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02f3703934
In of_get_regulation_constraints() we were taking the result of
of_map_mode() (an unsigned int) and assigning it to an int. We were
then checking whether this value was -EINVAL. Some implementers of
of_map_mode() were returning -EINVAL (even though the return type of
their function needed to be unsigned int) because they needed to
signal an error back to of_get_regulation_constraints().
In general in the regulator framework the mode is always referred to
as an unsigned int. While we could fix this to be a signed int (the
highest value we store in there right now is 0x8), it's actually
pretty clean to just define the regulator mode 0x0 (the lack of any
bits set) as an invalid mode. Let's do that.
Fixes: 5e5e3a42c6 ("regulator: of: Add support for parsing initial and suspend modes")
Suggested-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
480 lines
14 KiB
C
480 lines
14 KiB
C
/*
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* Motorola CPCAP PMIC regulator driver
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*
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* Based on cpcap-regulator.c from Motorola Linux kernel tree
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* Copyright (C) 2009-2011 Motorola, Inc.
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*
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* Rewritten for mainline kernel to use device tree and regmap
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* Copyright (C) 2017 Tony Lindgren <tony@atomide.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/mfd/motorola-cpcap.h>
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/*
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* Resource assignment register bits. These seem to control the state
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* idle modes adn are used at least for omap4.
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*/
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/* CPCAP_REG_ASSIGN2 bits - Resource Assignment 2 */
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#define CPCAP_BIT_VSDIO_SEL BIT(15)
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#define CPCAP_BIT_VDIG_SEL BIT(14)
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#define CPCAP_BIT_VCAM_SEL BIT(13)
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#define CPCAP_BIT_SW6_SEL BIT(12)
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#define CPCAP_BIT_SW5_SEL BIT(11)
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#define CPCAP_BIT_SW4_SEL BIT(10)
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#define CPCAP_BIT_SW3_SEL BIT(9)
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#define CPCAP_BIT_SW2_SEL BIT(8)
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#define CPCAP_BIT_SW1_SEL BIT(7)
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/* CPCAP_REG_ASSIGN3 bits - Resource Assignment 3 */
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#define CPCAP_BIT_VUSBINT2_SEL BIT(15)
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#define CPCAP_BIT_VUSBINT1_SEL BIT(14)
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#define CPCAP_BIT_VVIB_SEL BIT(13)
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#define CPCAP_BIT_VWLAN1_SEL BIT(12)
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#define CPCAP_BIT_VRF1_SEL BIT(11)
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#define CPCAP_BIT_VHVIO_SEL BIT(10)
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#define CPCAP_BIT_VDAC_SEL BIT(9)
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#define CPCAP_BIT_VUSB_SEL BIT(8)
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#define CPCAP_BIT_VSIM_SEL BIT(7)
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#define CPCAP_BIT_VRFREF_SEL BIT(6)
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#define CPCAP_BIT_VPLL_SEL BIT(5)
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#define CPCAP_BIT_VFUSE_SEL BIT(4)
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#define CPCAP_BIT_VCSI_SEL BIT(3)
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#define CPCAP_BIT_SPARE_14_2 BIT(2)
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#define CPCAP_BIT_VWLAN2_SEL BIT(1)
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#define CPCAP_BIT_VRF2_SEL BIT(0)
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/* CPCAP_REG_ASSIGN4 bits - Resource Assignment 4 */
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#define CPCAP_BIT_VAUDIO_SEL BIT(0)
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/*
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* Enable register bits. At least CPCAP_BIT_AUDIO_LOW_PWR is generic,
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* and not limited to audio regulator. Let's use the Motorola kernel
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* naming for now until we have a better understanding of the other
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* enable register bits. No idea why BIT(3) is not defined.
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*/
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#define CPCAP_BIT_AUDIO_LOW_PWR BIT(6)
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#define CPCAP_BIT_AUD_LOWPWR_SPEED BIT(5)
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#define CPCAP_BIT_VAUDIOPRISTBY BIT(4)
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#define CPCAP_BIT_VAUDIO_MODE1 BIT(2)
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#define CPCAP_BIT_VAUDIO_MODE0 BIT(1)
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#define CPCAP_BIT_V_AUDIO_EN BIT(0)
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#define CPCAP_BIT_AUDIO_NORMAL_MODE 0x00
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/*
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* Off mode configuration bit. Used currently only by SW5 on omap4. There's
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* the following comment in Motorola Linux kernel tree for it:
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*
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* When set in the regulator mode, the regulator assignment will be changed
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* to secondary when the regulator is disabled. The mode will be set back to
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* primary when the regulator is turned on.
