/*
* drivers/regulator/max77663-regulator.c
* Maxim LDO and Buck regulators driver
*
* Copyright 2011-2012 Maxim Integrated Products, Inc.
* Copyright (C) 2011-2012 NVIDIA Corporation
*
* 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/err.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max77663-core.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/max77663-regulator.h>
/* Regulator types */
#define REGULATOR_TYPE_SD 0
#define REGULATOR_TYPE_LDO_N 1
#define REGULATOR_TYPE_LDO_P 2
/* SD and LDO Registers */
#define MAX77663_REG_SD0 0x16
#define MAX77663_REG_SD1 0x17
#define MAX77663_REG_SD2 0x18
#define MAX77663_REG_SD3 0x19
#define MAX77663_REG_SD4 0x1A
#define MAX77663_REG_DVSSD0 0x1B
#define MAX77663_REG_DVSSD1 0x1C
#define MAX77663_REG_SD0_CFG 0x1D
#define MAX77663_REG_DVSSD0_CFG MAX77663_REG_SD0_CFG
#define MAX77663_REG_SD1_CFG 0x1E
#define MAX77663_REG_DVSSD1_CFG MAX77663_REG_SD1_CFG
#define MAX77663_REG_SD2_CFG 0x1F
#define MAX77663_REG_SD3_CFG 0x20
#define MAX77663_REG_SD4_CFG 0x21
#define MAX77663_REG_LDO0_CFG 0x23
#define MAX77663_REG_LDO0_CFG2 0x24
#define MAX77663_REG_LDO1_CFG 0x25
#define MAX77663_REG_LDO1_CFG2 0x26
#define MAX77663_REG_LDO2_CFG 0x27
#define MAX77663_REG_LDO2_CFG2 0x28
#define MAX77663_REG_LDO3_CFG 0x29
#define MAX77663_REG_LDO3_CFG2 0x2A
#define MAX77663_REG_LDO4_CFG 0x2B
#define MAX77663_REG_LDO4_CFG2 0x2C
#define MAX77663_REG_LDO5_CFG 0x2D
#define MAX77663_REG_LDO5_CFG2 0x2E
#define MAX77663_REG_LDO6_CFG 0x2F
#define MAX77663_REG_LDO6_CFG2 0x30
#define MAX77663_REG_LDO7_CFG 0x31
#define MAX77663_REG_LDO7_CFG2 0x32
#define MAX77663_REG_LDO8_CFG 0x33
#define MAX77663_REG_LDO8_CFG2 0x34
#define MAX77663_REG_LDO_CFG3 0x35
/* Power Mode */
#define POWER_MODE_NORMAL 3
#define POWER_MODE_LPM 2
#define POWER_MODE_GLPM 1
#define POWER_MODE_DISABLE 0
#define SD_POWER_MODE_MASK 0x30
#define SD_POWER_MODE_SHIFT 4
#define LDO_POWER_MODE_MASK 0xC0
#define LDO_POWER_MODE_SHIFT 6
/* SD Slew Rate */
#define SD_SR_13_75 0
#define SD_SR_27_5 1
#define SD_SR_55 2
#define SD_SR_100 3
#define SD_SR_MASK 0xC0
#define SD_SR_SHIFT 6
/* SD Forced PWM Mode */
#define SD_FPWM_MASK 0x04
#define SD_FPWM_SHIFT 2
/* SD Failling slew rate Active-Discharge Mode */
#define SD_FSRADE_MASK 0x01
#define SD_FSRADE_SHIFT 0
/* LDO Configuration 3 */
#define TRACK4_MASK 0x20
#define TRACK4_SHIFT 5
/* Voltage */
#define SDX_VOLT_MASK 0xFF
#define SD1_VOLT_MASK 0x3F
#define LDO_VOLT_MASK 0x3F
/* FPS Registers */
#define MAX77663_REG_FPS_CFG0 0x43
#define MAX77663_REG_FPS_CFG1 0x44
#define MAX77663_REG_FPS_CFG2 0x45
