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linux/drivers/regulator/twl6030-regulator.c
Douglas Anderson 259b93b21a
regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers that existed in 4.14 
Probing of regulators can be a slow operation and can contribute to
slower boot times. This is especially true if a regulator is turned on
at probe time (with regulator-boot-on or regulator-always-on) and the
regulator requires delays (off-on-time, ramp time, etc).

While the overall kernel is not ready to switch to async probe by
default, as per the discussion on the mailing lists [1] it is believed
that the regulator subsystem is in good shape and we can move
regulator drivers over wholesale. There is no way to just magically
opt in all regulators (regulators are just normal drivers like
platform_driver), so we set PROBE_PREFER_ASYNCHRONOUS for all
regulators found in 'drivers/regulator' individually.

Given the number of drivers touched and the impossibility to test this
ahead of time, it wouldn't be shocking at all if this caused a
regression for someone. If there is a regression caused by this patch,
it's likely to be one of the cases talked about in [1]. As a "quick
fix", drivers involved in the regression could be fixed by changing
them to PROBE_FORCE_SYNCHRONOUS. That being said, the correct fix
would be to directly fix the problem that caused the issue with async
probe.

The approach here follows a similar approach that was used for the mmc
subsystem several years ago [2]. In fact, I ran nearly the same python
script to auto-generate the changes. The only thing I changed was to
search for "i2c_driver", "spmi_driver", and "spi_driver" in addition
to "platform_driver".

[1] https://lore.kernel.org/r/06db017f-e985-4434-8d1d-02ca2100cca0@sirena.org.uk
[2] https://lore.kernel.org/r/20200903232441.2694866-1-dianders@chromium.org/

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20230316125351.1.I2a4677392a38db5758dee0788b2cea5872562a82@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-03-20 13:11:25 +00:00

787 lines
20 KiB
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Split TWL6030 logic from twl-regulator.c:
* Copyright (C) 2008 David Brownell
*
* Copyright (C) 2016 Nicolae Rosia <nicolae.rosia@gmail.com>
*/
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/twl.h>
#include <linux/delay.h>
struct twlreg_info {
/* start of regulator's PM_RECEIVER control register bank */
u8 base;
/* twl resource ID, for resource control state machine */
u8 id;
u8 flags;
/* used by regulator core */
struct regulator_desc desc;
/* chip specific features */
unsigned long features;
/* data passed from board for external get/set voltage */
void *data;
};
/* LDO control registers ... offset is from the base of its register bank.
* The first three registers of all power resource banks help hardware to
* manage the various resource groups.
*/
/* Common offset in TWL4030/6030 */
#define VREG_GRP 0
/* TWL6030 register offsets */
#define VREG_TRANS 1
#define VREG_STATE 2
#define VREG_VOLTAGE 3
#define VREG_VOLTAGE_SMPS 4
/* TWL6030 Misc register offsets */
#define VREG_BC_ALL 1
#define VREG_BC_REF 2
#define VREG_BC_PROC 3
#define VREG_BC_CLK_RST 4
/* TWL6030 LDO register values for VREG_VOLTAGE */
#define TWL6030_VREG_VOLTAGE_WR_S BIT(7)
/* TWL6030 LDO register values for CFG_STATE */
#define TWL6030_CFG_STATE_OFF 0x00
#define TWL6030_CFG_STATE_ON 0x01
#define TWL6030_CFG_STATE_OFF2 0x02
#define TWL6030_CFG_STATE_SLEEP 0x03
#define TWL6030_CFG_STATE_GRP_SHIFT 5
#define TWL6030_CFG_STATE_APP_SHIFT 2
#define TWL6030_CFG_STATE_MASK 0x03
#define TWL6030_CFG_STATE_APP_MASK (0x03 << TWL6030_CFG_STATE_APP_SHIFT)
#define TWL6030_CFG_STATE_APP(v) (((v) & TWL6030_CFG_STATE_APP_MASK) >>\
TWL6030_CFG_STATE_APP_SHIFT)
/* Flags for SMPS Voltage reading and LDO reading*/
#define SMPS_OFFSET_EN BIT(0)
#define SMPS_EXTENDED_EN BIT(1)
#define TWL_6030_WARM_RESET BIT(3)
/* twl6032 SMPS EPROM values */
#define TWL6030_SMPS_OFFSET 0xB0
#define TWL6030_SMPS_MULT 0xB3
#define SMPS_MULTOFFSET_SMPS4 BIT(0)
#define SMPS_MULTOFFSET_VIO BIT(1)
#define SMPS_MULTOFFSET_SMPS3 BIT(6)
static inline int
twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
{
u8 value;
int status;
status = twl_i2c_read_u8(slave_subgp,
&value, info->base + offset);
return (status < 0) ? status : value;
}
static inline int
twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
u8 value)
{
return twl_i2c_write_u8(slave_subgp,
value, info->base + offset);
}
/* generic power resource operations, which work on all regulators */
static int twlreg_grp(struct regulator_dev *rdev)
{
return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
VREG_GRP);
}
/*
* Enable/disable regulators by joining/leaving the P1 (processor) group.