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*/
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#define CPCAP_REG_OFF_MODE_SEC BIT(15)
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/**
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* SoC specific configuraion for CPCAP regulator. There are at least three
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* different SoCs each with their own parameters: omap3, omap4 and tegra2.
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*
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* The assign_reg and assign_mask seem to allow toggling between primary
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* and secondary mode that at least omap4 uses for off mode.
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*/
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struct cpcap_regulator {
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struct regulator_desc rdesc;
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const u16 assign_reg;
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const u16 assign_mask;
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const u16 vsel_shift;
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};
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#define CPCAP_REG(_ID, reg, assignment_reg, assignment_mask, val_tbl, \
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mode_mask, volt_mask, volt_shft, \
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mode_val, off_val, volt_trans_time) { \
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.rdesc = { \
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.name = #_ID, \
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.of_match = of_match_ptr(#_ID), \
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.ops = &cpcap_regulator_ops, \
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.regulators_node = of_match_ptr("regulators"), \
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.type = REGULATOR_VOLTAGE, \
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.id = CPCAP_##_ID, \
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.owner = THIS_MODULE, \
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.n_voltages = ARRAY_SIZE(val_tbl), \
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.volt_table = (val_tbl), \
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.vsel_reg = (reg), \
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.vsel_mask = (volt_mask), \
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.enable_reg = (reg), \
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.enable_mask = (mode_mask), \
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.enable_val = (mode_val), \
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.disable_val = (off_val), \
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.ramp_delay = (volt_trans_time), \
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.of_map_mode = cpcap_map_mode, \
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}, \
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.assign_reg = (assignment_reg), \
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.assign_mask = (assignment_mask), \
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.vsel_shift = (volt_shft), \
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}
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struct cpcap_ddata {
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struct regmap *reg;
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struct device *dev;
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const struct cpcap_regulator *soc;
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};
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enum cpcap_regulator_id {
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CPCAP_SW1,
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CPCAP_SW2,
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CPCAP_SW3,
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CPCAP_SW4,
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CPCAP_SW5,
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CPCAP_SW6,
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CPCAP_VCAM,
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CPCAP_VCSI,
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CPCAP_VDAC,
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CPCAP_VDIG,
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CPCAP_VFUSE,
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CPCAP_VHVIO,
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CPCAP_VSDIO,
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CPCAP_VPLL,
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CPCAP_VRF1,
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CPCAP_VRF2,
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CPCAP_VRFREF,
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CPCAP_VWLAN1,
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CPCAP_VWLAN2,
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CPCAP_VSIM,
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CPCAP_VSIMCARD,
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CPCAP_VVIB,
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CPCAP_VUSB,
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CPCAP_VAUDIO,
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CPCAP_NR_REGULATORS,
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};
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/*
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* We need to also configure regulator idle mode for SoC off mode if
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* CPCAP_REG_OFF_MODE_SEC is set.
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*/
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static int cpcap_regulator_enable(struct regulator_dev *rdev)
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{
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struct cpcap_regulator *regulator = rdev_get_drvdata(rdev);
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int error, ignore;
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error = regulator_enable_regmap(rdev);
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if (error)
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return error;
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if (rdev->desc->enable_val & CPCAP_REG_OFF_MODE_SEC) {
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error = regmap_update_bits(rdev->regmap, regulator->assign_reg,
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regulator->assign_mask,
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regulator->assign_mask);
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if (error)
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ignore = regulator_disable_regmap(rdev);
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}
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return error;
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}
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/*
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* We need to also configure regulator idle mode for SoC off mode if
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* CPCAP_REG_OFF_MODE_SEC is set.