#define MAX77663_REG_FPS_LDO0 0x46
#define MAX77663_REG_FPS_LDO1 0x47
#define MAX77663_REG_FPS_LDO2 0x48
#define MAX77663_REG_FPS_LDO3 0x49
#define MAX77663_REG_FPS_LDO4 0x4A
#define MAX77663_REG_FPS_LDO5 0x4B
#define MAX77663_REG_FPS_LDO6 0x4C
#define MAX77663_REG_FPS_LDO7 0x4D
#define MAX77663_REG_FPS_LDO8 0x4E
#define MAX77663_REG_FPS_SD0 0x4F
#define MAX77663_REG_FPS_SD1 0x50
#define MAX77663_REG_FPS_SD2 0x51
#define MAX77663_REG_FPS_SD3 0x52
#define MAX77663_REG_FPS_SD4 0x53
#define MAX77663_REG_FPS_NONE 0
#define FPS_TIME_PERIOD_MASK 0x38
#define FPS_TIME_PERIOD_SHIFT 3
#define FPS_EN_SRC_MASK 0x06
#define FPS_EN_SRC_SHIFT 1
#define FPS_SW_EN_MASK 0x01
#define FPS_SW_EN_SHIFT 0
#define FPS_SRC_MASK 0xC0
#define FPS_SRC_SHIFT 6
#define FPS_PU_PERIOD_MASK 0x38
#define FPS_PU_PERIOD_SHIFT 3
#define FPS_PD_PERIOD_MASK 0x07
#define FPS_PD_PERIOD_SHIFT 0
/* Chip Identification Register */
#define MAX77663_REG_CID5 0x5D
#define CID_DIDM_MASK 0xF0
#define CID_DIDM_SHIFT 4
#define SD_SAFE_DOWN_UV 50000 /* 50mV */
enum {
VOLT_REG = 0,
CFG_REG,
FPS_REG,
};
struct max77663_register {
u8 addr;
u8 val;
};
struct max77663_regulator {
struct regulator_dev *rdev;
struct device *dev;
struct max77663_regulator_platform_data *pdata;
u8 id;
u8 type;
u32 min_uV;
u32 max_uV;
u32 step_uV;
int safe_down_uV; /* for stable down scaling */
u32 regulator_mode;
struct max77663_register regs[3]; /* volt, cfg, fps */
enum max77663_regulator_fps_src fps_src;
u8 volt_mask;
u8 power_mode;
u8 power_mode_mask;
u8 power_mode_shift;
};
#define fps_src_name(fps_src) \
(fps_src == FPS_SRC_0 ? "FPS_SRC_0" : \
fps_src == FPS_SRC_1 ? "FPS_SRC_1" : \
fps_src == FPS_SRC_2 ? "FPS_SRC_2" : "FPS_SRC_NONE")
static int fps_cfg_init;
static struct max77663_register fps_cfg_regs[] = {
{
.addr = MAX77663_REG_FPS_CFG0,
},
{
.addr = MAX77663_REG_FPS_CFG1,
},
{
.addr = MAX77663_REG_FPS_CFG2,
},
};
static inline struct max77663_regulator_platform_data
*_to_pdata(struct max77663_regulator *reg)
{
return reg->pdata;
}
static inline struct device *_to_parent(struct max77663_regulator *reg)
{
return reg->dev->parent;
}
static inline int max77663_regulator_cache_write(struct max77663_regulator *reg,
u8 addr, u8 mask, u8 val, u8 *cache)
{
struct device *parent = _to_parent(reg);
u8 new_val;
int ret;
new_val = (*cache & ~mask) | (val & mask);
if (*cache != new_val) {
ret = max77663_write(parent, addr, &new_val, 1, 0);
if (ret < 0)
return ret;
*cache = new_val;
}
return 0;
}
static int
max77663_regulator_set_fps_src(struct max77663_regulator *reg,
enum max77663_regulator_fps_src fps_src)
{
int ret;