* We assume nobody else is updating the DEV_GRP registers.
*/
/* definition for 6030 family */
#define P3_GRP_6030 BIT(2) /* secondary processor, modem, etc */
#define P2_GRP_6030 BIT(1) /* "peripherals" */
#define P1_GRP_6030 BIT(0) /* CPU/Linux */
static int twl6030reg_is_enabled(struct regulator_dev *rdev)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int grp = 0, val;
if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS))) {
grp = twlreg_grp(rdev);
if (grp < 0)
return grp;
grp &= P1_GRP_6030;
val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
val = TWL6030_CFG_STATE_APP(val);
} else {
val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
val &= TWL6030_CFG_STATE_MASK;
grp = 1;
}
return grp && (val == TWL6030_CFG_STATE_ON);
}
#define PB_I2C_BUSY BIT(0)
#define PB_I2C_BWEN BIT(1)
static int twl6030reg_enable(struct regulator_dev *rdev)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int grp = 0;
int ret;
if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS)))
grp = twlreg_grp(rdev);
if (grp < 0)
return grp;
ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
grp << TWL6030_CFG_STATE_GRP_SHIFT |
TWL6030_CFG_STATE_ON);
return ret;
}
static int twl6030reg_disable(struct regulator_dev *rdev)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int grp = 0;
int ret;
if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS)))
grp = P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030;
/* For 6030, set the off state for all grps enabled */
ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
(grp) << TWL6030_CFG_STATE_GRP_SHIFT |
TWL6030_CFG_STATE_OFF);
return ret;
}
static int twl6030reg_get_status(struct regulator_dev *rdev)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int val;
val = twlreg_grp(rdev);
if (val < 0)
return val;
val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
if (info->features & TWL6032_SUBCLASS)
val &= TWL6030_CFG_STATE_MASK;
else
val = TWL6030_CFG_STATE_APP(val);
switch (val) {
case TWL6030_CFG_STATE_ON:
return REGULATOR_STATUS_NORMAL;
case TWL6030_CFG_STATE_SLEEP:
return REGULATOR_STATUS_STANDBY;
case TWL6030_CFG_STATE_OFF:
case TWL6030_CFG_STATE_OFF2:
default:
break;
}
return REGULATOR_STATUS_OFF;
}
static int twl6030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int grp = 0;
int val;
if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS)))
grp = twlreg_grp(rdev);
if (grp < 0)
return grp;
/* Compose the state register settings */
val = grp << TWL6030_CFG_STATE_GRP_SHIFT;
/* We can only set the mode through state machine commands... */
switch (mode) {
case REGULATOR_MODE_NORMAL:
val |= TWL6030_CFG_STATE_ON;
break;
case REGULATOR_MODE_STANDBY:
val |= TWL6030_CFG_STATE_SLEEP;
break;
default:
return -EINVAL;
}
return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE, val);
}
static int twl6030coresmps_set_voltage(struct regulator_dev *rdev, int min_uV,
int max_uV, unsigned *selector)
{
return -ENODEV;
}
static int twl6030coresmps_get_voltage(struct regulator_dev *rdev)
{
return -ENODEV;
}
static const struct regulator_ops twl6030coresmps_ops = {
.set_voltage = twl6030coresmps_set_voltage,
.get_voltage = twl6030coresmps_get_voltage,
};
static int
twl6030ldo_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
