/*
* Driver for Regulator part of Palmas PMIC Chips
*
* Copyright 2011-2012 Texas Instruments Inc.
*
* Author: Graeme Gregory <gg@slimlogic.co.uk>
*
* 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.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#include <linux/mfd/palmas.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/regulator/of_regulator.h>
struct regs_info {
char *name;
u8 vsel_addr;
u8 ctrl_addr;
u8 tstep_addr;
};
static const struct regs_info palmas_regs_info[] = {
{
.name = "SMPS12",
.vsel_addr = PALMAS_SMPS12_VOLTAGE,
.ctrl_addr = PALMAS_SMPS12_CTRL,
.tstep_addr = PALMAS_SMPS12_TSTEP,
},
{
.name = "SMPS123",
.vsel_addr = PALMAS_SMPS12_VOLTAGE,
.ctrl_addr = PALMAS_SMPS12_CTRL,
.tstep_addr = PALMAS_SMPS12_TSTEP,
},
{
.name = "SMPS3",
.vsel_addr = PALMAS_SMPS3_VOLTAGE,
.ctrl_addr = PALMAS_SMPS3_CTRL,
},
{
.name = "SMPS45",
.vsel_addr = PALMAS_SMPS45_VOLTAGE,
.ctrl_addr = PALMAS_SMPS45_CTRL,
.tstep_addr = PALMAS_SMPS45_TSTEP,
},
{
.name = "SMPS457",
.vsel_addr = PALMAS_SMPS45_VOLTAGE,
.ctrl_addr = PALMAS_SMPS45_CTRL,
.tstep_addr = PALMAS_SMPS45_TSTEP,
},
{
.name = "SMPS6",
.vsel_addr = PALMAS_SMPS6_VOLTAGE,
.ctrl_addr = PALMAS_SMPS6_CTRL,
.tstep_addr = PALMAS_SMPS6_TSTEP,
},
{
.name = "SMPS7",
.vsel_addr = PALMAS_SMPS7_VOLTAGE,
.ctrl_addr = PALMAS_SMPS7_CTRL,
},
{
.name = "SMPS8",
.vsel_addr = PALMAS_SMPS8_VOLTAGE,
.ctrl_addr = PALMAS_SMPS8_CTRL,
.tstep_addr = PALMAS_SMPS8_TSTEP,
},
{
.name = "SMPS9",
.vsel_addr = PALMAS_SMPS9_VOLTAGE,
.ctrl_addr = PALMAS_SMPS9_CTRL,
},
{
.name = "SMPS10",
},
{
.name = "LDO1",
.vsel_addr = PALMAS_LDO1_VOLTAGE,
.ctrl_addr = PALMAS_LDO1_CTRL,
},
{
.name = "LDO2",
.vsel_addr = PALMAS_LDO2_VOLTAGE,
.ctrl_addr = PALMAS_LDO2_CTRL,
},
{
.name = "LDO3",
.vsel_addr = PALMAS_LDO3_VOLTAGE,
.ctrl_addr = PALMAS_LDO3_CTRL,
},
{
.name = "LDO4",
.vsel_addr = PALMAS_LDO4_VOLTAGE,
.ctrl_addr = PALMAS_LDO4_CTRL,
},
{
.name = "LDO5",
.vsel_addr = PALMAS_LDO5_VOLTAGE,
.ctrl_addr = PALMAS_LDO5_CTRL,
},
{
.name = "LDO6",
.vsel_addr = PALMAS_LDO6_VOLTAGE,
.ctrl_addr = PALMAS_LDO6_CTRL,
},
{
.name = "LDO7",
.vsel_addr = PALMAS_LDO7_VOLTAGE,
.ctrl_addr = PALMAS_LDO7_CTRL,
},
{
.name = "LDO8",
.vsel_addr = PALMAS_LDO8_VOLTAGE,
.ctrl_addr = PALMAS_LDO8_CTRL,
},
{
.name = "LDO9",
.vsel_addr = PALMAS_LDO9_VOLTAGE,
.ctrl_addr = PALMAS_LDO9_CTRL,
},
{
.name = "LDOLN",
.vsel_addr = PALMAS_LDOLN_VOLTAGE,
.ctrl_addr = PALMAS_LDOLN_CTRL,
},
{
.name = "LDOUSB",
.vsel_addr = PALMAS_LDOUSB_VOLTAGE,
.ctrl_addr = PALMAS_LDOUSB_CTRL,
},
};
#define SMPS_CTRL_MODE_OFF 0x00
#define SMPS_CTRL_MODE_ON 0x01
#define SMPS_CTRL_MODE_ECO 0x02
#define SMPS_CTRL_MODE_PWM 0x03
/* These values are derived from the data sheet. And are the number of steps
* where there is a voltage change, the ranges at beginning and end of register
* max/min values where there are no change are ommitted.