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*/
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static int cpcap_regulator_disable(struct regulator_dev *rdev)
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{
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struct cpcap_regulator *regulator = rdev_get_drvdata(rdev);
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int error, ignore;
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if (rdev->desc->enable_val & CPCAP_REG_OFF_MODE_SEC) {
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error = regmap_update_bits(rdev->regmap, regulator->assign_reg,
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regulator->assign_mask, 0);
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if (error)
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return error;
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}
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error = regulator_disable_regmap(rdev);
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if (error && (rdev->desc->enable_val & CPCAP_REG_OFF_MODE_SEC)) {
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ignore = regmap_update_bits(rdev->regmap, regulator->assign_reg,
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regulator->assign_mask,
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regulator->assign_mask);
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}
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return error;
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}
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static unsigned int cpcap_map_mode(unsigned int mode)
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{
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switch (mode) {
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case CPCAP_BIT_AUDIO_NORMAL_MODE:
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return REGULATOR_MODE_NORMAL;
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case CPCAP_BIT_AUDIO_LOW_PWR:
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return REGULATOR_MODE_STANDBY;
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default:
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return REGULATOR_MODE_INVALID;
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}
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}
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static unsigned int cpcap_regulator_get_mode(struct regulator_dev *rdev)
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{
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int value;
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regmap_read(rdev->regmap, rdev->desc->enable_reg, &value);
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if (value & CPCAP_BIT_AUDIO_LOW_PWR)
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return REGULATOR_MODE_STANDBY;
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return REGULATOR_MODE_NORMAL;
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}
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static int cpcap_regulator_set_mode(struct regulator_dev *rdev,
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unsigned int mode)
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{
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int value;
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switch (mode) {
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case REGULATOR_MODE_NORMAL:
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value = CPCAP_BIT_AUDIO_NORMAL_MODE;
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break;
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case REGULATOR_MODE_STANDBY:
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value = CPCAP_BIT_AUDIO_LOW_PWR;
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break;
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default:
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return -EINVAL;
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}
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return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
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CPCAP_BIT_AUDIO_LOW_PWR, value);
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}
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static struct regulator_ops cpcap_regulator_ops = {
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.enable = cpcap_regulator_enable,
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.disable = cpcap_regulator_disable,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_iterate,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_mode = cpcap_regulator_get_mode,
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.set_mode = cpcap_regulator_set_mode,
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};
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static const unsigned int unknown_val_tbl[] = { 0, };
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static const unsigned int sw5_val_tbl[] = { 0, 5050000, };
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static const unsigned int vcam_val_tbl[] = { 2600000, 2700000, 2800000,
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2900000, };
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static const unsigned int vcsi_val_tbl[] = { 1200000, 1800000, };
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static const unsigned int vdac_val_tbl[] = { 1200000, 1500000, 1800000,
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2500000,};
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static const unsigned int vdig_val_tbl[] = { 1200000, 1350000, 1500000,
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1875000, };
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static const unsigned int vfuse_val_tbl[] = { 1500000, 1600000, 1700000,
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1800000, 1900000, 2000000,
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2100000, 2200000, 2300000,
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2400000, 2500000, 2600000,
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2700000, 3150000, };
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static const unsigned int vhvio_val_tbl[] = { 2775000, };
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static const unsigned int vsdio_val_tbl[] = { 1500000, 1600000, 1800000,
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2600000, 2700000, 2800000,
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2900000, 3000000, };
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static const unsigned int vpll_val_tbl[] = { 1200000, 1300000, 1400000,
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1800000, };
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/* Quirk: 2775000 is before 2500000 for vrf1 regulator */
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static const unsigned int vrf1_val_tbl[] = { 2775000, 2500000, };
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static const unsigned int vrf2_val_tbl[] = { 0, 2775000, };
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static const unsigned int vrfref_val_tbl[] = { 2500000, 2775000, };
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static const unsigned int vwlan1_val_tbl[] = { 1800000, 1900000, };
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static const unsigned int vwlan2_val_tbl[] = { 2775000, 3000000, 3300000,
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3300000, };
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static const unsigned int vsim_val_tbl[] = { 1800000, 2900000, };
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static const unsigned int vsimcard_val_tbl[] = { 1800000, 2900000, };
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static const unsigned int vvib_val_tbl[] = { 1300000, 1800000, 2000000,
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3000000, };
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static const unsigned int vusb_val_tbl[] = { 0, 3300000, };
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static const unsigned int vaudio_val_tbl[] = { 0, 2775000, };
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/**
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* SoC specific configuration for omap4. The data below is comes from Motorola
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* Linux kernel tree. It's basically the values of cpcap_regltr_data,
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* cpcap_regulator_mode_values and cpcap_regulator_off_mode_values, see
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* CPCAP_REG macro above.