if (info->flags & TWL_6030_WARM_RESET)
selector |= TWL6030_VREG_VOLTAGE_WR_S;
return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE,
selector);
}
static int twl6030ldo_get_voltage_sel(struct regulator_dev *rdev)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE);
if (info->flags & TWL_6030_WARM_RESET)
vsel &= ~TWL6030_VREG_VOLTAGE_WR_S;
return vsel;
}
static const struct regulator_ops twl6030ldo_ops = {
.list_voltage = regulator_list_voltage_linear_range,
.set_voltage_sel = twl6030ldo_set_voltage_sel,
.get_voltage_sel = twl6030ldo_get_voltage_sel,
.enable = twl6030reg_enable,
.disable = twl6030reg_disable,
.is_enabled = twl6030reg_is_enabled,
.set_mode = twl6030reg_set_mode,
.get_status = twl6030reg_get_status,
};
static const struct regulator_ops twl6030fixed_ops = {
.list_voltage = regulator_list_voltage_linear,
.enable = twl6030reg_enable,
.disable = twl6030reg_disable,
.is_enabled = twl6030reg_is_enabled,
.set_mode = twl6030reg_set_mode,
.get_status = twl6030reg_get_status,
};
/*
* SMPS status and control
*/
static int twl6030smps_list_voltage(struct regulator_dev *rdev, unsigned index)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int voltage = 0;
switch (info->flags) {
case SMPS_OFFSET_EN:
voltage = 100000;
fallthrough;
case 0:
switch (index) {
case 0:
voltage = 0;
break;
case 58:
voltage = 1350 * 1000;
break;
case 59:
voltage = 1500 * 1000;
break;
case 60:
voltage = 1800 * 1000;
break;
case 61:
voltage = 1900 * 1000;
break;
case 62:
voltage = 2100 * 1000;
break;
default:
voltage += (600000 + (12500 * (index - 1)));
}
break;
case SMPS_EXTENDED_EN:
switch (index) {
case 0:
voltage = 0;
break;
case 58:
voltage = 2084 * 1000;
break;
case 59:
voltage = 2315 * 1000;
break;
case 60:
voltage = 2778 * 1000;
break;
case 61:
voltage = 2932 * 1000;
break;
case 62:
voltage = 3241 * 1000;
break;
default:
voltage = (1852000 + (38600 * (index - 1)));
}
break;
case SMPS_OFFSET_EN | SMPS_EXTENDED_EN:
switch (index) {
case 0:
voltage = 0;
break;
case 58:
voltage = 4167 * 1000;
break;
case 59:
voltage = 2315 * 1000;
break;
case 60:
voltage = 2778 * 1000;
break;
case 61:
voltage = 2932 * 1000;
break;
case 62:
voltage = 3241 * 1000;
break;
default:
voltage = (2161000 + (38600 * (index - 1)));
}
break;
}
return voltage;
}
static int twl6030smps_map_voltage(struct regulator_dev *rdev, int min_uV,
int max_uV)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int vsel = 0;
switch (info->flags) {
case 0:
if (min_uV == 0)
vsel = 0;
else if ((min_uV >= 600000) && (min_uV <= 1300000)) {
vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
vsel++;
}
/* Values 1..57 for vsel are linear and can be calculated
* values 58..62 are non linear.
*/
else if ((min_uV > 1900000) && (min_uV <= 2100000))
vsel = 62;
else if ((min_uV > 1800000) && (min_uV <= 1900000))
vsel = 61;
else if ((min_uV > 1500000) && (min_uV <= 1800000))
vsel = 60;
else if ((min_uV > 1350000) && (min_uV <= 1500000))
vsel = 59;
else if ((min_uV > 1300000) && (min_uV <= 1350000))
vsel = 58;
else
return -EINVAL;
break;
case SMPS_OFFSET_EN:
if (min_uV == 0)
vsel = 0;
else if ((min_uV >= 700000) && (min_uV <= 1420000)) {
vsel = DIV_ROUND_UP(min_uV - 700000, 12500);
vsel++;
}
/* Values 1..57 for vsel are linear and can be calculated
* values 58..62 are non linear.