if ((reg->regs[FPS_REG].addr == MAX77663_REG_FPS_NONE) ||
(reg->fps_src == fps_src))
return 0;
switch (fps_src) {
case FPS_SRC_0:
case FPS_SRC_1:
case FPS_SRC_2:
case FPS_SRC_NONE:
break;
case FPS_SRC_DEF:
return 0;
default:
return -EINVAL;
}
ret = max77663_regulator_cache_write(reg, reg->regs[FPS_REG].addr,
FPS_SRC_MASK, fps_src << FPS_SRC_SHIFT,
®->regs[FPS_REG].val);
if (ret < 0)
return ret;
reg->fps_src = fps_src;
return 0;
}
static int max77663_regulator_set_fps(struct max77663_regulator *reg)
{
struct max77663_regulator_platform_data *pdata = _to_pdata(reg);
u8 fps_val = 0, fps_mask = 0;
int ret = 0;
if (reg->regs[FPS_REG].addr == MAX77663_REG_FPS_NONE)
return 0;
if (reg->fps_src == FPS_SRC_NONE)
return 0;
/* FPS power up period setting */
if (pdata->fps_pu_period != FPS_POWER_PERIOD_DEF) {
fps_val |= (pdata->fps_pu_period << FPS_PU_PERIOD_SHIFT);
fps_mask |= FPS_PU_PERIOD_MASK;
}
/* FPS power down period setting */
if (pdata->fps_pd_period != FPS_POWER_PERIOD_DEF) {
fps_val |= (pdata->fps_pd_period << FPS_PD_PERIOD_SHIFT);
fps_mask |= FPS_PD_PERIOD_MASK;
}
if (fps_val)
ret = max77663_regulator_cache_write(reg,
reg->regs[FPS_REG].addr, fps_mask,
fps_val, ®->regs[FPS_REG].val);
return ret;
}
static int
max77663_regulator_set_fps_cfg(struct max77663_regulator *reg,
struct max77663_regulator_fps_cfg *fps_cfg)
{
u8 val, mask;
if ((fps_cfg->src < FPS_SRC_0) || (fps_cfg->src > FPS_SRC_2))
return -EINVAL;
val = (fps_cfg->en_src << FPS_EN_SRC_SHIFT);
mask = FPS_EN_SRC_MASK;
if (fps_cfg->time_period != FPS_TIME_PERIOD_DEF) {
val |= (fps_cfg->time_period << FPS_TIME_PERIOD_SHIFT);
mask |= FPS_TIME_PERIOD_MASK;
}
return max77663_regulator_cache_write(reg,
fps_cfg_regs[fps_cfg->src].addr, mask,
val, &fps_cfg_regs[fps_cfg->src].val);
}
static int
max77663_regulator_set_fps_cfgs(struct max77663_regulator *reg,
struct max77663_regulator_fps_cfg *fps_cfgs,
int num_fps_cfgs)
{
struct device *parent = _to_parent(reg);
int i, ret;
if (fps_cfg_init)
return 0;
for (i = 0; i <= FPS_SRC_2; i++) {
ret = max77663_read(parent, fps_cfg_regs[i].addr,
&fps_cfg_regs[i].val, 1, 0);
if (ret < 0)
return ret;
}
for (i = 0; i < num_fps_cfgs; i++) {
ret = max77663_regulator_set_fps_cfg(reg, &fps_cfgs[i]);
if (ret < 0)
return ret;
}
fps_cfg_init = 1;
return 0;
}
static int
max77663_regulator_set_power_mode(struct max77663_regulator *reg, u8 power_mode)
{
u8 mask = reg->power_mode_mask;
u8 shift = reg->power_mode_shift;
int ret;
if (reg->type == REGULATOR_TYPE_SD)
ret = max77663_regulator_cache_write(reg,
reg->regs[CFG_REG].addr,
mask, power_mode << shift,