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*
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* SW1 to SW4 and SW6 seems to be unused for mapphone. Note that VSIM and
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* VSIMCARD have a shared resource assignment bit.
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*/
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static struct cpcap_regulator omap4_regulators[] = {
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CPCAP_REG(SW1, CPCAP_REG_S1C1, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_SW1_SEL, unknown_val_tbl,
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0, 0, 0, 0, 0, 0),
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CPCAP_REG(SW2, CPCAP_REG_S2C1, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_SW2_SEL, unknown_val_tbl,
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0, 0, 0, 0, 0, 0),
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CPCAP_REG(SW3, CPCAP_REG_S3C, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_SW3_SEL, unknown_val_tbl,
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0, 0, 0, 0, 0, 0),
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CPCAP_REG(SW4, CPCAP_REG_S4C1, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_SW4_SEL, unknown_val_tbl,
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0, 0, 0, 0, 0, 0),
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CPCAP_REG(SW5, CPCAP_REG_S5C, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_SW5_SEL, sw5_val_tbl,
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0x28, 0, 0, 0x20 | CPCAP_REG_OFF_MODE_SEC, 0, 0),
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CPCAP_REG(SW6, CPCAP_REG_S6C, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_SW6_SEL, unknown_val_tbl,
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0, 0, 0, 0, 0, 0),
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CPCAP_REG(VCAM, CPCAP_REG_VCAMC, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_VCAM_SEL, vcam_val_tbl,
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0x87, 0x30, 4, 0x3, 0, 420),
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CPCAP_REG(VCSI, CPCAP_REG_VCSIC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VCSI_SEL, vcsi_val_tbl,
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0x47, 0x10, 4, 0x43, 0x41, 350),
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CPCAP_REG(VDAC, CPCAP_REG_VDACC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VDAC_SEL, vdac_val_tbl,
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0x87, 0x30, 4, 0x3, 0, 420),
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CPCAP_REG(VDIG, CPCAP_REG_VDIGC, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_VDIG_SEL, vdig_val_tbl,
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0x87, 0x30, 4, 0x82, 0, 420),
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CPCAP_REG(VFUSE, CPCAP_REG_VFUSEC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VFUSE_SEL, vfuse_val_tbl,
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0x80, 0xf, 0, 0x80, 0, 420),
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CPCAP_REG(VHVIO, CPCAP_REG_VHVIOC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VHVIO_SEL, vhvio_val_tbl,
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0x17, 0, 0, 0, 0x12, 0),
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CPCAP_REG(VSDIO, CPCAP_REG_VSDIOC, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_VSDIO_SEL, vsdio_val_tbl,
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0x87, 0x38, 3, 0x82, 0, 420),
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CPCAP_REG(VPLL, CPCAP_REG_VPLLC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VPLL_SEL, vpll_val_tbl,
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0x43, 0x18, 3, 0x2, 0, 420),
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CPCAP_REG(VRF1, CPCAP_REG_VRF1C, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VRF1_SEL, vrf1_val_tbl,
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0xac, 0x2, 1, 0x4, 0, 10),
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CPCAP_REG(VRF2, CPCAP_REG_VRF2C, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VRF2_SEL, vrf2_val_tbl,
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0x23, 0x8, 3, 0, 0, 10),