*
* So they are basically (maxV-minV)/stepV
*/
#define PALMAS_SMPS_NUM_VOLTAGES 116
#define PALMAS_SMPS10_NUM_VOLTAGES 2
#define PALMAS_LDO_NUM_VOLTAGES 50
#define SMPS10_VSEL (1<<3)
#define SMPS10_BOOST_EN (1<<2)
#define SMPS10_BYPASS_EN (1<<1)
#define SMPS10_SWITCH_EN (1<<0)
#define REGULATOR_SLAVE 0
static int palmas_smps_read(struct palmas *palmas, unsigned int reg,
unsigned int *dest)
{
unsigned int addr;
addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
}
static int palmas_smps_write(struct palmas *palmas, unsigned int reg,
unsigned int value)
{
unsigned int addr;
addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
}
static int palmas_ldo_read(struct palmas *palmas, unsigned int reg,
unsigned int *dest)
{
unsigned int addr;
addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
}
static int palmas_ldo_write(struct palmas *palmas, unsigned int reg,
unsigned int value)
{
unsigned int addr;
addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
}
static int palmas_is_enabled_smps(struct regulator_dev *dev)
{
struct palmas_pmic *pmic = rdev_get_drvdata(dev);
int id = rdev_get_id(dev);
unsigned int reg;
palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®);
reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
return !!(reg);
}
static int palmas_enable_smps(struct regulator_dev *dev)
{
struct palmas_pmic *pmic = rdev_get_drvdata(dev);
int id = rdev_get_id(dev);
unsigned int reg;
palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®);
reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
reg |= SMPS_CTRL_MODE_ON;
palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
return 0;
}
static int palmas_disable_smps(struct regulator_dev *dev)
{
struct palmas_pmic *pmic = rdev_get_drvdata(dev);
int id = rdev_get_id(dev);
unsigned int reg;
palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®);
reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
return 0;
}
static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
{
struct palmas_pmic *pmic = rdev_get_drvdata(dev);
int id = rdev_get_id(dev);
unsigned int reg;
palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®);
reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
switch (mode) {
case REGULATOR_MODE_NORMAL:
reg |= SMPS_CTRL_MODE_ON;
break;
case REGULATOR_MODE_IDLE:
reg |= SMPS_CTRL_MODE_ECO;
break;
case REGULATOR_MODE_FAST:
reg |= SMPS_CTRL_MODE_PWM;
break;
default:
return -EINVAL;
}
palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
return 0;
}
static unsigned int palmas_get_mode_smps(struct regulator_dev *dev)
{
struct palmas_pmic *pmic = rdev_get_drvdata(dev);
int id = rdev_get_id(dev);
unsigned int reg;
palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®);
reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
switch (reg) {
case SMPS_CTRL_MODE_ON:
return REGULATOR_MODE_NORMAL;
case SMPS_CTRL_MODE_ECO:
return REGULATOR_MODE_IDLE;
case SMPS_CTRL_MODE_PWM:
return REGULATOR_MODE_FAST;
}
return 0;
}
static int palmas_list_voltage_smps(struct regulator_dev *dev,
unsigned selector)
{
struct palmas_pmic *pmic = rdev_get_drvdata(dev);
int id = rdev_get_id(dev);
int mult = 1;
/* Read the multiplier set in VSEL register to return
* the correct voltage.