*/
else if ((min_uV > 1900000) && (min_uV <= 2100000))
vsel = 62;
else if ((min_uV > 1800000) && (min_uV <= 1900000))
vsel = 61;
else if ((min_uV > 1500000) && (min_uV <= 1800000))
vsel = 60;
else if ((min_uV > 1350000) && (min_uV <= 1500000))
vsel = 59;
else
return -EINVAL;
break;
case SMPS_EXTENDED_EN:
if (min_uV == 0) {
vsel = 0;
} else if ((min_uV >= 1852000) && (max_uV <= 4013600)) {
vsel = DIV_ROUND_UP(min_uV - 1852000, 38600);
vsel++;
}
break;
case SMPS_OFFSET_EN|SMPS_EXTENDED_EN:
if (min_uV == 0) {
vsel = 0;
} else if ((min_uV >= 2161000) && (min_uV <= 4321000)) {
vsel = DIV_ROUND_UP(min_uV - 2161000, 38600);
vsel++;
}
break;
}
return vsel;
}
static int twl6030smps_set_voltage_sel(struct regulator_dev *rdev,
unsigned int selector)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS,
selector);
}
static int twl6030smps_get_voltage_sel(struct regulator_dev *rdev)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
return twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS);
}
static const struct regulator_ops twlsmps_ops = {
.list_voltage = twl6030smps_list_voltage,
.map_voltage = twl6030smps_map_voltage,
.set_voltage_sel = twl6030smps_set_voltage_sel,
.get_voltage_sel = twl6030smps_get_voltage_sel,
.enable = twl6030reg_enable,
.disable = twl6030reg_disable,
.is_enabled = twl6030reg_is_enabled,
.set_mode = twl6030reg_set_mode,
.get_status = twl6030reg_get_status,
};
/*----------------------------------------------------------------------*/
static const struct linear_range twl6030ldo_linear_range[] = {
REGULATOR_LINEAR_RANGE(0, 0, 0, 0),
REGULATOR_LINEAR_RANGE(1000000, 1, 24, 100000),
REGULATOR_LINEAR_RANGE(2750000, 31, 31, 0),
};
#define TWL6030_ADJUSTABLE_SMPS(label) \
static const struct twlreg_info TWL6030_INFO_##label = { \
.desc = { \
.name = #label, \
.id = TWL6030_REG_##label, \
.ops = &twl6030coresmps_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}, \
}
#define TWL6030_ADJUSTABLE_LDO(label, offset) \
static const struct twlreg_info TWL6030_INFO_##label = { \
.base = offset, \
.desc = { \
.name = #label, \
.id = TWL6030_REG_##label, \
.n_voltages = 32, \
.linear_ranges = twl6030ldo_linear_range, \
.n_linear_ranges = ARRAY_SIZE(twl6030ldo_linear_range), \
.ops = &twl6030ldo_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}, \
}
#define TWL6032_ADJUSTABLE_LDO(label, offset) \
static const struct twlreg_info TWL6032_INFO_##label = { \
.base = offset, \
.features = TWL6032_SUBCLASS, \
.desc = { \
.name = #label, \
.id = TWL6032_REG_##label, \
.n_voltages = 32, \
.linear_ranges = twl6030ldo_linear_range, \
.n_linear_ranges = ARRAY_SIZE(twl6030ldo_linear_range), \
.ops = &twl6030ldo_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}, \
}
#define TWL6030_FIXED_LDO(label, offset, mVolts, turnon_delay) \
static const struct twlreg_info TWLFIXED_INFO_##label = { \
.base = offset, \
.id = 0, \
.desc = { \
.name = #label, \
.id = TWL6030##_REG_##label, \
.n_voltages = 1, \
.ops = &twl6030fixed_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = mVolts * 1000, \
.enable_time = turnon_delay, \
.of_map_mode = NULL, \
}, \
}
#define TWL6032_ADJUSTABLE_SMPS(label, offset) \
static const struct twlreg_info TWLSMPS_INFO_##label = { \
.base = offset, \