®->regs[CFG_REG].val);
else
ret = max77663_regulator_cache_write(reg,
reg->regs[VOLT_REG].addr,
mask, power_mode << shift,
®->regs[VOLT_REG].val);
if (ret < 0)
return ret;
reg->power_mode = power_mode;
return ret;
}
static u8 max77663_regulator_get_power_mode(struct max77663_regulator *reg)
{
u8 mask = reg->power_mode_mask;
u8 shift = reg->power_mode_shift;
if (reg->type == REGULATOR_TYPE_SD)
reg->power_mode = (reg->regs[CFG_REG].val & mask) >> shift;
else
reg->power_mode = (reg->regs[VOLT_REG].val & mask) >> shift;
return reg->power_mode;
}
static int max77663_regulator_do_set_voltage(struct max77663_regulator *reg,
int min_uV, int max_uV)
{
u8 addr = reg->regs[VOLT_REG].addr;
u8 mask = reg->volt_mask;
u8 *cache = ®->regs[VOLT_REG].val;
u8 val;
int old_uV, new_uV, safe_uV;
int i, steps = 1;
int ret = 0;
if (min_uV < reg->min_uV || max_uV > reg->max_uV)
return -EDOM;
old_uV = (*cache & mask) * reg->step_uV + reg->min_uV;
if ((old_uV > min_uV) && (reg->safe_down_uV >= reg->step_uV)) {
steps = DIV_ROUND_UP(old_uV - min_uV, reg->safe_down_uV);
safe_uV = -reg->safe_down_uV;
}
if (steps == 1) {
val = (min_uV - reg->min_uV) / reg->step_uV;
ret = max77663_regulator_cache_write(reg, addr, mask, val,
cache);
} else {
for (i = 0; i < steps; i++) {
if (abs(min_uV - old_uV) > abs(safe_uV))
new_uV = old_uV + safe_uV;
else
new_uV = min_uV;
dev_dbg(®->rdev->dev, "do_set_voltage: name=%s, "
"%d/%d, old_uV=%d, new_uV=%d\n",
reg->rdev->desc->name, i + 1, steps, old_uV,
new_uV);
val = (new_uV - reg->min_uV) / reg->step_uV;
ret = max77663_regulator_cache_write(reg, addr, mask,
val, cache);
if (ret < 0)
return ret;
old_uV = new_uV;
}
}
return ret;
}
static int max77663_regulator_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV,
unsigned *selector)
{
struct max77663_regulator *reg = rdev_get_drvdata(rdev);
dev_dbg(&rdev->dev, "set_voltage: name=%s, min_uV=%d, max_uV=%d\n",
rdev->desc->name, min_uV, max_uV);
return max77663_regulator_do_set_voltage(reg, min_uV, max_uV);
}
static int max77663_regulator_get_voltage(struct regulator_dev *rdev)
{
struct max77663_regulator *reg = rdev_get_drvdata(rdev);
int volt;
volt = (reg->regs[VOLT_REG].val & reg->volt_mask)
* reg->step_uV + reg->min_uV;
dev_dbg(&rdev->dev, "get_voltage: name=%s, volt=%d, val=0x%02x\n",
rdev->desc->name, volt, reg->regs[VOLT_REG].val);
return volt;
}
static int max77663_regulator_enable(struct regulator_dev *rdev)
{
struct max77663_regulator *reg = rdev_get_drvdata(rdev);
struct max77663_regulator_platform_data *pdata = _to_pdata(reg);
int power_mode = (pdata->flags & GLPM_ENABLE) ?