*/
if (pmic->range[id])
mult = 2;
if (selector == 0)
return 0;
else if (selector < 6)
return 500000 * mult;
else
/* Voltage is linear mapping starting from selector 6,
* volt = (0.49V + ((selector - 5) * 0.01V)) * RANGE
* RANGE is either x1 or x2
*/
return (490000 + ((selector - 5) * 10000)) * mult;
}
static int palmas_map_voltage_smps(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
int ret, voltage;
if (min_uV == 0)
return 0;
if (pmic->range[id]) { /* RANGE is x2 */
if (min_uV < 1000000)
min_uV = 1000000;
ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 6;
} else { /* RANGE is x1 */
if (min_uV < 500000)
min_uV = 500000;
ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 6;
}
/* Map back into a voltage to verify we're still in bounds */
voltage = palmas_list_voltage_smps(rdev, ret);
if (voltage < min_uV || voltage > max_uV)
return -EINVAL;
return ret;
}
static struct regulator_ops palmas_ops_smps = {
.is_enabled = palmas_is_enabled_smps,
.enable = palmas_enable_smps,
.disable = palmas_disable_smps,
.set_mode = palmas_set_mode_smps,
.get_mode = palmas_get_mode_smps,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = palmas_list_voltage_smps,
.map_voltage = palmas_map_voltage_smps,
};
static struct regulator_ops palmas_ops_smps10 = {
.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,
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
};
static int palmas_is_enabled_ldo(struct regulator_dev *dev)
{
struct palmas_pmic *pmic = rdev_get_drvdata(dev);
int id = rdev_get_id(dev);
unsigned int reg;
palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®);
reg &= PALMAS_LDO1_CTRL_STATUS;
return !!(reg);
}
static struct regulator_ops palmas_ops_ldo = {
.is_enabled = palmas_is_enabled_ldo,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
};
/*
* setup the hardware based sleep configuration of the SMPS/LDO regulators
* from the platform data. This is different to the software based control
* supported by the regulator framework as it is controlled by toggling
* pins on the PMIC such as PREQ, SYSEN, ...
*/
static int palmas_smps_init(struct palmas *palmas, int id,
struct palmas_reg_init *reg_init)
{
unsigned int reg;
unsigned int addr;
int ret;
addr = palmas_regs_info[id].ctrl_addr;
ret = palmas_smps_read(palmas, addr, ®);
if (ret)
return ret;
switch (id) {
case PALMAS_REG_SMPS10:
if (reg_init->mode_sleep) {
reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK;
reg |= reg_init->mode_sleep <<
PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT;
}
break;
default:
if (reg_init->warm_reset)
reg |= PALMAS_SMPS12_CTRL_WR_S;
if (reg_init->roof_floor)
reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
if (reg_init->mode_sleep) {
reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK;
reg |= reg_init->mode_sleep <<
PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT;
}
}
ret = palmas_smps_write(palmas, addr, reg);
if (ret)
return ret;
if (palmas_regs_info[id].tstep_addr && reg_init->tstep) {
addr = palmas_regs_info[id].tstep_addr;
reg = reg_init->tstep & PALMAS_SMPS12_TSTEP_TSTEP_MASK;
ret = palmas_smps_write(palmas, addr, reg);
if (ret)
return ret;
}
if (palmas_regs_info[id].vsel_addr && reg_init->vsel) {
addr = palmas_regs_info[id].vsel_addr;
reg = reg_init->vsel;
ret = palmas_smps_write(palmas, addr, reg);
if (ret)
return ret;
}
return 0;
}
static int palmas_ldo_init(struct palmas *palmas, int id,
struct palmas_reg_init *reg_init)
{
unsigned int reg;
unsigned int addr;
int ret;
addr = palmas_regs_info[id].ctrl_addr;
ret = palmas_ldo_read(palmas, addr, ®);
if (ret)
return ret;
if (reg_init->warm_reset)
reg |= PALMAS_LDO1_CTRL_WR_S;
if (reg_init->mode_sleep)
reg |= PALMAS_LDO1_CTRL_MODE_SLEEP;
ret = palmas_ldo_write(palmas, addr, reg);
if (ret)
return ret;
return 0;
}
static struct of_regulator_match palmas_matches[] = {
{ .name = "smps12", },
{ .name = "smps123", },
{ .name = "smps3", },
{ .name = "smps45", },
{ .name = "smps457", },
{ .name = "smps6", },
{ .name = "smps7", },
{ .name = "smps8", },
{ .name = "smps9", },
{ .name = "smps10", },
{ .name = "ldo1", },
{ .name = "ldo2", },
{ .name = "ldo3", },
{ .name = "ldo4", },
