || vset_mask) + dev_err(dev, "prop '%s': v=%d,bad efuse/mask\n", + pname, *volt_table); + goto check_abb; + } + + efuse_val = readl(abb->efuse_base + efuse_offset); + + /* Use ABB recommendation from Efuse */ + if (efuse_val & rbb_mask) + info->opp_sel = TI_ABB_SLOW_OPP; + else if (efuse_val & fbb_mask) + info->opp_sel = TI_ABB_FAST_OPP; + else if (rbb_mask || fbb_mask) + info->opp_sel = TI_ABB_NOMINAL_OPP; + + dev_dbg(dev, + "[%d]v=%d efusev=0x%x final ABB=%d\n", + i, *volt_table, efuse_val, info->opp_sel); + + /* Use recommended Vset bits from Efuse */ + if (!abb->ldo_base) { + if (vset_mask) + dev_err(dev, "prop'%s':v=%d vst=%x LDO base?\n", + pname, *volt_table, vset_mask); + continue; + } + info->vset = efuse_val & vset_mask >> __ffs(vset_mask); + dev_dbg(dev, "[%d]v=%d vset=%x\n", i, *volt_table, info->vset); +check_abb: + switch (info->opp_sel) { + case TI_ABB_NOMINAL_OPP: + case TI_ABB_FAST_OPP: + case TI_ABB_SLOW_OPP: + /* Valid values */ + break; + default: + dev_err(dev, "%s:[%d]v=%d, ABB=%d is invalid! Abort!\n", + __func__, i, *volt_table, info->opp_sel); + return -EINVAL; + } + } + + /* Setup the min/max voltage constraints from the supported list */ + c->min_uV = min_uV; + c->max_uV = max_uV; + + return 0; +} + +static struct regulator_ops ti_abb_reg_ops = { + .list_voltage = regulator_list_voltage_table, + + .set_voltage_sel = ti_abb_set_voltage_sel, + .get_voltage_sel = ti_abb_get_voltage_sel, +}; + +/* Default ABB block offsets, IF this changes in future, create new one */ +static const struct ti_abb_reg abb_regs_v1 = { + /* WARNING: registers are wrongly documented in TRM */ + .setup_reg = 0x04, + .control_reg = 0x00, + + .sr2_wtcnt_value_mask = (0xff << 8), + .fbb_sel_mask = (0x01 << 2), + .rbb_sel_mask = (0x01 << 1), + .sr2_en_mask = (0x01 << 0), + + .opp_change_mask = (0x01 << 2), + .opp_sel_mask = (0x03 << 0), +}; + +static const struct ti_abb_reg abb_regs_v2 = { + .setup_reg = 0x00, + .control_reg = 0x04, + + .sr2_wtcnt_value_mask = (0xff << 8), + .fbb_sel_mask = (0x01 << 2), + .rbb_sel_mask = (0x01 << 1), + .sr2_en_mask = (0x01 << 0), + + .opp_change_mask = (0x01 << 2), + .opp_sel_mask = (0x03 << 0), +}; + +static const struct of_device_id ti_abb_of_match[] = { + {.compatible = "ti,abb-v1", .data = &abb_regs_v1}, + {.compatible = "ti,abb-v2", .data = &abb_regs_v2}, + { }, +}; + +MODULE_DEVICE_TABLE(of, ti_abb_of_match); + +/** + * ti_abb_probe() - Initialize an ABB ldo instance + * @pdev: ABB platform device + * + * Initializes an individual ABB LDO for required Body-Bias. ABB is used to + * addional bias supply to SoC modules for power savings or mandatory stability + * configuration at certain Operating Performance Points(OPPs). + * + * Return: 0 on success or appropriate error value when fails + */ +static int ti_abb_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + const struct of_device_id *match; + struct resource *res; + struct ti_abb *abb; + struct regulator_init_data *initdata = NULL; + struct regulator_dev *rdev = NULL; + struct regulator_desc *desc; + struct regulation_constraints *c; + struct regulator_config config = { }; + char *pname; + int ret = 0; + + match = of_match_device(ti_abb_of_match, dev); + if (!match) { + /* We do not expect this to happen */ + ret = -ENODEV; + dev_err(dev, "%s: Unable to match device\n", __func__); + goto err; + } + if (!match->data) { + ret = -EINVAL; + dev_err(dev, "%s: Bad data in match\n", __func__); + goto err; + } + + abb = devm_kzalloc(dev, sizeof(struct ti_abb), GFP_KERNEL); + if (!abb) { + dev_err(dev, "%s: Unable to allocate ABB struct\n", __func__); + ret = -ENOMEM; + goto err; + } + abb->regs = match->data; + + /* Map ABB resources */ + pname = "base-address"; + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname); + if (!res) { + dev_err(dev, "Missing '%s' IO resource\n", pname); + ret = -ENODEV; + goto err; + } + abb->base = devm_request_and_ioremap(dev, res); + if (!abb->base) { + dev_err(dev, "Unable to map '%s'\n", pname); + ret = -ENOMEM; + goto err; + } + + pname = "int-address"; + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname); + if (!res) { + dev_err(dev, "Missing '%s' IO resource\n", pname); + ret = -ENODEV; + goto err; + } + /* + * We may have shared interrupt register offsets which are + * write-1-to-clear between domains ensuring exclusivity. + */ + abb->int_base = devm_ioremap_nocache(dev, res->start, + resource_size(res)); + if (!abb->int_base) { + dev_err(dev, "Unable to map '%s'\n", pname); + ret = -ENOMEM; + goto err; + } + + /* Map Optional resources */ + pname = "efuse-address"; + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname); + if (!res) { + dev_dbg(dev, "Missing '%s' IO resource\n", pname); + ret = -ENODEV; + goto skip_opt; + } + + /* + * We may have shared efuse register offsets which are read-only + * between domains + */ + abb->efuse_base = devm_ioremap_nocache(dev, res->start, + resource_size(res)); + if (!abb->efuse_base) { + dev_err(dev, "Unable to map '%s'\n", pname); + ret = -ENOMEM; + goto err; + } + + pname = "ldo-address"; + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname); + if (!res) { + dev_dbg(dev, "Missing '%s' IO resource\n", pname); + ret = -ENODEV; + goto skip_opt; + } + abb->ldo_base = devm_request_and_ioremap(dev, res); + if (!abb->ldo_base) { + dev_err(dev, "Unable to map '%s'\n", pname); + ret = -ENOMEM; + goto err; + } + + /* IF ldo_base is set, the following are mandatory */ + pname = "ti,ldovbb-override-mask"; + ret = + of_property_read_u32(pdev->dev.of_node, pname, + &abb->ldovbb_override_mask); + if (ret) { + dev_err(dev, "Missing '%s' (%d)\n", pname, ret); + goto err; + } + if (!abb->ldovbb_override_mask) { + dev_err(dev, "Invalid property:'%s' set as 0!\n", pname); + ret = -EINVAL; + goto err; + } + + pname = "ti,ldovbb-vset-mask"; + ret = + of_property_read_u32(pdev->dev.of_node, pname, + &abb->ldovbb_vset_mask); + if (ret) { + dev_err(dev, "Missing '%s' (%d)\n", pname, ret); + goto err; + } + if (!abb->ldovbb_vset_mask) { + dev_err(dev, "Invalid property:'%s' set as 0!\n", pname); + ret = -EINVAL; + goto err; + } + +skip_opt: + pname = "ti,tranxdone-status-mask"; + ret = + of_property_read_u32(pdev->dev.of_node, pname, + &abb->txdone_mask); + if (ret) { + dev_err(dev, "Missing '%s' (%d)\n", pname, ret); + goto err; + } + if (!abb->txdone_mask) { + dev_err(dev, "Invalid property:'%s' set as 0!\n", pname); + ret = -EINVAL; + goto err; + } + + initdata = of_get_regulator_init_data(dev, pdev->dev.of_node); + if (!initdata) { + ret = -ENOMEM; + dev_err(dev, "%s: Unable to alloc regulator init data\n", + __func__); + goto err; + } + + /* init ABB opp_sel table */ + ret = ti_abb_init_table(dev, abb, initdata); + if (ret) + goto err; + + /* init ABB timing */ + ret = ti_abb_init_timings(dev, abb); + if (ret) + goto err; + + desc = &abb->rdesc; + desc->name = dev_name(dev); + desc->owner = THIS_MODULE; + desc->type = REGULATOR_VOLTAGE; + desc->ops = &ti_abb_reg_ops; + + c = &initdata->constraints; + if (desc->n_voltages > 1) + c->valid_ops_mask |= REGULATOR_CHANGE_VOLTAGE; + c->always_on = true; + + config.dev = dev; + config.init_data = initdata; + config.driver_data = abb; + config.of_node = pdev->dev.of_node; + + rdev = regulator_register(desc, &config); + if (IS_ERR(rdev)) { + ret = PTR_ERR(rdev); + dev_err(dev, "%s: failed to register regulator(%d)\n", + __func__, ret); + goto err; + } + platform_set_drvdata(pdev, rdev); + + /* Enable the ldo if not already done by bootloader */ + ti_abb_rmw(abb->regs->sr2_en_mask, 1, abb->regs->setup_reg, abb->base); + + return 0; + +err: + dev_err(dev, "%s: Failed to initialize(%d)\n", __func__, ret); + return ret; +} + +/** + * ti_abb_remove() - cleanups + * @pdev: ABB platform device + * + * Return: 0 + */ +static int ti_abb_remove(struct platform_device *pdev) +{ + struct regulator_dev *rdev = platform_get_drvdata(pdev); + + regulator_unregister(rdev); + return 0; +} + +MODULE_ALIAS("platform:ti_abb"); + +static struct platform_driver ti_abb_driver = { + .probe = ti_abb_probe, + .remove = ti_abb_remove, + .driver = { + .name = "ti_abb", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(ti_abb_of_match), + }, +}; +module_platform_driver(ti_abb_driver); + +MODULE_DESCRIPTION("Texas Instruments ABB LDO regulator driver"); +MODULE_AUTHOR("Texas Instruments Inc."); +MODULE_LICENSE("GPL v2"); From f5cd8de2ce32e25e399f1d49d4876bf9450163a2 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Sat, 4 May 2013 22:02:27 +0800 Subject: [PATCH 02/23] regulator: ti-abb: Fix off-by-one valid range checking for abb->current_info_idx abb->current_info_idx is used as array subscript to access volt_table, thus the valid value range should be 0 ... desc->n_voltages - 1. Signed-off-by: Axel Lin Acked-by: Nishanth Menon Signed-off-by: Mark Brown --- drivers/regulator/ti-abb-regulator.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/regulator/ti-abb-regulator.c b/drivers/regulator/ti-abb-regulator.c index c1870ea64939..870d209ec866 100644 --- a/drivers/regulator/ti-abb-regulator.c +++ b/drivers/regulator/ti-abb-regulator.c @@ -387,8 +387,8 @@ static int ti_abb_get_voltage_sel(struct regulator_dev *rdev) return -EINVAL; } - if (abb->current_info_idx > (int)desc->n_voltages) { - dev_err(dev, "%s: Corrupted data? idx(%d) > n_voltages(%d)\n", + if (abb->current_info_idx >= (int)desc->n_voltages) { + dev_err(dev, "%s: Corrupted data? idx(%d) >= n_voltages(%d)\n", __func__, abb->current_info_idx, desc->n_voltages); return -EINVAL; } From 405c54009c85cf03d459f5880744b0d4ebb892e4 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Fri, 3 May 2013 20:46:10 +0800 Subject: [PATCH 03/23] regulator: Remove all platform_set_drvdata(pdev, NULL) in drivers Since 0998d06310 "device-core: Ensure drvdata = NULL when no driver is bound", this is done by driver core after device_release or on probe failure. Thus we can remove all platform_set_drvdata(pdev, NULL) in drivers. Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/regulator/88pm8607.c | 1 - drivers/regulator/lp8788-buck.c | 1 - drivers/regulator/lp8788-ldo.c | 2 -- drivers/regulator/max8925-regulator.c | 1 - drivers/regulator/mc13783-regulator.c | 2 -- drivers/regulator/mc13892-regulator.c | 2 -- drivers/regulator/pcap-regulator.c | 1 - drivers/regulator/pcf50633-regulator.c | 1 - drivers/regulator/tps65217-regulator.c | 2 -- drivers/regulator/virtual.c | 2 -- drivers/regulator/wm831x-dcdc.c | 7 ------- drivers/regulator/wm831x-isink.c | 2 -- drivers/regulator/wm831x-ldo.c | 2 -- drivers/regulator/wm8400-regulator.c | 1 - drivers/regulator/wm8994-regulator.c | 2 -- 15 files changed, 29 deletions(-) diff --git a/drivers/regulator/88pm8607.c b/drivers/regulator/88pm8607.c index 493948a38fca..8a7cb1f43046 100644 --- a/drivers/regulator/88pm8607.c +++ b/drivers/regulator/88pm8607.c @@ -406,7 +406,6 @@ static int pm8607_regulator_remove(struct platform_device *pdev) { struct pm8607_regulator_info *info = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); regulator_unregister(info->regulator); return 0; } diff --git a/drivers/regulator/lp8788-buck.c b/drivers/regulator/lp8788-buck.c index eb1e1e88ae51..0b015f2a7fd9 100644 --- a/drivers/regulator/lp8788-buck.c +++ b/drivers/regulator/lp8788-buck.c @@ -533,7 +533,6 @@ static int lp8788_buck_remove(struct platform_device *pdev) { struct lp8788_buck *buck = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); regulator_unregister(buck->regulator); return 0; diff --git a/drivers/regulator/lp8788-ldo.c b/drivers/regulator/lp8788-ldo.c index 0ce2c4c194b3..0527d87c6dd5 100644 --- a/drivers/regulator/lp8788-ldo.c +++ b/drivers/regulator/lp8788-ldo.c @@ -561,7 +561,6 @@ static int lp8788_dldo_remove(struct platform_device *pdev) { struct lp8788_ldo *ldo = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); regulator_unregister(ldo->regulator); return 0; @@ -622,7 +621,6 @@ static int lp8788_aldo_remove(struct platform_device *pdev) { struct lp8788_ldo *ldo = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); regulator_unregister(ldo->regulator); return 0; diff --git a/drivers/regulator/max8925-regulator.c b/drivers/regulator/max8925-regulator.c index 3597da8f0dca..e6d54a546d36 100644 --- a/drivers/regulator/max8925-regulator.c +++ b/drivers/regulator/max8925-regulator.c @@ -327,7 +327,6 @@ static int max8925_regulator_remove(struct platform_device *pdev) { struct regulator_dev *rdev = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); regulator_unregister(rdev); return 0; diff --git a/drivers/regulator/mc13783-regulator.c b/drivers/regulator/mc13783-regulator.c index fdf7f0a09090..5ff99d2703db 100644 --- a/drivers/regulator/mc13783-regulator.c +++ b/drivers/regulator/mc13783-regulator.c @@ -466,8 +466,6 @@ static int mc13783_regulator_remove(struct platform_device *pdev) struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev); int i; - platform_set_drvdata(pdev, NULL); - for (i = 0; i < priv->num_regulators; i++) regulator_unregister(priv->regulators[i]); diff --git a/drivers/regulator/mc13892-regulator.c b/drivers/regulator/mc13892-regulator.c index b716283a8760..1037e07937cf 100644 --- a/drivers/regulator/mc13892-regulator.c +++ b/drivers/regulator/mc13892-regulator.c @@ -636,8 +636,6 @@ static int mc13892_regulator_remove(struct platform_device *pdev) struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev); int i; - platform_set_drvdata(pdev, NULL); - for (i = 0; i < priv->num_regulators; i++) regulator_unregister(priv->regulators[i]); diff --git a/drivers/regulator/pcap-regulator.c b/drivers/regulator/pcap-regulator.c index 4899342f1fc1..1a73a297fe73 100644 --- a/drivers/regulator/pcap-regulator.c +++ b/drivers/regulator/pcap-regulator.c @@ -260,7 +260,6 @@ static int pcap_regulator_remove(struct platform_device *pdev) struct regulator_dev *rdev = platform_get_drvdata(pdev); regulator_unregister(rdev); - platform_set_drvdata(pdev, NULL); return 0; } diff --git a/drivers/regulator/pcf50633-regulator.c b/drivers/regulator/pcf50633-regulator.c index 534075e13d6d..54df9f7cb504 100644 --- a/drivers/regulator/pcf50633-regulator.c +++ b/drivers/regulator/pcf50633-regulator.c @@ -106,7 +106,6 @@ static int pcf50633_regulator_remove(struct platform_device *pdev) { struct regulator_dev *rdev = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); regulator_unregister(rdev); return 0; diff --git a/drivers/regulator/tps65217-regulator.c b/drivers/regulator/tps65217-regulator.c index df395187c063..2df4616621f5 100644 --- a/drivers/regulator/tps65217-regulator.c +++ b/drivers/regulator/tps65217-regulator.c @@ -405,8 +405,6 @@ static int tps65217_regulator_remove(struct platform_device *pdev) for (i = 0; i < TPS65217_NUM_REGULATOR; i++) regulator_unregister(tps->rdev[i]); - platform_set_drvdata(pdev, NULL); - return 0; } diff --git a/drivers/regulator/virtual.c b/drivers/regulator/virtual.c index 01c66e9712a4..a9d4284ea007 100644 --- a/drivers/regulator/virtual.c +++ b/drivers/regulator/virtual.c @@ -330,8 +330,6 @@ static int regulator_virtual_remove(struct platform_device *pdev) if (drvdata->enabled) regulator_disable(drvdata->regulator); - platform_set_drvdata(pdev, NULL); - return 0; } diff --git a/drivers/regulator/wm831x-dcdc.c b/drivers/regulator/wm831x-dcdc.c index 0af6898bcd79..46938cf162ad 100644 --- a/drivers/regulator/wm831x-dcdc.c +++ b/drivers/regulator/wm831x-dcdc.c @@ -567,8 +567,6 @@ static int wm831x_buckv_remove(struct platform_device *pdev) struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); struct wm831x *wm831x = dcdc->wm831x; - platform_set_drvdata(pdev, NULL); - free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "HC")), dcdc); free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")), @@ -714,8 +712,6 @@ static int wm831x_buckp_remove(struct platform_device *pdev) { struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); - free_irq(wm831x_irq(dcdc->wm831x, platform_get_irq_byname(pdev, "UV")), dcdc); regulator_unregister(dcdc->regulator); @@ -849,8 +845,6 @@ static int wm831x_boostp_remove(struct platform_device *pdev) { struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); - free_irq(wm831x_irq(dcdc->wm831x, platform_get_irq_byname(pdev, "UV")), dcdc); regulator_unregister(dcdc->regulator); @@ -940,7 +934,6 @@ static int wm831x_epe_remove(struct platform_device *pdev) { struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); regulator_unregister(dcdc->regulator); return 0; diff --git a/drivers/regulator/wm831x-isink.c b/drivers/regulator/wm831x-isink.c index 68586ee3e1cb..16ebdf94d0a0 100644 --- a/drivers/regulator/wm831x-isink.c +++ b/drivers/regulator/wm831x-isink.c @@ -225,8 +225,6 @@ static int wm831x_isink_remove(struct platform_device *pdev) { struct wm831x_isink *isink = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); - free_irq(wm831x_irq(isink->wm831x, platform_get_irq(pdev, 0)), isink); regulator_unregister(isink->regulator); diff --git a/drivers/regulator/wm831x-ldo.c b/drivers/regulator/wm831x-ldo.c index 1ec379a9a95c..9ff883f80878 100644 --- a/drivers/regulator/wm831x-ldo.c +++ b/drivers/regulator/wm831x-ldo.c @@ -338,8 +338,6 @@ static int wm831x_gp_ldo_remove(struct platform_device *pdev) { struct wm831x_ldo *ldo = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); - free_irq(wm831x_irq(ldo->wm831x, platform_get_irq_byname(pdev, "UV")), ldo); regulator_unregister(ldo->regulator); diff --git a/drivers/regulator/wm8400-regulator.c b/drivers/regulator/wm8400-regulator.c index c6a32ea80b9d..a09f03ee5506 100644 --- a/drivers/regulator/wm8400-regulator.c +++ b/drivers/regulator/wm8400-regulator.c @@ -250,7 +250,6 @@ static int wm8400_regulator_remove(struct platform_device *pdev) { struct regulator_dev *rdev = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); regulator_unregister(rdev); return 0; diff --git a/drivers/regulator/wm8994-regulator.c b/drivers/regulator/wm8994-regulator.c index a612c356a697..8f2a8a7a3f99 100644 --- a/drivers/regulator/wm8994-regulator.c +++ b/drivers/regulator/wm8994-regulator.c @@ -185,8 +185,6 @@ static int wm8994_ldo_remove(struct platform_device *pdev) { struct wm8994_ldo *ldo = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); - regulator_unregister(ldo->regulator); return 0; From 85bea1bf33f6e66221c5818332382f2ed9f2ad0e Mon Sep 17 00:00:00 2001 From: Sachin Kamat Date: Wed, 8 May 2013 16:09:05 +0530 Subject: [PATCH 04/23] regulator: isl6271a: Use NULL instead of 0 init_data is a pointer. Use NULL instead of 0. Silences the following sparse warning: drivers/regulator/isl6271a-regulator.c:133:44: warning: Using plain integer as NULL pointer Signed-off-by: Sachin Kamat Signed-off-by: Mark Brown --- drivers/regulator/isl6271a-regulator.