POWER_MODE_GLPM : POWER_MODE_NORMAL;
if (reg->fps_src != FPS_SRC_NONE) {
dev_dbg(&rdev->dev, "enable: Regulator %s using %s\n",
rdev->desc->name, fps_src_name(reg->fps_src));
return 0;
}
if ((reg->id == MAX77663_REGULATOR_ID_SD0)
&& (pdata->flags & EN2_CTRL_SD0)) {
dev_dbg(&rdev->dev,
"enable: Regulator %s is controlled by EN2\n",
rdev->desc->name);
return 0;
}
/* N-Channel LDOs don't support Low-Power mode. */
if ((reg->type != REGULATOR_TYPE_LDO_N) &&
(reg->regulator_mode == REGULATOR_MODE_STANDBY))
power_mode = POWER_MODE_LPM;
return max77663_regulator_set_power_mode(reg, power_mode);
}
static int max77663_regulator_disable(struct regulator_dev *rdev)
{
struct max77663_regulator *reg = rdev_get_drvdata(rdev);
struct max77663_regulator_platform_data *pdata = _to_pdata(reg);
int power_mode = POWER_MODE_DISABLE;
if (reg->fps_src != FPS_SRC_NONE) {
dev_dbg(&rdev->dev, "disable: Regulator %s using %s\n",
rdev->desc->name, fps_src_name(reg->fps_src));
return 0;
}
if ((reg->id == MAX77663_REGULATOR_ID_SD0)
&& (pdata->flags & EN2_CTRL_SD0)) {
dev_dbg(&rdev->dev,
"disable: Regulator %s is controlled by EN2\n",
rdev->desc->name);
return 0;
}
return max77663_regulator_set_power_mode(reg, power_mode);
}
static int max77663_regulator_is_enabled(struct regulator_dev *rdev)
{
struct max77663_regulator *reg = rdev_get_drvdata(rdev);
struct max77663_regulator_platform_data *pdata = _to_pdata(reg);
int ret = 1;
if (reg->fps_src != FPS_SRC_NONE) {
dev_dbg(&rdev->dev, "is_enable: Regulator %s using %s\n",
rdev->desc->name, fps_src_name(reg->fps_src));
return 1;
}
if ((reg->id == MAX77663_REGULATOR_ID_SD0)
&& (pdata->flags & EN2_CTRL_SD0)) {
dev_dbg(&rdev->dev,
"is_enable: Regulator %s is controlled by EN2\n",
rdev->desc->name);
return 1;
}
if (max77663_regulator_get_power_mode(reg) == POWER_MODE_DISABLE)
ret = 0;
return ret;
}
static int max77663_regulator_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct max77663_regulator *reg = rdev_get_drvdata(rdev);
struct max77663_regulator_platform_data *pdata = _to_pdata(reg);
u8 power_mode;
int ret;
if (mode == REGULATOR_MODE_NORMAL)
power_mode = (pdata->flags & GLPM_ENABLE) ?
POWER_MODE_GLPM : POWER_MODE_NORMAL;
else if (mode == REGULATOR_MODE_STANDBY) {
/* N-Channel LDOs don't support Low-Power mode. */
power_mode = (reg->type != REGULATOR_TYPE_LDO_N) ?
POWER_MODE_LPM : POWER_MODE_NORMAL;
} else
return -EINVAL;
ret = max77663_regulator_set_power_mode(reg, power_mode);
if (!ret)
reg->regulator_mode = mode;
return ret;
}
static unsigned int max77663_regulator_get_mode(struct regulator_dev *rdev)
{
struct max77663_regulator *reg = rdev_get_drvdata(rdev);
return reg->regulator_mode;
}
static struct regulator_ops max77663_ldo_ops = {
.set_voltage = max77663_regulator_set_voltage,
.get_voltage = max77663_regulator_get_voltage,
.enable = max77663_regulator_enable,