.features = TWL6032_SUBCLASS, \
.desc = { \
.name = #label, \
.id = TWL6032_REG_##label, \
.n_voltages = 63, \
.ops = &twlsmps_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}, \
}
/* VUSBCP is managed *only* by the USB subchip */
/* 6030 REG with base as PMC Slave Misc : 0x0030 */
/* Turnon-delay and remap configuration values for 6030 are not
verified since the specification is not public */
TWL6030_ADJUSTABLE_SMPS(VDD1);
TWL6030_ADJUSTABLE_SMPS(VDD2);
TWL6030_ADJUSTABLE_SMPS(VDD3);
TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54);
TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58);
TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c);
TWL6030_ADJUSTABLE_LDO(VMMC, 0x68);
TWL6030_ADJUSTABLE_LDO(VPP, 0x6c);
TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74);
/* 6025 are renamed compared to 6030 versions */
TWL6032_ADJUSTABLE_LDO(LDO2, 0x54);
TWL6032_ADJUSTABLE_LDO(LDO4, 0x58);
TWL6032_ADJUSTABLE_LDO(LDO3, 0x5c);
TWL6032_ADJUSTABLE_LDO(LDO5, 0x68);
TWL6032_ADJUSTABLE_LDO(LDO1, 0x6c);
TWL6032_ADJUSTABLE_LDO(LDO7, 0x74);
TWL6032_ADJUSTABLE_LDO(LDO6, 0x60);
TWL6032_ADJUSTABLE_LDO(LDOLN, 0x64);
TWL6032_ADJUSTABLE_LDO(LDOUSB, 0x70);
TWL6030_FIXED_LDO(VANA, 0x50, 2100, 0);
TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 0);
TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 0);
TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 0);
TWL6030_FIXED_LDO(V1V8, 0x16, 1800, 0);
TWL6030_FIXED_LDO(V2V1, 0x1c, 2100, 0);
TWL6032_ADJUSTABLE_SMPS(SMPS3, 0x34);
TWL6032_ADJUSTABLE_SMPS(SMPS4, 0x10);
TWL6032_ADJUSTABLE_SMPS(VIO, 0x16);
static u8 twl_get_smps_offset(void)
{
u8 value;
twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
TWL6030_SMPS_OFFSET);
return value;
}
static u8 twl_get_smps_mult(void)
{
u8 value;
twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
TWL6030_SMPS_MULT);
return value;
}
#define TWL_OF_MATCH(comp, family, label) \
{ \
.compatible = comp, \
.data = &family##_INFO_##label, \
}
#define TWL6030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6030, label)
#define TWL6032_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6032, label)
#define TWLFIXED_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLFIXED, label)
#define TWLSMPS_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLSMPS, label)
static const struct of_device_id twl_of_match[] = {
TWL6030_OF_MATCH("ti,twl6030-vdd1", VDD1),
TWL6030_OF_MATCH("ti,twl6030-vdd2", VDD2),
TWL6030_OF_MATCH("ti,twl6030-vdd3", VDD3),
TWL6030_OF_MATCH("ti,twl6030-vaux1", VAUX1_6030),
TWL6030_OF_MATCH("ti,twl6030-vaux2", VAUX2_6030),
TWL6030_OF_MATCH("ti,twl6030-vaux3", VAUX3_6030),
TWL6030_OF_MATCH("ti,twl6030-vmmc", VMMC),
TWL6030_OF_MATCH("ti,twl6030-vpp", VPP),
TWL6030_OF_MATCH("ti,twl6030-vusim", VUSIM),
TWL6032_OF_MATCH("ti,twl6032-ldo2", LDO2),
TWL6032_OF_MATCH("ti,twl6032-ldo4", LDO4),
TWL6032_OF_MATCH("ti,twl6032-ldo3", LDO3),
TWL6032_OF_MATCH("ti,twl6032-ldo5", LDO5),
TWL6032_OF_MATCH("ti,twl6032-ldo1", LDO1),
TWL6032_OF_MATCH("ti,twl6032-ldo7", LDO7),
TWL6032_OF_MATCH("ti,twl6032-ldo6", LDO6),
TWL6032_OF_MATCH("ti,twl6032-ldoln", LDOLN),
TWL6032_OF_MATCH("ti,twl6032-ldousb", LDOUSB),
TWLFIXED_OF_MATCH("ti,twl6030-vana", VANA),
TWLFIXED_OF_MATCH("ti,twl6030-vcxio", VCXIO),