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/regulator/isl6271a-regulator.c b/drivers/regulator/isl6271a-regulator.c index d1e5bee2a26b..b99c49b9aff0 100644 --- a/drivers/regulator/isl6271a-regulator.c +++ b/drivers/regulator/isl6271a-regulator.c @@ -130,7 +130,7 @@ static int isl6271a_probe(struct i2c_client *i2c, if (i == 0) config.init_data = init_data; else - config.init_data = 0; + config.init_data = NULL; config.driver_data = pmic; pmic->rdev[i] = regulator_register(&isl_rd[i], &config); From 1586bb4a929688f2c5ba10b62eec6bd61eddaf6e Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Thu, 18 Apr 2013 14:52:55 +0800 Subject: [PATCH 05/23] regulator: Remove unnecessary include of linux/delay.h from regulator drivers All the drivers that need delay for the regulator voltage output voltage to stabilize after being enabled or after being set to a new value has been converted to implement enable_time and set_voltage_time_sel callbacks. Then regulator core will take care of the necessary delay. This patch removes the unneeded include of linux/delay.h in regulator drivers. Signed-off-by: Axel Lin Cc: Daniel Jeong Cc: Sangbeom Kim Cc: Chiwoong Byun Signed-off-by: Mark Brown --- drivers/regulator/lp8755.c | 1 - drivers/regulator/max77686.c | 1 - drivers/regulator/s2mps11.c | 1 - 3 files changed, 3 deletions(-) diff --git a/drivers/regulator/lp8755.c b/drivers/regulator/lp8755.c index f0f6ea05065b..d9e38b4c2adc 100644 --- a/drivers/regulator/lp8755.c +++ b/drivers/regulator/lp8755.c @@ -19,7 +19,6 @@ #include #include #include -#include #include #include #include diff --git a/drivers/regulator/max77686.c b/drivers/regulator/max77686.c index 20935b1a6ed4..f563057e5690 100644 --- a/drivers/regulator/max77686.c +++ b/drivers/regulator/max77686.c @@ -24,7 +24,6 @@ #include #include -#include #include #include #include diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c index cd9ea2ea1826..c9f16e17920f 100644 --- a/drivers/regulator/s2mps11.c +++ b/drivers/regulator/s2mps11.c @@ -12,7 +12,6 @@ */ #include -#include #include #include #include From 00fd6e6153100ae868975cab67f02df6f16343eb Mon Sep 17 00:00:00 2001 From: "Kim, Milo" Date: Mon, 20 May 2013 12:36:07 +0000 Subject: [PATCH 06/23] regulator: lp872x: support the device tree feature This patch enables the DT structure of the LP8720 and LP8725 device. The LP872x platform data is generated when the device tree is configured. Even if the platform data is NULL, it is no issue at all because the driver is configured with the default mode. Signed-off-by: Milo(Woogyom) Kim Signed-off-by: Mark Brown --- .../devicetree/bindings/regulator/lp872x.txt | 160 ++++++++++++++++++ drivers/regulator/lp872x.c | 116 ++++++++++++- 2 files changed, 274 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/regulator/lp872x.txt diff --git a/Documentation/devicetree/bindings/regulator/lp872x.txt b/Documentation/devicetree/bindings/regulator/lp872x.txt new file mode 100644 index 000000000000..78183182dad9 --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/lp872x.txt @@ -0,0 +1,160 @@ +Binding for TI/National Semiconductor LP872x Driver + +Required properties: + - compatible: "ti,lp8720" or "ti,lp8725" + - reg: I2C slave address. 0x7d = LP8720, 0x7a = LP8725 + +Optional properties: + - ti,general-config: the value of LP872X_GENERAL_CFG register (u8) + (LP8720) + bit[2]: BUCK output voltage control by external DVS pin or register + 1 = external pin, 0 = bit7 of register 08h + bit[1]: sleep control by external DVS pin or register + 1 = external pin, 0 = bit6 of register 08h + bit[0]: time step unit(usec). 1 = 25, 0 = 50 + + (LP8725) + bit[7:6]: time step unit(usec). 00 = 32, 01 = 64, 10 = 128, 11 = 256 + bit[4]: BUCK2 enable control. 1 = enable, 0 = disable + bit[3]: BUCK2 output voltage register address. 1 = 0Ah, 0 = 0Bh + bit[2]: BUCK1 output voltage control by external DVS pin or register + 1 = register 08h, 0 = DVS + bit[1]: LDO sleep control. 1 = sleep mode, 0 = normal + bit[0]: BUCK1 enable control, 1 = enable, 0 = disable + + For more details, please see the datasheet. + + - ti,update-config: define it when LP872X_GENERAL_CFG register should be set + - ti,dvs-gpio: GPIO specifier for external DVS pin control of LP872x devices. + - ti,dvs-vsel: DVS selector. 0 = SEL_V1, 1 = SEL_V2. + - ti,dvs-state: initial DVS pin state. 0 = DVS_LOW, 1 = DVS_HIGH. + + Sub nodes for regulator_init_data + LP8720 has maximum 6 nodes. (child name: ldo1 ~ 5 and buck) + LP8725 has maximum 9 nodes. (child name: ldo1 ~ 5, lilo1,2 and buck1,2) + For more details, please see the following binding document. + (Documentation/devicetree/bindings/regulator/regulator.txt) + +Datasheet + - LP8720: http://www.ti.com/lit/ds/symlink/lp8720.pdf + - LP8725: http://www.ti.com/lit/ds/symlink/lp8725.pdf + +Example 1) LP8720 + +lp8720@7d { + compatible = "ti,lp8720"; + reg = <0x7d>; + + /* external DVS pin used, timestep is 25usec */ + ti,general-config = /bits/ 8 <0x03>; + ti,update-config; + + /* + * The dvs-gpio depends on the processor environment. + * For example, following GPIO specifier means GPIO134 in OMAP4. + */ + ti,dvs-gpio = <&gpio5 6 0>; + ti,dvs-vsel = /bits/ 8 <1>; /* SEL_V2 */ + ti,dvs-state = /bits/ 8 <1>; /* DVS_HIGH */ + + vaf: ldo1 { + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <3300000>; + }; + + vmmc: ldo2 { + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <3300000>; + }; + + vcam_io: ldo3 { + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <3300000>; + regulator-boot-on; + }; + + vcam_core: ldo4 { + regulator-min-microvolt = <800000>; + regulator-max-microvolt = <2850000>; + regulator-boot-on; + }; + + vcam: ldo5 { + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <3300000>; + }; + + vcc: buck { + regulator-name = "VBUCK"; + regulator-min-microvolt = <800000>; + regulator-max-microvolt = <2300000>; + }; +}; + +Example 2) LP8725 + +lp8725@7a { + compatible = "ti,lp8725"; + reg = <0x7a>; + + /* Enable BUCK1,2, no DVS, normal LDO mode, timestep is 256usec */ + ti,general-config = /bits/ 8 <0xdd>; + ti,update-config; + + vcam_io: ldo1 { + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <3300000>; + }; + + vcam_core: ldo2 { + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <3300000>; + }; + + vcam: ldo3 { + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <3300000>; + }; + + vcmmb_io: ldo4 { + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <3300000>; + regulator-boot-on; + }; + + vcmmb_core: ldo5 { + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <3300000>; + regulator-boot-on; + }; + + vaux1: lilo1 { + regulator-name = "VAUX1"; + regulator-min-microvolt = <800000>; + regulator-max-microvolt = <3300000>; + }; + + vaux2: lilo2 { + regulator-name = "VAUX2"; + regulator-min-microvolt = <800000>; + regulator-max-microvolt = <3300000>; + }; + + vcc1: buck1 { + regulator-name = "VBUCK1"; + regulator-min-microvolt = <800000>; + regulator-max-microvolt = <3000000>; + regulator-min-microamp = <460000>; + regulator-max-microamp = <1370000>; + regulator-boot-on; + }; + + vcc2: buck2 { + regulator-name = "VBUCK2"; + regulator-min-microvolt = <800000>; + regulator-max-microvolt = <3000000>; + regulator-min-microamp = <460000>; + regulator-max-microamp = <1370000>; + regulator-boot-on; + }; +}; diff --git a/drivers/regulator/lp872x.c b/drivers/regulator/lp872x.c index f5fc4a142cdf..b16336bcd4d4 100644 --- a/drivers/regulator/lp872x.c +++ b/drivers/regulator/lp872x.c @@ -18,6 +18,9 @@ #include #include #include +#include +#include +#include /* Registers : LP8720/8725 shared */ #define LP872X_GENERAL_CFG 0x00 @@ -723,8 +726,8 @@ static int lp872x_init_dvs(struct lp872x *lp) gpio = dvs->gpio; if (!gpio_is_valid(gpio)) { - dev_err(lp->dev, "invalid gpio: %d\n", gpio); - return -EINVAL; + dev_warn(lp->dev, "invalid gpio: %d\n", gpio); + goto set_default_dvs_mode; } pinstate = dvs->init_state; @@ -829,6 +832,103 @@ static const struct regmap_config lp872x_regmap_config = { .max_register = MAX_REGISTERS, }; +#ifdef CONFIG_OF + +#define LP872X_VALID_OPMODE (REGULATOR_MODE_FAST | REGULATOR_MODE_NORMAL) + +static struct of_regulator_match lp8720_matches[] = { + { .name = "ldo1", .driver_data = (void *)LP8720_ID_LDO1, }, + { .name = "ldo2", .driver_data = (void *)LP8720_ID_LDO2, }, + { .name = "ldo3", .driver_data = (void *)LP8720_ID_LDO3, }, + { .name = "ldo4", .driver_data = (void *)LP8720_ID_LDO4, }, + { .name = "ldo5", .driver_data = (void *)LP8720_ID_LDO5, }, + { .name = "buck", .driver_data = (void *)LP8720_ID_BUCK, }, +}; + +static struct of_regulator_match lp8725_matches[] = { + { .name = "ldo1", .driver_data = (void *)LP8725_ID_LDO1, }, + { .name = "ldo2", .driver_data = (void *)LP8725_ID_LDO2, }, + { .name = "ldo3", .driver_data = (void *)LP8725_ID_LDO3, }, + { .name = "ldo4", .driver_data = (void *)LP8725_ID_LDO4, }, + { .name = "ldo5", .driver_data = (void *)LP8725_ID_LDO5, }, + { .name = "lilo1", .driver_data = (void *)LP8725_ID_LILO1, }, + { .name = "lilo2", .driver_data = (void *)LP8725_ID_LILO2, }, + { .name = "buck1", .driver_data = (void *)LP8725_ID_BUCK1, }, + { .name = "buck2", .driver_data = (void *)LP8725_ID_BUCK2, }, +}; + +static struct lp872x_platform_data +*lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which) +{ + struct device_node *np = dev->of_node; + struct lp872x_platform_data *pdata; + struct of_regulator_match *match; + struct regulator_init_data *d; + int num_matches; + int count; + int i; + u8 dvs_state; + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + goto out; + + of_property_read_u8(np, "ti,general-config", &pdata->general_config); + if (of_find_property(np, "ti,update-config", NULL)) + pdata->update_config = true; + + pdata->dvs = devm_kzalloc(dev, sizeof(struct lp872x_dvs), GFP_KERNEL); + if (!pdata->dvs) + goto out; + + pdata->dvs->gpio = of_get_named_gpio(np, "ti,dvs-gpio", 0); + of_property_read_u8(np, "ti,dvs-vsel", (u8 *)&pdata->dvs->vsel); + of_property_read_u8(np, "ti,dvs-state", &dvs_state); + pdata->dvs->init_state = dvs_state ? DVS_HIGH : DVS_LOW; + + if (of_get_child_count(np) == 0) + goto out; + + switch (which) { + case LP8720: + match = lp8720_matches; + num_matches = ARRAY_SIZE(lp8720_matches); + break; + case LP8725: + match = lp8725_matches; + num_matches = ARRAY_SIZE(lp8725_matches); + break; + default: + goto out; + } + + count = of_regulator_match(dev, np, match, num_matches); + if (count <= 0) + goto out; + + for (i = 0; i < num_matches; i++) { + pdata->regulator_data[i].id = (int)match[i].driver_data; + pdata->regulator_data[i].init_data = match[i].init_data; + + /* Operation mode configuration for buck/buck1/buck2 */ + if (strncmp(match[i].name, "buck", 4)) + continue; + + d = pdata->regulator_data[i].init_data; + d->constraints.valid_modes_mask |= LP872X_VALID_OPMODE; + d->constraints.valid_ops_mask |= REGULATOR_CHANGE_MODE; + } +out: + return pdata; +} +#else +static struct lp872x_platform_data +*lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which) +{ + return NULL; +} +#endif + static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id) { struct lp872x *lp; @@ -838,6 +938,10 @@ static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id) [LP8725] = LP8725_NUM_REGULATORS, }; + if (cl->dev.of_node) + cl->dev.platform_data = lp872x_populate_pdata_from_dt(&cl->dev, + (enum lp872x_id)id->driver_data); + lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL); if (!lp) goto err_mem; @@ -882,6 +986,13 @@ static int lp872x_remove(struct i2c_client *cl) return 0; } +static const struct of_device_id lp872x_dt_ids[] = { + { .compatible = "ti,lp8720", }, + { .compatible = "ti,lp8725", }, + { } +}; +MODULE_DEVICE_TABLE(of, lp872x_dt_ids); + static const struct i2c_device_id lp872x_ids[] = { {"lp8720", LP8720}, {"lp8725", LP8725}, @@ -893,6 +1004,7 @@ static struct i2c_driver lp872x_driver = { .driver = { .name = "lp872x", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(lp872x_dt_ids), }, .probe = lp872x_probe, .remove = lp872x_remove, From 2af0af67354b7c9b17d28e6ab47a8177afec125d Mon Sep 17 00:00:00 2001 From: Nikolay Balandin Date: Sat, 25 May 2013 14:50:40 -0700 Subject: [PATCH 07/23] regulator: lp397x: use devm_kzalloc() to make cleanup paths simpler Signed-off-by: Nikolay Balandin Signed-off-by: Mark Brown --- drivers/regulator/lp3971.c | 11 +++-------- drivers/regulator/lp3972.c | 11 +++-------- 2 files changed, 6 insertions(+), 16 deletions(-) diff --git a/drivers/regulator/lp3971.c b/drivers/regulator/lp3971.c index d8af9e773310..3809b4381606 100644 --- a/drivers/regulator/lp3971.c +++ b/drivers/regulator/lp3971.c @@ -434,7 +434,7 @@ static int lp3971_i2c_probe(struct i2c_client *i2c, return -ENODEV; } - lp3971 = kzalloc(sizeof(struct lp3971), GFP_KERNEL); + lp3971 = devm_kzalloc(&i2c->dev, sizeof(struct lp3971), GFP_KERNEL); if (lp3971 == NULL) return -ENOMEM; @@ -449,19 +449,15 @@ static int lp3971_i2c_probe(struct i2c_client *i2c, ret = -ENODEV; if (ret < 0) { dev_err(&i2c->dev, "failed to detect device\n"); - goto err_detect; + return ret; } ret = setup_regulators(lp3971, pdata); if (ret < 0) - goto err_detect; + return ret; i2c_set_clientdata(i2c, lp3971); return 0; - -err_detect: - kfree(lp3971); - return ret; } static int lp3971_i2c_remove(struct i2c_client *i2c) @@ -473,7 +469,6 @@ static int lp3971_i2c_remove(struct i2c_client *i2c) regulator_unregister(lp3971->rdev[i]); kfree(lp3971->rdev); - kfree(lp3971); return 0; } diff --git a/drivers/regulator/lp3972.c b/drivers/regulator/lp3972.c index 61e4cf9edf6e..573024039ca0 100644 --- a/drivers/regulator/lp3972.c +++ b/drivers/regulator/lp3972.c @@ -528,7 +528,7 @@ static int lp3972_i2c_probe(struct i2c_client *i2c, return -ENODEV; } - lp3972 = kzalloc(sizeof(struct lp3972), GFP_KERNEL); + lp3972 = devm_kzalloc(&i2c->dev, sizeof(struct lp3972), GFP_KERNEL); if (!lp3972) return -ENOMEM; @@ -546,19 +546,15 @@ static int lp3972_i2c_probe(struct i2c_client *i2c, } if (ret < 0) { dev_err(&i2c->dev, "failed to detect device. ret = %d\n", ret); - goto err_detect; + return ret; } ret = setup_regulators(lp3972, pdata); if (ret < 0) - goto err_detect; + return ret; i2c_set_clientdata(i2c, lp3972); return 0; - -err_detect: - kfree(lp3972); - return ret; } static int lp3972_i2c_remove(struct i2c_client *i2c) @@ -569,7 +565,6 @@ static int lp3972_i2c_remove(struct i2c_client *i2c) for (i = 0; i < lp3972->num_regulators; i++) regulator_unregister(lp3972->rdev[i]); kfree(lp3972->rdev); - kfree(lp3972); return 0; } From 2a668a8bc2cbe7a464ab1212475a3efb23a94b1e Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Fri, 7 Jun 2013 08:06:56 +0000 Subject: [PATCH 08/23] regulator: core: add regulator_get_linear_step() Add regulator_get_linear_step(), which returns the voltage step size between VSEL values for linear regulators. This is intended for use by regulator consumers which build their own voltage-to-VSEL tables. Signed-off-by: Paul Walmsley Reviewed-by: Andrew Chew Cc: Matthew Longnecker Signed-off-by: Mark Brown --- drivers/regulator/core.c | 15 +++++++++++++++ include/linux/regulator/consumer.h | 1 + 2 files changed, 16 insertions(+) diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 6e5017841582..f07d7adefdda 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2134,6 +2134,21 @@ int regulator_list_voltage(struct regulator *regulator, unsigned selector) } EXPORT_SYMBOL_GPL(regulator_list_voltage); +/** + * regulator_get_linear_step - return the voltage step size between VSEL values + * @regulator: regulator source + * + * Returns the voltage step size between VSEL values for linear + * regulators, or return 0 if the regulator isn't a linear regulator. + */ +unsigned int regulator_get_linear_step(struct regulator *regulator) +{ + struct regulator_dev *rdev = regulator->rdev; + + return rdev->desc->uV_step; +} +EXPORT_SYMBOL_GPL(regulator_get_linear_step); + /** * regulator_is_supported_voltage - check if a voltage range can be supported * diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h index 145022a83085..3a76389c6aaa 100644 --- a/include/linux/regulator/consumer.h +++ b/include/linux/regulator/consumer.h @@ -165,6 +165,7 @@ int regulator_count_voltages(struct regulator *regulator); int regulator_list_voltage(struct regulator *regulator, unsigned selector); int regulator_is_supported_voltage(struct regulator *regulator, int min_uV, int max_uV); +unsigned int regulator_get_linear_step(struct regulator *regulator); int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV); int regulator_set_voltage_time(struct regulator *regulator, int old_uV, int new_uV); From 1e1bb58da2ae080002578c35f80495dadda50940 Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Fri, 7 Jun 2013 17:11:24 +0100 Subject: [PATCH 09/23] regulator: ab8500: Ensure AB8500 external registers are probed first This patch changes the order in which the AB8500 regulator drivers are registered and subsequently probed. It saves a lot of -EPROBE_DEFEER nonsense and bootlog noise, as some AB8500 core regulators depend on the external ones for supply voltage. Signed-off-by: Lee Jones Signed-off-by: Mark Brown --- drivers/regulator/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 47a34ff88f98..0f4964ee5d30 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -12,7 +12,7 @@ obj-$(CONFIG_REGULATOR_USERSPACE_CONSUMER) += userspace-consumer.o obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o -obj-$(CONFIG_REGULATOR_AB8500) += ab8500.o ab8500-ext.o +obj-$(CONFIG_REGULATOR_AB8500) += ab8500-ext.o ab8500.o obj-$(CONFIG_REGULATOR_AD5398) += ad5398.o obj-$(CONFIG_REGULATOR_ANATOP) += anatop-regulator.o obj-$(CONFIG_REGULATOR_ARIZONA) += arizona-micsupp.o arizona-ldo1.o From 33fb880249b1f2f349461c64d19bdfe2e969c1ba Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Fri, 7 Jun 2013 17:11:25 +0100 Subject: [PATCH 10/23] regulator: ab8500-ext: Provide a set_voltage call-back operation When registering regulators which have a single voltage through Device Tree, the framework insists that the specified voltage is actually set. Well in order to do that we need to provide this call-back, where we check that the value is sane and return without error. Not that the selector isn't populated, but in our case list_voltage doesn't actually use it, so we're good. Signed-off-by: Lee Jones Signed-off-by: Mark Brown --- drivers/regulator/ab8500-ext.