.disable = max77663_regulator_disable,
.is_enabled = max77663_regulator_is_enabled,
.set_mode = max77663_regulator_set_mode,
.get_mode = max77663_regulator_get_mode,
};
static int max77663_regulator_preinit(struct max77663_regulator *reg)
{
struct max77663_regulator_platform_data *pdata = _to_pdata(reg);
struct device *parent = _to_parent(reg);
int i;
u8 val, mask;
int ret;
/* Update registers */
for (i = 0; i <= FPS_REG; i++) {
ret = max77663_read(parent, reg->regs[i].addr,
®->regs[i].val, 1, 0);
if (ret < 0) {
dev_err(reg->dev,
"preinit: Failed to get register 0x%x\n",
reg->regs[i].addr);
return ret;
}
}
/* Update FPS source */
if (reg->regs[FPS_REG].addr == MAX77663_REG_FPS_NONE)
reg->fps_src = FPS_SRC_NONE;
else
reg->fps_src = (reg->regs[FPS_REG].val & FPS_SRC_MASK)
>> FPS_SRC_SHIFT;
dev_dbg(reg->dev, "preinit: initial fps_src=%s\n",
fps_src_name(reg->fps_src));
/* Update power mode */
max77663_regulator_get_power_mode(reg);
/* Check Chip Identification */
ret = max77663_read(parent, MAX77663_REG_CID5, &val, 1, 0);
if (ret < 0) {
dev_err(reg->dev, "preinit: Failed to get register 0x%x\n",
MAX77663_REG_CID5);
return ret;
}
/* If metal revision is less than rev.3,
* set safe_down_uV for stable down scaling. */
if ((reg->type == REGULATOR_TYPE_SD) &&
((val & CID_DIDM_MASK) >> CID_DIDM_SHIFT) <= 2)
reg->safe_down_uV = SD_SAFE_DOWN_UV;
else
reg->safe_down_uV = 0;
/* Set FPS */
ret = max77663_regulator_set_fps_cfgs(reg, pdata->fps_cfgs,
pdata->num_fps_cfgs);
if (ret < 0) {
dev_err(reg->dev, "preinit: Failed to set FPSCFG\n");
return ret;
}
/* N-Channel LDOs don't support Low-Power mode. */
if ((reg->type == REGULATOR_TYPE_LDO_N) &&
(pdata->flags & GLPM_ENABLE))
pdata->flags &= ~GLPM_ENABLE;
/* To prevent power rail turn-off when change FPS source,
* it must set power mode to NORMAL before change FPS source to NONE
* from SRC_0, SRC_1 and SRC_2. */
if ((reg->fps_src != FPS_SRC_NONE) && (pdata->fps_src == FPS_SRC_NONE)
&& (reg->power_mode != POWER_MODE_NORMAL)) {
val = (pdata->flags & GLPM_ENABLE) ?
POWER_MODE_GLPM : POWER_MODE_NORMAL;
ret = max77663_regulator_set_power_mode(reg, val);
if (ret < 0) {
dev_err(reg->dev, "preinit: Failed to "
"set power mode to POWER_MODE_NORMAL\n");
return ret;
}
}
ret = max77663_regulator_set_fps_src(reg, pdata->fps_src);
if (ret < 0) {
dev_err(reg->dev, "preinit: Failed to set FPSSRC to %d\n",
pdata->fps_src);
return ret;
}
ret = max77663_regulator_set_fps(reg);
if (ret < 0) {
dev_err(reg->dev, "preinit: Failed to set FPS\n");
return ret;
}
/* Set initial state */
if (!pdata->init_apply)
goto skip_init_apply;
if (pdata->init_uV >= 0) {
ret = max77663_regulator_do_set_voltage(reg, pdata->init_uV,
pdata->init_uV);
if (ret < 0) {
dev_err(reg->dev, "preinit: Failed to set voltage to "
"%d\n", pdata->init_uV);
return ret;
}
}
if (pdata->init_enable)
val = (pdata->flags & GLPM_ENABLE) ?