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CPCAP_REG(VRFREF, CPCAP_REG_VRFREFC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VRFREF_SEL, vrfref_val_tbl,
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0x23, 0x8, 3, 0, 0, 420),
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CPCAP_REG(VWLAN1, CPCAP_REG_VWLAN1C, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VWLAN1_SEL, vwlan1_val_tbl,
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0x47, 0x10, 4, 0, 0, 420),
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CPCAP_REG(VWLAN2, CPCAP_REG_VWLAN2C, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VWLAN2_SEL, vwlan2_val_tbl,
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0x20c, 0xc0, 6, 0x20c, 0, 420),
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CPCAP_REG(VSIM, CPCAP_REG_VSIMC, CPCAP_REG_ASSIGN3,
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0xffff, vsim_val_tbl,
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0x23, 0x8, 3, 0x3, 0, 420),
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CPCAP_REG(VSIMCARD, CPCAP_REG_VSIMC, CPCAP_REG_ASSIGN3,
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0xffff, vsimcard_val_tbl,
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0x1e80, 0x8, 3, 0x1e00, 0, 420),
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CPCAP_REG(VVIB, CPCAP_REG_VVIBC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VVIB_SEL, vvib_val_tbl,
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0x1, 0xc, 2, 0x1, 0, 500),
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CPCAP_REG(VUSB, CPCAP_REG_VUSBC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VUSB_SEL, vusb_val_tbl,
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0x11c, 0x40, 6, 0xc, 0, 0),
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CPCAP_REG(VAUDIO, CPCAP_REG_VAUDIOC, CPCAP_REG_ASSIGN4,
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CPCAP_BIT_VAUDIO_SEL, vaudio_val_tbl,
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0x16, 0x1, 0, 0x4, 0, 0),
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{ /* sentinel */ },
|
|
};
|
|
|
|
static const struct of_device_id cpcap_regulator_id_table[] = {
|
|
{
|
|
.compatible = "motorola,cpcap-regulator",
|
|
},
|
|
{
|
|
.compatible = "motorola,mapphone-cpcap-regulator",
|
|
.data = omap4_regulators,
|
|
},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, cpcap_regulator_id_table);
|
|
|
|
static int cpcap_regulator_probe(struct platform_device *pdev)
|
|
{
|
|
struct cpcap_ddata *ddata;
|
|
const struct of_device_id *match;
|
|
struct regulator_config config;
|
|
struct regulator_init_data init_data;
|
|
int i;
|
|
|
|
match = of_match_device(of_match_ptr(cpcap_regulator_id_table),
|
|
&pdev->dev);
|
|
if (!match)
|
|
return -EINVAL;
|
|
|
|
if (!match->data) {
|
|
dev_err(&pdev->dev, "no configuration data found\n");
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
|
|
if (!ddata)
|
|
return -ENOMEM;
|
|
|
|
ddata->reg = dev_get_regmap(pdev->dev.parent, NULL);
|
|
if (!ddata->reg)
|
|
return -ENODEV;
|
|
|
|
ddata->dev = &pdev->dev;
|
|
ddata->soc = match->data;
|
|
platform_set_drvdata(pdev, ddata);
|
|
|
|
memset(&config, 0, sizeof(config));
|
|
memset(&init_data, 0, sizeof(init_data));
|
|
config.dev = &pdev->dev;
|
|
config.regmap = ddata->reg;
|
|
config.init_data = &init_data;
|
|
|
|
for (i = 0; i < CPCAP_NR_REGULATORS; i++) {
|
|
const struct cpcap_regulator *regulator = &ddata->soc[i];
|
|
struct regulator_dev *rdev;
|
|
|
|
if (!regulator->rdesc.name)
|
|
break;
|
|
|
|
if (regulator->rdesc.volt_table == unknown_val_tbl)
|
|
continue;
|
|
|
|
config.driver_data = (void *)regulator;
|
|
rdev = devm_regulator_register(&pdev->dev,
|
|
®ulator->rdesc,
|
|
&config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(&pdev->dev, "failed to register regulator %s\n",
|
|
regulator->rdesc.name);
|
|
|
|
return PTR_ERR(rdev);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver cpcap_regulator_driver = {
|
|
.probe = cpcap_regulator_probe,
|
|
.driver = {
|
|
.name = "cpcap-regulator",
|
|
.of_match_table = of_match_ptr(cpcap_regulator_id_table),
|
|
},
|
|
};
|
|
|
|
module_platform_driver(cpcap_regulator_driver);
|
|
|
|
MODULE_ALIAS("platform:cpcap-regulator");
|
|
MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
|
|
MODULE_DESCRIPTION("CPCAP regulator driver");
|
|
MODULE_LICENSE("GPL v2");
|