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/regulator/ab8500-ext.c b/drivers/regulator/ab8500-ext.c index b4d45472aae6..e4975bc61e81 100644 --- a/drivers/regulator/ab8500-ext.c +++ b/drivers/regulator/ab8500-ext.c @@ -229,6 +229,28 @@ static unsigned int ab8500_ext_regulator_get_mode(struct regulator_dev *rdev) return ret; } +static int ab8500_ext_set_voltage(struct regulator_dev *rdev, int min_uV, + int max_uV, unsigned *selector) +{ + struct regulation_constraints *regu_constraints = rdev->constraints; + + if (!regu_constraints) { + dev_err(rdev_get_dev(rdev), "No regulator constraints\n"); + return -EINVAL; + } + + if (regu_constraints->min_uV == min_uV && + regu_constraints->max_uV == max_uV) + return 0; + + dev_err(rdev_get_dev(rdev), + "Requested min %duV max %duV != constrained min %duV max %duV\n", + min_uV, max_uV, + regu_constraints->min_uV, regu_constraints->max_uV); + + return -EINVAL; +} + static int ab8500_ext_list_voltage(struct regulator_dev *rdev, unsigned selector) { @@ -252,6 +274,7 @@ static struct regulator_ops ab8500_ext_regulator_ops = { .is_enabled = ab8500_ext_regulator_is_enabled, .set_mode = ab8500_ext_regulator_set_mode, .get_mode = ab8500_ext_regulator_get_mode, + .set_voltage = ab8500_ext_set_voltage, .list_voltage = ab8500_ext_list_voltage, }; From 5a49b4a527e5b72ae3a4f64f078759f83fbd98b5 Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Fri, 7 Jun 2013 17:11:26 +0100 Subject: [PATCH 11/23] regulator: ab8500-ext: Register as a device in its own right Some platforms don't support the AB8500 external regulators, so instead of having a list of is_() calls prior to calling ab8500_ext_regulator_init() from ab8500_regulator_probe(), we can only register as a platform device on platforms which require them. It means we also have more control over them when booting with Device Tree. Signed-off-by: Lee Jones Signed-off-by: Mark Brown --- drivers/regulator/ab8500-ext.c | 33 ++++++++++++++++++++++++++++++-- drivers/regulator/ab8500.c | 17 +--------------- include/linux/regulator/ab8500.h | 4 ---- 3 files changed, 32 insertions(+), 22 deletions(-) diff --git a/drivers/regulator/ab8500-ext.c b/drivers/regulator/ab8500-ext.c index e4975bc61e81..95f495f51d00 100644 --- a/drivers/regulator/ab8500-ext.c +++ b/drivers/regulator/ab8500-ext.c @@ -333,7 +333,7 @@ static struct ab8500_ext_regulator_info }, }; -int ab8500_ext_regulator_init(struct platform_device *pdev) +int ab8500_ext_regulator_probe(struct platform_device *pdev) { struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent); struct ab8500_platform_data *ppdata; @@ -409,7 +409,7 @@ int ab8500_ext_regulator_init(struct platform_device *pdev) return 0; } -void ab8500_ext_regulator_exit(struct platform_device *pdev) +int ab8500_ext_regulator_remove(struct platform_device *pdev) { int i; @@ -422,8 +422,37 @@ void ab8500_ext_regulator_exit(struct platform_device *pdev) regulator_unregister(info->rdev); } + + return 0; } +static struct platform_driver ab8500_ext_regulator_driver = { + .probe = ab8500_ext_regulator_probe, + .remove = ab8500_ext_regulator_remove, + .driver = { + .name = "ab8500-ext-regulator", + .owner = THIS_MODULE, + }, +}; + +static int __init ab8500_ext_regulator_init(void) +{ + int ret; + + ret = platform_driver_register(&ab8500_ext_regulator_driver); + if (ret) + pr_err("Failed to register ab8500 ext regulator: %d\n", ret); + + return ret; +} +subsys_initcall(ab8500_ext_regulator_init); + +static void __exit ab8500_ext_regulator_exit(void) +{ + platform_driver_unregister(&ab8500_ext_regulator_driver); +} +module_exit(ab8500_ext_regulator_exit); + MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Bengt Jonsson "); MODULE_DESCRIPTION("AB8500 external regulator driver"); diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c index f6656b8c28b6..dfc790196b34 100644 --- a/drivers/regulator/ab8500.c +++ b/drivers/regulator/ab8500.c @@ -3156,22 +3156,12 @@ static int ab8500_regulator_probe(struct platform_device *pdev) return err; } - if (!is_ab8505(ab8500)) { - /* register external regulators (before Vaux1, 2 and 3) */ - err = ab8500_ext_regulator_init(pdev); - if (err) - return err; - } - /* register all regulators */ for (i = 0; i < abx500_regulator.info_size; i++) { err = ab8500_regulator_register(pdev, &pdata->regulator[i], i, NULL); - if (err < 0) { - if (!is_ab8505(ab8500)) - ab8500_ext_regulator_exit(pdev); + if (err < 0) return err; - } } return 0; @@ -3180,7 +3170,6 @@ static int ab8500_regulator_probe(struct platform_device *pdev) static int ab8500_regulator_remove(struct platform_device *pdev) { int i, err; - struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent); for (i = 0; i < abx500_regulator.info_size; i++) { struct ab8500_regulator_info *info = NULL; @@ -3192,10 +3181,6 @@ static int ab8500_regulator_remove(struct platform_device *pdev) regulator_unregister(info->regulator); } - /* remove external regulators (after Vaux1, 2 and 3) */ - if (!is_ab8505(ab8500)) - ab8500_ext_regulator_exit(pdev); - /* remove regulator debug */ err = ab8500_regulator_debug_exit(pdev); if (err) diff --git a/include/linux/regulator/ab8500.h b/include/linux/regulator/ab8500.h index 7c5ff0c55773..75307447cef9 100644 --- a/include/linux/regulator/ab8500.h +++ b/include/linux/regulator/ab8500.h @@ -336,8 +336,4 @@ static inline int ab8500_regulator_debug_exit(struct platform_device *pdev) } #endif -/* AB8500 external regulator functions. */ -int ab8500_ext_regulator_init(struct platform_device *pdev); -void ab8500_ext_regulator_exit(struct platform_device *pdev); - #endif From 30aa4b26c00f5c5ae6081f85e7adca47dcb24e29 Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Fri, 7 Jun 2013 17:11:27 +0100 Subject: [PATCH 12/23] regulator: ab8500-ext: Enable for Device Tree Here we use the OF regulator match facility to collect and populate initialisation data from Device Tree if we're booting with it enabled. Signed-off-by: Lee Jones Signed-off-by: Mark Brown --- drivers/regulator/ab8500-ext.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/drivers/regulator/ab8500-ext.c b/drivers/regulator/ab8500-ext.c index 95f495f51d00..4137a2fe42c3 100644 --- a/drivers/regulator/ab8500-ext.c +++ b/drivers/regulator/ab8500-ext.c @@ -16,9 +16,11 @@ #include #include #include +#include #include #include #include +#include #include #include #include @@ -333,18 +335,37 @@ static struct ab8500_ext_regulator_info }, }; +static struct of_regulator_match ab8500_ext_regulator_match[] = { + { .name = "ab8500_ext1", .driver_data = (void *) AB8500_EXT_SUPPLY1, }, + { .name = "ab8500_ext2", .driver_data = (void *) AB8500_EXT_SUPPLY2, }, + { .name = "ab8500_ext3", .driver_data = (void *) AB8500_EXT_SUPPLY3, }, +}; + int ab8500_ext_regulator_probe(struct platform_device *pdev) { struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent); struct ab8500_platform_data *ppdata; struct ab8500_regulator_platform_data *pdata; + struct device_node *np = pdev->dev.of_node; struct regulator_config config = { }; int i, err; + if (np) { + err = of_regulator_match(&pdev->dev, np, + ab8500_ext_regulator_match, + ARRAY_SIZE(ab8500_ext_regulator_match)); + if (err < 0) { + dev_err(&pdev->dev, + "Error parsing regulator init data: %d\n", err); + return err; + } + } + if (!ab8500) { dev_err(&pdev->dev, "null mfd parent\n"); return -EINVAL; } + ppdata = dev_get_platdata(ab8500->dev); if (!ppdata) { dev_err(&pdev->dev, "null parent pdata\n"); @@ -385,8 +406,11 @@ int ab8500_ext_regulator_probe(struct platform_device *pdev) pdata->ext_regulator[i].driver_data; config.dev = &pdev->dev; - config.init_data = &pdata->ext_regulator[i]; config.driver_data = info; + config.of_node = ab8500_ext_regulator_match[i].of_node; + config.init_data = (np) ? + ab8500_ext_regulator_match[i].init_data : + &pdata->ext_regulator[i]; /* register regulator with framework */ info->rdev = regulator_register(&info->desc, &config); From ce6f5ea3a7240c15e5775d5b9c5c57629943ca6c Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Fri, 7 Jun 2013 17:11:28 +0100 Subject: [PATCH 13/23] regulator: ab8500: Provide supply names for the AUX regulators On some platforms the AUX[1|2|3] regulators are supplied voltage by a separate regulator. For example on Snowball these are provided by the EXT3. If we list them here, we can supply voltage to them by simply listing them in as a consumer of EXT3 in the Snowball case. Signed-off-by: Lee Jones Signed-off-by: Mark Brown --- drivers/regulator/ab8500.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c index dfc790196b34..bb02108c95e1 100644 --- a/drivers/regulator/ab8500.c +++ b/drivers/regulator/ab8500.c @@ -719,6 +719,7 @@ static struct ab8500_regulator_info .n_voltages = ARRAY_SIZE(ldo_vauxn_voltages), .volt_table = ldo_vauxn_voltages, .enable_time = 200, + .supply_name = "vin", }, .load_lp_uA = 5000, .update_bank = 0x04, @@ -741,6 +742,7 @@ static struct ab8500_regulator_info .n_voltages = ARRAY_SIZE(ldo_vauxn_voltages), .volt_table = ldo_vauxn_voltages, .enable_time = 200, + .supply_name = "vin", }, .load_lp_uA = 5000, .update_bank = 0x04, @@ -763,6 +765,7 @@ static struct ab8500_regulator_info .n_voltages = ARRAY_SIZE(ldo_vaux3_voltages), .volt_table = ldo_vaux3_voltages, .enable_time = 450, + .supply_name = "vin", }, .load_lp_uA = 5000, .update_bank = 0x04, From 0a62d03b4844988c5477f13bd17c3553f816ce87 Mon Sep 17 00:00:00 2001 From: Tuomas Tynkkynen Date: Tue, 18 Jun 2013 13:14:41 +0300 Subject: [PATCH 14/23] regulator: tps62360: Fix crash in i2c_driver .probe Commit "i2c: core: make it possible to match a pure device tree driver" changed semantics of the i2c probing for device tree devices. Device tree probed devices now get a NULL i2c_device_id pointer. This caused kernel panics due to NULL dereference. Tested-by: Stephen Warren Reviewed-by: Stephen Warren Signed-off-by: Tuomas Tynkkynen Signed-off-by: Mark Brown --- drivers/regulator/tps62360-regulator.