TWLFIXED_OF_MATCH("ti,twl6030-vdac", VDAC),
TWLFIXED_OF_MATCH("ti,twl6030-vusb", VUSB),
TWLFIXED_OF_MATCH("ti,twl6030-v1v8", V1V8),
TWLFIXED_OF_MATCH("ti,twl6030-v2v1", V2V1),
TWLSMPS_OF_MATCH("ti,twl6032-smps3", SMPS3),
TWLSMPS_OF_MATCH("ti,twl6032-smps4", SMPS4),
TWLSMPS_OF_MATCH("ti,twl6032-vio", VIO),
{},
};
MODULE_DEVICE_TABLE(of, twl_of_match);
static int twlreg_probe(struct platform_device *pdev)
{
int id;
struct twlreg_info *info;
const struct twlreg_info *template;
struct regulator_init_data *initdata;
struct regulation_constraints *c;
struct regulator_dev *rdev;
struct regulator_config config = { };
struct device_node *np = pdev->dev.of_node;
template = of_device_get_match_data(&pdev->dev);
if (!template)
return -ENODEV;
id = template->desc.id;
initdata = of_get_regulator_init_data(&pdev->dev, np, &template->desc);
if (!initdata)
return -EINVAL;
info = devm_kmemdup(&pdev->dev, template, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
/* Constrain board-specific capabilities according to what
* this driver and the chip itself can actually do.
*/
c = &initdata->constraints;
c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
| REGULATOR_CHANGE_MODE
| REGULATOR_CHANGE_STATUS;
switch (id) {
case TWL6032_REG_SMPS3:
if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS3)
info->flags |= SMPS_EXTENDED_EN;
if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS3)
info->flags |= SMPS_OFFSET_EN;
break;
case TWL6032_REG_SMPS4:
if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS4)
info->flags |= SMPS_EXTENDED_EN;
if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS4)
info->flags |= SMPS_OFFSET_EN;
break;
case TWL6032_REG_VIO:
if (twl_get_smps_mult() & SMPS_MULTOFFSET_VIO)
info->flags |= SMPS_EXTENDED_EN;
if (twl_get_smps_offset() & SMPS_MULTOFFSET_VIO)
info->flags |= SMPS_OFFSET_EN;
break;
}
if (of_property_read_bool(np, "ti,retain-on-reset"))
info->flags |= TWL_6030_WARM_RESET;
config.dev = &pdev->dev;
config.init_data = initdata;
config.driver_data = info;
config.of_node = np;
rdev = devm_regulator_register(&pdev->dev, &info->desc, &config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "can't register %s, %ld\n",
info->desc.name, PTR_ERR(rdev));
return PTR_ERR(rdev);
}
platform_set_drvdata(pdev, rdev);
/* NOTE: many regulators support short-circuit IRQs (presentable
* as REGULATOR_OVER_CURRENT notifications?) configured via:
* - SC_CONFIG
* - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
* - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
* - IT_CONFIG
*/
return 0;
}
MODULE_ALIAS("platform:twl6030_reg");
static struct platform_driver twlreg_driver = {
.probe = twlreg_probe,
/* NOTE: short name, to work around driver model truncation of
* "twl_regulator.12" (and friends) to "twl_regulator.1".
*/
.driver = {
.name = "twl6030_reg",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = of_match_ptr(twl_of_match),
},
};
static int __init twlreg_init(void)
{
return platform_driver_register(&twlreg_driver);
}
subsys_initcall(twlreg_init);
static void __exit twlreg_exit(void)
{
platform_driver_unregister(&twlreg_driver);
}
module_exit(twlreg_exit)
MODULE_DESCRIPTION("TWL6030 regulator driver");
MODULE_LICENSE("GPL");
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