{ .name = "ldo5", },
{ .name = "ldo6", },
{ .name = "ldo7", },
{ .name = "ldo8", },
{ .name = "ldo9", },
{ .name = "ldoln", },
{ .name = "ldousb", },
};
static void palmas_dt_to_pdata(struct device *dev,
struct device_node *node,
struct palmas_pmic_platform_data *pdata)
{
struct device_node *regulators;
u32 prop;
int idx, ret;
node = of_node_get(node);
regulators = of_find_node_by_name(node, "regulators");
if (!regulators) {
dev_info(dev, "regulator node not found\n");
return;
}
ret = of_regulator_match(dev, regulators, palmas_matches,
PALMAS_NUM_REGS);
of_node_put(regulators);
if (ret < 0) {
dev_err(dev, "Error parsing regulator init data: %d\n", ret);
return;
}
for (idx = 0; idx < PALMAS_NUM_REGS; idx++) {
if (!palmas_matches[idx].init_data ||
!palmas_matches[idx].of_node)
continue;
pdata->reg_data[idx] = palmas_matches[idx].init_data;
pdata->reg_init[idx] = devm_kzalloc(dev,
sizeof(struct palmas_reg_init), GFP_KERNEL);
ret = of_property_read_u32(palmas_matches[idx].of_node,
"ti,warm_reset", &prop);
if (!ret)
pdata->reg_init[idx]->warm_reset = prop;
ret = of_property_read_u32(palmas_matches[idx].of_node,
"ti,roof_floor", &prop);
if (!ret)
pdata->reg_init[idx]->roof_floor = prop;
ret = of_property_read_u32(palmas_matches[idx].of_node,
"ti,mode_sleep", &prop);
if (!ret)
pdata->reg_init[idx]->mode_sleep = prop;
ret = of_property_read_u32(palmas_matches[idx].of_node,
"ti,tstep", &prop);
if (!ret)
pdata->reg_init[idx]->tstep = prop;
ret = of_property_read_u32(palmas_matches[idx].of_node,
"ti,vsel", &prop);
if (!ret)
pdata->reg_init[idx]->vsel = prop;
}
ret = of_property_read_u32(node, "ti,ldo6_vibrator", &prop);
if (!ret)
pdata->ldo6_vibrator = prop;
}
static int palmas_probe(struct platform_device *pdev)
{
struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
struct palmas_pmic_platform_data *pdata = pdev->dev.platform_data;
struct device_node *node = pdev->dev.of_node;
struct regulator_dev *rdev;
struct regulator_config config = { };
struct palmas_pmic *pmic;
struct palmas_reg_init *reg_init;
int id = 0, ret;
unsigned int addr, reg;
if (node && !pdata) {
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
palmas_dt_to_pdata(&pdev->dev, node, pdata);
}
pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
if (!pmic)
return -ENOMEM;
pmic->dev = &pdev->dev;
pmic->palmas = palmas;
palmas->pmic = pmic;
platform_set_drvdata(pdev, pmic);
ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, ®);
if (ret)
return ret;
if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN)
pmic->smps123 = 1;
if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN)
pmic->smps457 = 1;
config.regmap = palmas->regmap[REGULATOR_SLAVE];
config.dev = &pdev->dev;
config.driver_data = pmic;
for (id = 0; id < PALMAS_REG_LDO1; id++) {
/*
* Miss out regulators which are not available due
* to slaving configurations.
*/
switch (id) {
case PALMAS_REG_SMPS12:
case PALMAS_REG_SMPS3:
if (pmic->smps123)
continue;
break;
case PALMAS_REG_SMPS123:
if (!pmic->smps123)
continue;
break;
case PALMAS_REG_SMPS45:
case PALMAS_REG_SMPS7:
if (pmic->smps457)
continue;
break;
case PALMAS_REG_SMPS457:
if (!pmic->smps457)
continue;
}
/* Initialise sleep/init values from platform data */
if (pdata && pdata->reg_init[id]) {
reg_init = pdata->reg_init[id];
ret = palmas_smps_init(palmas, id, reg_init);
if (ret)
goto err_unregister_regulator;
}
/* Register the regulators */
pmic->desc[id].name = palmas_regs_info[id].name;
pmic->desc[id].id = id;
switch (id) {
case PALMAS_REG_SMPS10:
pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES;
pmic->desc[id].ops = &palmas_ops_smps10;
pmic->desc[id].vsel_reg =
PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
PALMAS_SMPS10_CTRL);
pmic->desc[id].vsel_mask = SMPS10_VSEL;
pmic->desc[id].enable_reg =
PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
PALMAS_SMPS10_STATUS);
pmic->desc[id].enable_mask = SMPS10_BOOST_EN;
pmic->desc[id].min_uV = 3750000;
pmic->desc[id].uV_step = 1250000;
break;
default:
/*
* Read and store the RANGE bit for later use
* This must be done before regulator is probed,
* otherwise we error in probe with unsupportable ranges.