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/regulator/tps62360-regulator.c b/drivers/regulator/tps62360-regulator.c index 612919c3081c..a490d5b749b2 100644 --- a/drivers/regulator/tps62360-regulator.c +++ b/drivers/regulator/tps62360-regulator.c @@ -351,7 +351,6 @@ static int tps62360_probe(struct i2c_client *client, int chip_id; pdata = client->dev.platform_data; - chip_id = id->driver_data; if (client->dev.of_node) { const struct of_device_id *match; @@ -364,6 +363,11 @@ static int tps62360_probe(struct i2c_client *client, chip_id = (int)match->data; if (!pdata) pdata = of_get_tps62360_platform_data(&client->dev); + } else if (id) { + chip_id = id->driver_data; + } else { + dev_err(&client->dev, "No device tree match or id table match found\n"); + return -ENODEV; } if (!pdata) { @@ -402,7 +406,7 @@ static int tps62360_probe(struct i2c_client *client, return -ENODEV; } - tps->desc.name = id->name; + tps->desc.name = client->name; tps->desc.id = 0; tps->desc.ops = &tps62360_dcdc_ops; tps->desc.type = REGULATOR_VOLTAGE; From d26ec830f5d7345cc501ff6fe9d44c7e23930432 Mon Sep 17 00:00:00 2001 From: Tushar Behera Date: Tue, 18 Jun 2013 09:45:07 +0530 Subject: [PATCH 15/23] regulator: ti-abb: Convert to use devm_ioremap_resource Commit 75096579c3ac ("lib: devres: Introduce devm_ioremap_resource()") introduced devm_ioremap_resource() and deprecated the use of devm_request_and_ioremap(). While at it, remove the error message as devm_ioremap_resource prints a similar error message. Signed-off-by: Tushar Behera Signed-off-by: Mark Brown --- drivers/regulator/ti-abb-regulator.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/regulator/ti-abb-regulator.c b/drivers/regulator/ti-abb-regulator.c index 870d209ec866..3753ed05e719 100644 --- a/drivers/regulator/ti-abb-regulator.c +++ b/drivers/regulator/ti-abb-regulator.c @@ -722,10 +722,9 @@ static int ti_abb_probe(struct platform_device *pdev) ret = -ENODEV; goto err; } - abb->base = devm_request_and_ioremap(dev, res); - if (!abb->base) { - dev_err(dev, "Unable to map '%s'\n", pname); - ret = -ENOMEM; + abb->base = devm_ioremap_resource(dev, res); + if (IS_ERR(abb->base)) { + ret = PTR_ERR(abb->base); goto err; } @@ -776,10 +775,9 @@ static int ti_abb_probe(struct platform_device *pdev) ret = -ENODEV; goto skip_opt; } - abb->ldo_base = devm_request_and_ioremap(dev, res); - if (!abb->ldo_base) { - dev_err(dev, "Unable to map '%s'\n", pname); - ret = -ENOMEM; + abb->ldo_base = devm_ioremap_resource(dev, res); + if (IS_ERR(abb->ldo_base)) { + ret = PTR_ERR(abb->ldo_base); goto err; } From 93134c7b40580ae8bb061d278a3ecffd7bbfccd6 Mon Sep 17 00:00:00 2001 From: Kishon Vijay Abraham I Date: Thu, 20 Jun 2013 14:07:37 +0530 Subject: [PATCH 16/23] regulator: of: Added a property to indicate bypass mode support Added a property to indicate if the regulator supports bypass mode. Also modified of_get_regulation_constraints() to check for that property and set appropriate constraints. Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Mark Brown --- Documentation/devicetree/bindings/regulator/regulator.txt | 1 + drivers/regulator/of_regulator.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/regulator/regulator.txt b/Documentation/devicetree/bindings/regulator/regulator.txt index ecfc6ccd67ef..48a3b8e5d6bd 100644 --- a/Documentation/devicetree/bindings/regulator/regulator.txt +++ b/Documentation/devicetree/bindings/regulator/regulator.txt @@ -9,6 +9,7 @@ Optional properties: - regulator-max-microamp: largest current consumers may set - regulator-always-on: boolean, regulator should never be disabled - regulator-boot-on: bootloader/firmware enabled regulator +- regulator-allow-bypass: allow the regulator to go into bypass mode - -supply: phandle to the parent supply/regulator node - regulator-ramp-delay: ramp delay for regulator(in uV/uS) diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c index 66ca769287ab..f3c8f8f9dc39 100644 --- a/drivers/regulator/of_regulator.c +++ b/drivers/regulator/of_regulator.c @@ -61,6 +61,9 @@ static void of_get_regulation_constraints(struct device_node *np, else /* status change should be possible if not always on. */ constraints->valid_ops_mask |= REGULATOR_CHANGE_STATUS; + if (of_property_read_bool(np, "regulator-allow-bypass")) + constraints->valid_ops_mask |= REGULATOR_CHANGE_BYPASS; + ramp_delay = of_get_property(np, "regulator-ramp-delay", NULL); if (ramp_delay) constraints->ramp_delay = be32_to_cpu(*ramp_delay); From db892ff6c0f49708f13d9dff3957034f2f90e1c1 Mon Sep 17 00:00:00 2001 From: Guennadi Liakhovetski Date: Fri, 21 Jun 2013 08:30:22 +0200 Subject: [PATCH 17/23] regulators: max8973: fix multiple instance support Currently the max8973 regulator driver uses a single static struct of regulator operations for all chip instances, but can overwrite some of its members depending on configuration. This will affect all other MAX8973 instances on the system. This patch fixes this bug by allocating a separate copy of the struct for each chip instance. Signed-off-by: Guennadi Liakhovetski Signed-off-by: Mark Brown --- drivers/regulator/max8973-regulator.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/regulator/max8973-regulator.c b/drivers/regulator/max8973-regulator.c index adb1414e5e37..b2dbdd70cab1 100644 --- a/drivers/regulator/max8973-regulator.c +++ b/drivers/regulator/max8973-regulator.c @@ -100,6 +100,7 @@ struct max8973_chip { int curr_vout_reg; int curr_gpio_val; bool valid_dvs_gpio; + struct regulator_ops ops; }; /* @@ -240,7 +241,7 @@ static unsigned int max8973_dcdc_get_mode(struct regulator_dev *rdev) REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL; } -static struct regulator_ops max8973_dcdc_ops = { +static const struct regulator_ops max8973_dcdc_ops = { .get_voltage_sel = max8973_dcdc_get_voltage_sel, .set_voltage_sel = max8973_dcdc_set_voltage_sel, .list_voltage = regulator_list_voltage_linear, @@ -388,10 +389,11 @@ static int max8973_probe(struct i2c_client *client, } i2c_set_clientdata(client, max); + max->ops = max8973_dcdc_ops; max->dev = &client->dev; max->desc.name = id->name; max->desc.id = 0; - max->desc.ops = &max8973_dcdc_ops; + max->desc.ops = &max->ops; max->desc.type = REGULATOR_VOLTAGE; max->desc.owner = THIS_MODULE; max->desc.min_uV = MAX8973_MIN_VOLATGE; @@ -401,9 +403,9 @@ static int max8973_probe(struct i2c_client *client, if (!pdata->enable_ext_control) { max->desc.enable_reg = MAX8973_VOUT; max->desc.enable_mask = MAX8973_VOUT_ENABLE; - max8973_dcdc_ops.enable = regulator_enable_regmap; - max8973_dcdc_ops.disable = regulator_disable_regmap; - max8973_dcdc_ops.is_enabled = regulator_is_enabled_regmap; + max->ops.enable = regulator_enable_regmap; + max->ops.disable = regulator_disable_regmap; + max->ops.is_enabled = regulator_is_enabled_regmap; } max->enable_external_control = pdata->enable_ext_control; From 42dc30231ba35939213c33378c17cb81c31b0a37 Mon Sep 17 00:00:00 2001 From: Guennadi Liakhovetski Date: Mon, 24 Jun 2013 12:50:16 +0200 Subject: [PATCH 18/23] regulator: max8973: initial DT support This patch adds primitive DT support to the max8973 regulator driver. None of the configuration parameters, supported in the platform data are yet available in DT, therefore no configuration is performed if booting with no platform data. This means, that DT instantiation can only be used on boards, where no run-time configuration of the chip is required. In such cases the driver can be used to scale its output voltage. In the future support for configuration parameters should be added. Signed-off-by: Guennadi Liakhovetski Signed-off-by: Mark Brown --- .../bindings/regulator/max8973-regulator.txt | 21 +++++++++++ drivers/regulator/max8973-regulator.c | 37 +++++++++++++------ 2 files changed, 46 insertions(+), 12 deletions(-) create mode 100644 Documentation/devicetree/bindings/regulator/max8973-regulator.txt diff --git a/Documentation/devicetree/bindings/regulator/max8973-regulator.txt b/Documentation/devicetree/bindings/regulator/max8973-regulator.txt new file mode 100644 index 000000000000..8d38ab2acac5 --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/max8973-regulator.txt @@ -0,0 +1,21 @@ +* Maxim MAX8973 Voltage Regulator + +Required properties: + +- compatible: must be "maxium,max8973" +- reg: the i2c slave address of the regulator. It should be 0x1b. + +Any standard regulator properties can be used to configure the single max8973 +DCDC. + +Example: + + max8973@1b { + compatible = "maxium,max8973"; + reg = <0x1b>; + + regulator-min-microvolt = <935000>; + regulator-max-microvolt = <1200000>; + regulator-boot-on; + regulator-always-on; + }; diff --git a/drivers/regulator/max8973-regulator.c b/drivers/regulator/max8973-regulator.c index b2dbdd70cab1..0c5195a842e2 100644 --- a/drivers/regulator/max8973-regulator.c +++ b/drivers/regulator/max8973-regulator.c @@ -26,10 +26,12 @@ #include #include #include +#include #include #include #include #include +#include #include #include #include @@ -370,7 +372,8 @@ static int max8973_probe(struct i2c_client *client, int ret; pdata = client->dev.platform_data; - if (!pdata) { + + if (!pdata && !client->dev.of_node) { dev_err(&client->dev, "No Platform data"); return -EIO; } @@ -400,7 +403,7 @@ static int max8973_probe(struct i2c_client *client, max->desc.uV_step = MAX8973_VOLATGE_STEP; max->desc.n_voltages = MAX8973_BUCK_N_VOLTAGE; - if (!pdata->enable_ext_control) { + if (!pdata || !pdata->enable_ext_control) { max->desc.enable_reg = MAX8973_VOUT; max->desc.enable_mask = MAX8973_VOUT_ENABLE; max->ops.enable = regulator_enable_regmap; @@ -408,12 +411,17 @@ static int max8973_probe(struct i2c_client *client, max->ops.is_enabled = regulator_is_enabled_regmap; } - max->enable_external_control = pdata->enable_ext_control; - max->dvs_gpio = pdata->dvs_gpio; - max->curr_gpio_val = pdata->dvs_def_state; - max->curr_vout_reg = MAX8973_VOUT + pdata->dvs_def_state; + if (pdata) { + max->dvs_gpio = pdata->dvs_gpio; + max->enable_external_control = pdata->enable_ext_control; + max->curr_gpio_val = pdata->dvs_def_state; + max->curr_vout_reg = MAX8973_VOUT + pdata->dvs_def_state; + } else { + max->dvs_gpio = -EINVAL; + max->curr_vout_reg = MAX8973_VOUT; + } + max->lru_index[0] = max->curr_vout_reg; - max->valid_dvs_gpio = false; if (gpio_is_valid(max->dvs_gpio)) { int gpio_flags; @@ -439,16 +447,21 @@ static int max8973_probe(struct i2c_client *client, max->lru_index[i] = i; max->lru_index[0] = max->curr_vout_reg; max->lru_index[max->curr_vout_reg] = 0; + } else { + max->valid_dvs_gpio = false; } - ret = max8973_init_dcdc(max, pdata); - if (ret < 0) { - dev_err(max->dev, "Max8973 Init failed, err = %d\n", ret); - return ret; + if (pdata) { + ret = max8973_init_dcdc(max, pdata); + if (ret < 0) { + dev_err(max->dev, "Max8973 Init failed, err = %d\n", ret); + return ret; + } } config.dev = &client->dev; - config.init_data = pdata->reg_init_data; + config.init_data = pdata ? pdata->reg_init_data : + of_get_regulator_init_data(&client->dev, client->dev.of_node); config.driver_data = max; config.of_node = client->dev.of_node; config.regmap = max->regmap; From f986c35689996caddfddb096ead8095c91f7f155 Mon Sep 17 00:00:00 2001 From: Guennadi Liakhovetski Date: Tue, 25 Jun 2013 09:07:06 +0200 Subject: [PATCH 19/23] regulator: max8973: fix a typo in documentation Fix a s/maxium/maxim/ typo in DT binding documentation. Reported-by: Sergei Shtylyov Signed-off-by: Guennadi Liakhovetski Signed-off-by: Mark Brown --- .../devicetree/bindings/regulator/max8973-regulator.txt | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/regulator/max8973-regulator.txt b/Documentation/devicetree/bindings/regulator/max8973-regulator.txt index 8d38ab2acac5..4f15d8a1bfd0 100644 --- a/Documentation/devicetree/bindings/regulator/max8973-regulator.txt +++ b/Documentation/devicetree/bindings/regulator/max8973-regulator.txt @@ -2,7 +2,7 @@ Required properties: -- compatible: must be "maxium,max8973" +- compatible: must be "maxim,max8973" - reg: the i2c slave address of the regulator. It should be 0x1b. Any standard regulator properties can be used to configure the single max8973 @@ -11,7 +11,7 @@ DCDC. Example: max8973@1b { - compatible = "maxium,max8973"; + compatible = "maxim,max8973"; reg = <0x1b>; regulator-min-microvolt = <935000>; From 80b022e29bfdffb6c9ac0a283bcad3e1030c4c7e Mon Sep 17 00:00:00 2001 From: Jonghwa Lee Date: Tue, 25 Jun 2013 10:08:38 +0900 Subject: [PATCH 20/23] regulator: max77693: Add max77693 regualtor driver. This patch adds new regulator driver to support max77693 chip's regulators. max77693 has two linear voltage regulators and one current regulator which can be controlled through I2C bus. This driver also supports device tree. Signed-off-by: Jonghwa Lee Signed-off-by: Myungjoo Ham Signed-off-by: Mark Brown --- .../devicetree/bindings/mfd/max77693.txt | 55 +++ drivers/regulator/Kconfig | 9 + drivers/regulator/Makefile | 1 + drivers/regulator/max77693.c | 324 ++++++++++++++++++ include/linux/mfd/max77693-private.h | 13 + include/linux/mfd/max77693.h | 18 + 6 files changed, 420 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/max77693.txt create mode 100644 drivers/regulator/max77693.c diff --git a/Documentation/devicetree/bindings/mfd/max77693.txt b/Documentation/devicetree/bindings/mfd/max77693.txt new file mode 100644 index 000000000000..11921cc417bf --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/max77693.txt @@ -0,0 +1,55 @@ +Maxim MAX77693 multi-function device + +MAX77693 is a Multifunction device with the following submodules: +- PMIC, +- CHARGER, +- LED, +- MUIC, +- HAPTIC + +It is interfaced to host controller using i2c. +This document describes the bindings for the mfd device. + +Required properties: +- compatible : Must be "maxim,max77693". +- reg : Specifies the i2c slave address of PMIC block. +- interrupts : This i2c device has an IRQ line connected to the main SoC. +- interrupt-parent : The parent interrupt controller. + +Optional properties: +- regulators : The regulators of max77693 have to be instantiated under subnod + named "regulators" using the following format. + + regulators { + regualtor-compatible = ESAFEOUT1/ESAFEOUT2/CHARGER + standard regulator constratints[*]. + }; + + [*] refer Documentation/devicetree/bindings/regulator/regulator.txt + +Example: + max77693@66 { + compatible = "maxim,max77693"; + reg = <0x66>; + interrupt-parent = <&gpx1>; + interrupts = <5 2>; + + regulators { + esafeout@1 { + regulator-compatible = "ESAFEOUT1"; + regulator-name = "ESAFEOUT1"; + regulator-boot-on; + }; + esafeout@2 { + regulator-compatible = "ESAFEOUT2"; + regulator-name = "ESAFEOUT2"; + }; + charger@0 { + regulator-compatible = "CHARGER"; + regulator-name = "CHARGER"; + regulator-min-microamp = <60000>; + regulator-max-microamp = <2580000>; + regulator-boot-on; + }; + }; + }; diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 8bb26446037e..9744437afe32 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -250,6 +250,15 @@ config REGULATOR_MAX77686 via I2C bus. The provided regulator is suitable for Exynos-4 chips to control VARM and VINT voltages. +config REGULATOR_MAX77693 + tristate "Maxim MAX77693 regulator" + depends on MFD_MAX77693 + help + This driver controls a Maxim 77693 regulator via I2C bus. + The regulators include two LDOs, 'SAFEOUT1', 'SAFEOUT2' + and one current regulator 'CHARGER'. This is suitable for + Exynos-4x12 chips. + config REGULATOR_PCAP tristate "Motorola PCAP2 regulator driver" depends on EZX_PCAP diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 47a34ff88f98..a4094cd274be 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -41,6 +41,7 @@ obj-$(CONFIG_REGULATOR_MAX8973) += max8973-regulator.o obj-$(CONFIG_REGULATOR_MAX8997) += max8997.o obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o obj-$(CONFIG_REGULATOR_MAX77686) += max77686.o +obj-$(CONFIG_REGULATOR_MAX77693) += max77693.o obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o diff --git a/drivers/regulator/max77693.c b/drivers/regulator/max77693.c new file mode 100644 index 000000000000..674ece7c832b --- /dev/null +++ b/drivers/regulator/max77693.c @@ -0,0 +1,324 @@ +/* + * max77693.c - Regulator driver for the Maxim 77693 + * + * Copyright (C) 2013 Samsung Electronics + * Jonghwa Lee + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * This driver is based on max77686.c + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CHGIN_ILIM_STEP_20mA 20000 + +struct max77693_pmic_dev { + struct device *dev; + struct max77693_dev *iodev; + int num_regulators; + struct regulator_dev **rdev; +}; + +/* CHARGER regulator ops */ +/* CHARGER regulator uses two bits for enabling */ +static int max77693_chg_is_enabled(struct regulator_dev *rdev) +{ + int ret; + u8 val; + + ret = max77693_read_reg(rdev->regmap, rdev->desc->enable_reg, &val); + if (ret) + return ret; + + return (val & rdev->desc->enable_mask) == rdev->desc->enable_mask; +} + +/* + * CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA + * 0x00, 0x01, 0x2, 0x03 = 60 mA + * 0x04 ~ 0x7E = (60 + (X - 3) * 20) mA + */ +static int max77693_chg_get_current_limit(struct regulator_dev *rdev) +{ + unsigned int chg_min_uA = rdev->constraints->min_uA; + unsigned int chg_max_uA = rdev->constraints->max_uA; + u8 reg, sel; + unsigned int val; + int ret; + + ret = max77693_read_reg(rdev->regmap, + MAX77693_CHG_REG_CHG_CNFG_09, ®); + if (ret < 0) + return ret; + + sel = reg & CHG_CNFG_09_CHGIN_ILIM_MASK; + + /* the first four codes for charger current are all 60mA */ + if (sel <= 3) + sel = 0; + else + sel -= 3; + + val = chg_min_uA + CHGIN_ILIM_STEP_20mA * sel; + if (val > chg_max_uA) + return -EINVAL; + + return val; +} + +static int max77693_chg_set_current_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + unsigned int chg_min_uA = rdev->constraints->min_uA; + int sel = 0; + + while (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel < min_uA) + sel++; + + if (chg_min_uA * CHGIN_ILIM_STEP_20mA * sel > max_uA) + return -EINVAL; + + /* the first four codes for charger current are all 60mA */ + sel += 3; + + return max77693_write_reg(rdev->regmap, + MAX77693_CHG_REG_CHG_CNFG_09, sel); +} +/* end of CHARGER regulator ops */ + +static const unsigned int max77693_safeout_table[] = { + 4850000, + 4900000, + 4950000, + 3300000, +}; + +static struct regulator_ops max77693_safeout_ops = { + .list_voltage = regulator_list_voltage_table, + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, +}; + +static struct regulator_ops max77693_charger_ops = { + .is_enabled = max77693_chg_is_enabled, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .get_current_limit = max77693_chg_get_current_limit, + .set_current_limit = max77693_chg_set_current_limit, +}; + +#define regulator_desc_esafeout(_num) { \ + .name = "ESAFEOUT"#_num, \ + .id = MAX77693_ESAFEOUT##_num, \ + .n_voltages = 4, \ + .ops = &max77693_safeout_ops, \ + .type = REGULATOR_VOLTAGE, \ + .volt_table = max77693_safeout_table, \ + .vsel_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \ + .vsel_mask = SAFEOUT_CTRL_SAFEOUT##_num##_MASK, \ + .enable_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \ + .enable_mask = SAFEOUT_CTRL_ENSAFEOUT##_num##_MASK , \ +} + +static struct regulator_desc regulators[] = { + regulator_desc_esafeout(1), + regulator_desc_esafeout(2), + { + .name = "CHARGER", + .id = MAX77693_CHARGER, + .ops = &max77693_charger_ops, + .type = REGULATOR_CURRENT, + .owner = THIS_MODULE, + .enable_reg = MAX77693_CHG_REG_CHG_CNFG_00, + .enable_mask = CHG_CNFG_00_CHG_MASK | + CHG_CNFG_00_BUCK_MASK, + }, +}; + +#ifdef CONFIG_OF +static int max77693_pmic_dt_parse_rdata(struct device *dev, + struct max77693_regulator_data **rdata) +{ + struct device_node *np; + struct of_regulator_match *rmatch; + struct max77693_regulator_data *tmp; + int i, matched = 0; + + np = of_find_node_by_name(dev->parent->of_node, "regulators"); + if (!np) + return -EINVAL; + + rmatch = devm_kzalloc(dev, + sizeof(*rmatch) * ARRAY_SIZE(regulators), GFP_KERNEL); + if (!rmatch) + return -ENOMEM; + + for (i = 0; i < ARRAY_SIZE(regulators); i++) + rmatch[i].name = regulators[i].name; + + matched = of_regulator_match(dev, np, rmatch, ARRAY_SIZE(regulators)); + if (matched <= 0) + return matched; + *rdata = devm_kzalloc(dev, sizeof(**rdata) * matched, GFP_KERNEL); + if (!