POWER_MODE_GLPM : POWER_MODE_NORMAL;
else
val = POWER_MODE_DISABLE;
ret = max77663_regulator_set_power_mode(reg, val);
if (ret < 0) {
dev_err(reg->dev,
"preinit: Failed to set power mode to %d\n", val);
return ret;
}
skip_init_apply:
if (reg->type == REGULATOR_TYPE_SD) {
val = 0;
mask = 0;
if (pdata->flags & SD_SLEW_RATE_MASK) {
mask |= SD_SR_MASK;
if (pdata->flags & SD_SLEW_RATE_SLOWEST)
val |= (SD_SR_13_75 << SD_SR_SHIFT);
else if (pdata->flags & SD_SLEW_RATE_SLOW)
val |= (SD_SR_27_5 << SD_SR_SHIFT);
else if (pdata->flags & SD_SLEW_RATE_FAST)
val |= (SD_SR_55 << SD_SR_SHIFT);
else
val |= (SD_SR_100 << SD_SR_SHIFT);
}
if (pdata->flags & SD_FORCED_PWM_MODE) {
mask |= SD_FPWM_MASK;
val |= SD_FPWM_MASK;
}
if (pdata->flags & SD_FSRADE_DISABLE) {
mask |= SD_FSRADE_MASK;
val |= SD_FSRADE_MASK;
}
ret = max77663_regulator_cache_write(reg,
reg->regs[CFG_REG].addr, mask, val,
®->regs[CFG_REG].val);
if (ret < 0) {
dev_err(reg->dev, "preinit: "
"Failed to set register 0x%x\n",
reg->regs[CFG_REG].addr);
return ret;
}
if ((reg->id == MAX77663_REGULATOR_ID_SD0)
&& (pdata->flags & EN2_CTRL_SD0)) {
val = POWER_MODE_DISABLE;
ret = max77663_regulator_set_power_mode(reg, val);
if (ret < 0) {
dev_err(reg->dev, "preinit: "
"Failed to set power mode to %d for "
"EN2_CTRL_SD0\n", val);
return ret;
}
ret = max77663_regulator_set_fps_src(reg, FPS_SRC_NONE);
if (ret < 0) {
dev_err(reg->dev, "preinit: "
"Failed to set FPSSRC to FPS_SRC_NONE "
"for EN2_CTRL_SD0\n");
return ret;
}
}
}
if ((reg->id == MAX77663_REGULATOR_ID_LDO4)
&& (pdata->flags & LDO4_EN_TRACKING)) {
val = TRACK4_MASK;
ret = max77663_write(parent, MAX77663_REG_LDO_CFG3, &val, 1, 0);
if (ret < 0) {
dev_err(reg->dev, "preinit: "
"Failed to set register 0x%x\n",
MAX77663_REG_LDO_CFG3);
return ret;
}
}
return 0;
}
#define REGULATOR_SD(_id, _volt_mask, _fps_reg, _min_uV, _max_uV, _step_uV) \
[MAX77663_REGULATOR_ID_##_id] = { \
.id = MAX77663_REGULATOR_ID_##_id, \
.type = REGULATOR_TYPE_SD, \
.volt_mask = _volt_mask##_VOLT_MASK, \
.regs = { \
[VOLT_REG] = { \
.addr = MAX77663_REG_##_id, \
}, \
[CFG_REG] = { \
.addr = MAX77663_REG_##_id##_CFG, \
}, \
[FPS_REG] = { \
.addr = MAX77663_REG_FPS_##_fps_reg, \
}, \
}, \
.min_uV = _min_uV, \
.max_uV = _max_uV, \
.step_uV = _step_uV, \
.regulator_mode = REGULATOR_MODE_NORMAL, \
.power_mode = POWER_MODE_NORMAL, \
.power_mode_mask = SD_POWER_MODE_MASK, \
.power_mode_shift = SD_POWER_MODE_SHIFT, \
}
#define REGULATOR_LDO(_id, _type, _min_uV, _max_uV, _step_uV) \
[MAX77663_REGULATOR_ID_##_id] = { \
.id = MAX77663_REGULATOR_ID_##_id, \
.type = REGULATOR_TYPE_LDO_##_type, \