*/
addr = palmas_regs_info[id].vsel_addr;
ret = palmas_smps_read(pmic->palmas, addr, ®);
if (ret)
goto err_unregister_regulator;
if (reg & PALMAS_SMPS12_VOLTAGE_RANGE)
pmic->range[id] = 1;
pmic->desc[id].ops = &palmas_ops_smps;
pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES;
pmic->desc[id].vsel_reg =
PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
palmas_regs_info[id].vsel_addr);
pmic->desc[id].vsel_mask =
PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
}
pmic->desc[id].type = REGULATOR_VOLTAGE;
pmic->desc[id].owner = THIS_MODULE;
if (pdata)
config.init_data = pdata->reg_data[id];
else
config.init_data = NULL;
config.of_node = palmas_matches[id].of_node;
rdev = regulator_register(&pmic->desc[id], &config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev,
"failed to register %s regulator\n",
pdev->name);
ret = PTR_ERR(rdev);
goto err_unregister_regulator;
}
/* Save regulator for cleanup */
pmic->rdev[id] = rdev;
}
/* Start this loop from the id left from previous loop */
for (; id < PALMAS_NUM_REGS; id++) {
/* Miss out regulators which are not available due
* to alternate functions.
*/
/* Register the regulators */
pmic->desc[id].name = palmas_regs_info[id].name;
pmic->desc[id].id = id;
pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;
pmic->desc[id].ops = &palmas_ops_ldo;
pmic->desc[id].type = REGULATOR_VOLTAGE;
pmic->desc[id].owner = THIS_MODULE;
pmic->desc[id].min_uV = 900000;
pmic->desc[id].uV_step = 50000;
pmic->desc[id].linear_min_sel = 1;
pmic->desc[id].vsel_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
palmas_regs_info[id].vsel_addr);
pmic->desc[id].vsel_mask = PALMAS_LDO1_VOLTAGE_VSEL_MASK;
pmic->desc[id].enable_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
palmas_regs_info[id].ctrl_addr);
pmic->desc[id].enable_mask = PALMAS_LDO1_CTRL_MODE_ACTIVE;
if (pdata)
config.init_data = pdata->reg_data[id];
else
config.init_data = NULL;
config.of_node = palmas_matches[id].of_node;
rdev = regulator_register(&pmic->desc[id], &config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev,
"failed to register %s regulator\n",
pdev->name);
ret = PTR_ERR(rdev);
goto err_unregister_regulator;
}
/* Save regulator for cleanup */
pmic->rdev[id] = rdev;
/* Initialise sleep/init values from platform data */
if (pdata) {
reg_init = pdata->reg_init[id];
if (reg_init) {
ret = palmas_ldo_init(palmas, id, reg_init);
if (ret) {
regulator_unregister(pmic->rdev[id]);
goto err_unregister_regulator;
}
}
}
}
return 0;
err_unregister_regulator:
while (--id >= 0)
regulator_unregister(pmic->rdev[id]);
return ret;
}
static int palmas_remove(struct platform_device *pdev)
{
struct palmas_pmic *pmic = platform_get_drvdata(pdev);
int id;
for (id = 0; id < PALMAS_NUM_REGS; id++)
regulator_unregister(pmic->rdev[id]);
return 0;
}
static struct of_device_id of_palmas_match_tbl[] = {
{ .compatible = "ti,palmas-pmic", },
{ /* end */ }
};
static struct platform_driver palmas_driver = {
.driver = {
.name = "palmas-pmic",
.of_match_table = of_palmas_match_tbl,
.owner = THIS_MODULE,
},
.probe = palmas_probe,
.remove = palmas_remove,
};
static int __init palmas_init(void)
{
return platform_driver_register(&palmas_driver);
}
subsys_initcall(palmas_init);
static void __exit palmas_exit(void)
{
platform_driver_unregister(&palmas_driver);
}
module_exit(palmas_exit);
MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
MODULE_DESCRIPTION("Palmas voltage regulator driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:palmas-pmic");
MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);