(*rdata)) + return -ENOMEM; + + tmp = *rdata; + + for (i = 0; i < ARRAY_SIZE(regulators); i++) { + if (!rmatch[i].init_data) + continue; + tmp->initdata = rmatch[i].init_data; + tmp->of_node = rmatch[i].of_node; + tmp->id = regulators[i].id; + tmp++; + } + + return matched; +} +#else +static int max77693_pmic_dt_parse_rdata(struct device *dev, + struct max77693_regulator_data **rdata) +{ + return 0; +} +#endif /* CONFIG_OF */ + +static int max77693_pmic_init_rdata(struct device *dev, + struct max77693_regulator_data **rdata) +{ + struct max77693_platform_data *pdata; + int num_regulators = 0; + + pdata = dev_get_platdata(dev->parent); + if (pdata) { + *rdata = pdata->regulators; + num_regulators = pdata->num_regulators; + } + + if (!(*rdata) && dev->parent->of_node) + num_regulators = max77693_pmic_dt_parse_rdata(dev, rdata); + + return num_regulators; +} + +static int max77693_pmic_probe(struct platform_device *pdev) +{ + struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent); + struct max77693_pmic_dev *max77693_pmic; + struct max77693_regulator_data *rdata = NULL; + int num_rdata, i, ret; + struct regulator_config config; + + num_rdata = max77693_pmic_init_rdata(&pdev->dev, &rdata); + if (!rdata || num_rdata <= 0) { + dev_err(&pdev->dev, "No init data supplied.\n"); + return -ENODEV; + } + + max77693_pmic = devm_kzalloc(&pdev->dev, + sizeof(struct max77693_pmic_dev), + GFP_KERNEL); + if (!max77693_pmic) + return -ENOMEM; + + max77693_pmic->rdev = devm_kzalloc(&pdev->dev, + sizeof(struct regulator_dev *) * num_rdata, + GFP_KERNEL); + if (!max77693_pmic->rdev) + return -ENOMEM; + + max77693_pmic->dev = &pdev->dev; + max77693_pmic->iodev = iodev; + max77693_pmic->num_regulators = num_rdata; + + config.dev = &pdev->dev; + config.regmap = iodev->regmap; + config.driver_data = max77693_pmic; + platform_set_drvdata(pdev, max77693_pmic); + + for (i = 0; i < max77693_pmic->num_regulators; i++) { + int id = rdata[i].id; + + config.init_data = rdata[i].initdata; + config.of_node = rdata[i].of_node; + + max77693_pmic->rdev[i] = regulator_register(®ulators[id], + &config); + if (IS_ERR(max77693_pmic->rdev[i])) { + ret = PTR_ERR(max77693_pmic->rdev[i]); + dev_err(max77693_pmic->dev, + "Failed to initialize regulator-%d\n", id); + max77693_pmic->rdev[i] = NULL; + goto err; + } + } + + return 0; + err: + while (--i >= 0) + regulator_unregister(max77693_pmic->rdev[i]); + + return ret; +} + +static int max77693_pmic_remove(struct platform_device *pdev) +{ + struct max77693_pmic_dev *max77693_pmic = platform_get_drvdata(pdev); + struct regulator_dev **rdev = max77693_pmic->rdev; + int i; + + for (i = 0; i < max77693_pmic->num_regulators; i++) + if (rdev[i]) + regulator_unregister(rdev[i]); + + return 0; +} + +static const struct platform_device_id max77693_pmic_id[] = { + {"max77693-pmic", 0}, + {}, +}; + +MODULE_DEVICE_TABLE(platform, max77693_pmic_id); + +static struct platform_driver max77693_pmic_driver = { + .driver = { + .name = "max77693-pmic", + .owner = THIS_MODULE, + }, + .probe = max77693_pmic_probe, + .remove = max77693_pmic_remove, + .id_table = max77693_pmic_id, +}; + +module_platform_driver(max77693_pmic_driver); + +MODULE_DESCRIPTION("MAXIM MAX77693 regulator driver"); +MODULE_AUTHOR("Jonghwa Lee "); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/max77693-private.h b/include/linux/mfd/max77693-private.h index 1aa4f13cdfa6..244fb0d51589 100644 --- a/include/linux/mfd/max77693-private.h +++ b/include/linux/mfd/max77693-private.h @@ -85,6 +85,19 @@ enum max77693_pmic_reg { MAX77693_PMIC_REG_END, }; +/* MAX77693 CHG_CNFG_00 register */ +#define CHG_CNFG_00_CHG_MASK 0x1 +#define CHG_CNFG_00_BUCK_MASK 0x4 + +/* MAX77693 CHG_CNFG_09 Register */ +#define CHG_CNFG_09_CHGIN_ILIM_MASK 0x7F + +/* MAX77693 CHG_CTRL Register */ +#define SAFEOUT_CTRL_SAFEOUT1_MASK 0x3 +#define SAFEOUT_CTRL_SAFEOUT2_MASK 0xC +#define SAFEOUT_CTRL_ENSAFEOUT1_MASK 0x40 +#define SAFEOUT_CTRL_ENSAFEOUT2_MASK 0x80 + /* Slave addr = 0x4A: MUIC */ enum max77693_muic_reg { MAX77693_MUIC_REG_ID = 0x00, diff --git a/include/linux/mfd/max77693.h b/include/linux/mfd/max77693.h index 3109a6c5c948..676f0f388992 100644 --- a/include/linux/mfd/max77693.h +++ b/include/linux/mfd/max77693.h @@ -30,6 +30,20 @@ #ifndef __LINUX_MFD_MAX77693_H #define __LINUX_MFD_MAX77693_H +/* MAX77686 regulator IDs */ +enum max77693_regulators { + MAX77693_ESAFEOUT1 = 0, + MAX77693_ESAFEOUT2, + MAX77693_CHARGER, + MAX77693_REG_MAX, +}; + +struct max77693_regulator_data { + int id; + struct regulator_init_data *initdata; + struct device_node *of_node; +}; + struct max77693_reg_data { u8 addr; u8 data; @@ -52,6 +66,10 @@ struct max77693_muic_platform_data { struct max77693_platform_data { int wakeup; + /* regulator data */ + struct max77693_regulator_data *regulators; + int num_regulators; + /* muic data */ struct max77693_muic_platform_data *muic_data; }; From 08d49f4372ebee2b06d6988ecca37612fdc5b897 Mon Sep 17 00:00:00 2001 From: Sachin Kamat Date: Wed, 26 Jun 2013 10:13:37 +0530 Subject: [PATCH 21/23] regulator: ab8500-ext: Staticize local symbols Local symbols used only in this file are made static. Signed-off-by: Sachin Kamat Signed-off-by: Mark Brown --- drivers/regulator/ab8500-ext.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/regulator/ab8500-ext.c b/drivers/regulator/ab8500-ext.c index 4137a2fe42c3..02ff691cdb8b 100644 --- a/drivers/regulator/ab8500-ext.c +++ b/drivers/regulator/ab8500-ext.c @@ -341,7 +341,7 @@ static struct of_regulator_match ab8500_ext_regulator_match[] = { { .name = "ab8500_ext3", .driver_data = (void *) AB8500_EXT_SUPPLY3, }, }; -int ab8500_ext_regulator_probe(struct platform_device *pdev) +static int ab8500_ext_regulator_probe(struct platform_device *pdev) { struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent); struct ab8500_platform_data *ppdata; @@ -433,7 +433,7 @@ int ab8500_ext_regulator_probe(struct platform_device *pdev) return 0; } -int ab8500_ext_regulator_remove(struct platform_device *pdev) +static int ab8500_ext_regulator_remove(struct platform_device *pdev) { int i; From f3ecdd7bf6a782a6eafe9c2c5d39fcb487e2a154 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Sat, 29 Jun 2013 11:37:29 +0800 Subject: [PATCH 22/23] regulator: max77693: Fix trivial typo Fix trivial typo in the equation to check upper bound of current setting. Signed-off-by: Axel Lin Acked-by: Jonghwa Lee Signed-off-by: Mark Brown --- drivers/regulator/max77693.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/regulator/max77693.c b/drivers/regulator/max77693.c index 674ece7c832b..d45a4dd17131 100644 --- a/drivers/regulator/max77693.c +++ b/drivers/regulator/max77693.c @@ -97,7 +97,7 @@ static int max77693_chg_set_current_limit(struct regulator_dev *rdev, while (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel < min_uA) sel++; - if (chg_min_uA * CHGIN_ILIM_STEP_20mA * sel > max_uA) + if (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel > max_uA) return -EINVAL; /* the first four codes for charger current are all 60mA */ From 8c7e7ddf31ca9943b70e58d1c47d059beda435bd Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Sun, 30 Jun 2013 00:33:52 +0800 Subject: [PATCH 23/23] regulator: max77693: Remove NULL test for rmatch[i].init_data The implementation in of_regulator_match() already ensures match->init_data is not NULL for all matched cases if the return value of of_regulator_match() > 0. Thus remove NULL test for rmatch[i].init_data. This patch also fixes the condition for loop iteration. The for loop should iterate "matched" times rather than ARRAY_SIZE(regulators) because we only allocate "matched" number of entries for rdata. Though in most cases, "matched" == ARRAY_SIZE(regulators). Signed-off-by: Axel Lin Acked-by: Jonghwa Lee Signed-off-by: Mark Brown --- drivers/regulator/max77693.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/regulator/max77693.c b/drivers/regulator/max77693.c index d45a4dd17131..ce4b96c15eba 100644 --- a/drivers/regulator/max77693.c +++ b/drivers/regulator/max77693.c @@ -190,9 +190,7 @@ static int max77693_pmic_dt_parse_rdata(struct device *dev, tmp = *rdata; - for (i = 0; i < ARRAY_SIZE(regulators); i++) { - if (!rmatch[i].init_data) - continue; + for (i = 0; i < matched; i++) { tmp->initdata = rmatch[i].init_data; tmp->of_node = rmatch[i].of_node; tmp->id = regulators[i].id;