.volt_mask = LDO_VOLT_MASK, \
.regs = { \
[VOLT_REG] = { \
.addr = MAX77663_REG_##_id##_CFG, \
}, \
[CFG_REG] = { \
.addr = MAX77663_REG_##_id##_CFG2, \
}, \
[FPS_REG] = { \
.addr = MAX77663_REG_FPS_##_id, \
}, \
}, \
.min_uV = _min_uV, \
.max_uV = _max_uV, \
.step_uV = _step_uV, \
.regulator_mode = REGULATOR_MODE_NORMAL, \
.power_mode = POWER_MODE_NORMAL, \
.power_mode_mask = LDO_POWER_MODE_MASK, \
.power_mode_shift = LDO_POWER_MODE_SHIFT, \
}
static struct max77663_regulator max77663_regs[MAX77663_REGULATOR_ID_NR] = {
REGULATOR_SD(SD0, SDX, SD0, 600000, 3387500, 12500),
REGULATOR_SD(DVSSD0, SDX, NONE, 600000, 3387500, 12500),
REGULATOR_SD(SD1, SD1, SD1, 800000, 1587500, 12500),
REGULATOR_SD(DVSSD1, SD1, NONE, 800000, 1587500, 12500),
REGULATOR_SD(SD2, SDX, SD2, 600000, 3387500, 12500),
REGULATOR_SD(SD3, SDX, SD3, 600000, 3387500, 12500),
REGULATOR_SD(SD4, SDX, SD4, 600000, 3387500, 12500),
REGULATOR_LDO(LDO0, N, 800000, 2350000, 25000),
REGULATOR_LDO(LDO1, N, 800000, 2350000, 25000),
REGULATOR_LDO(LDO2, P, 800000, 3950000, 50000),
REGULATOR_LDO(LDO3, P, 800000, 3950000, 50000),
REGULATOR_LDO(LDO4, P, 800000, 1587500, 12500),
REGULATOR_LDO(LDO5, P, 800000, 3950000, 50000),
REGULATOR_LDO(LDO6, P, 800000, 3950000, 50000),
REGULATOR_LDO(LDO7, N, 800000, 3950000, 50000),
REGULATOR_LDO(LDO8, N, 800000, 3950000, 50000),
};
#define REGULATOR_DESC(_id, _name) \
[MAX77663_REGULATOR_ID_##_id] = { \
.name = max77663_rails(_name), \
.id = MAX77663_REGULATOR_ID_##_id, \
.ops = &max77663_ldo_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}
static struct regulator_desc max77663_rdesc[MAX77663_REGULATOR_ID_NR] = {
REGULATOR_DESC(SD0, sd0),
REGULATOR_DESC(DVSSD0, dvssd0),
REGULATOR_DESC(SD1, sd1),
REGULATOR_DESC(DVSSD1, dvssd1),
REGULATOR_DESC(SD2, sd2),
REGULATOR_DESC(SD3, sd3),
REGULATOR_DESC(SD4, sd4),
REGULATOR_DESC(LDO0, ldo0),
REGULATOR_DESC(LDO1, ldo1),
REGULATOR_DESC(LDO2, ldo2),
REGULATOR_DESC(LDO3, ldo3),
REGULATOR_DESC(LDO4, ldo4),
REGULATOR_DESC(LDO5, ldo5),
REGULATOR_DESC(LDO6, ldo6),
REGULATOR_DESC(LDO7, ldo7),
REGULATOR_DESC(LDO8, ldo8),
};
static int max77663_regulator_probe(struct platform_device *pdev)
{
struct regulator_desc *rdesc;
struct max77663_regulator *reg;
int ret = 0;
if ((pdev->id < 0) || (pdev->id >= MAX77663_REGULATOR_ID_NR)) {
dev_err(&pdev->dev, "Invalid device id %d\n", pdev->id);
return -ENODEV;
}
rdesc = &max77663_rdesc[pdev->id];
reg = &max77663_regs[pdev->id];
reg->dev = &pdev->dev;
reg->pdata = dev_get_platdata(&pdev->dev);
dev_dbg(&pdev->dev, "probe: name=%s\n", rdesc->name);
ret = max77663_regulator_preinit(reg);
if (ret) {
dev_err(&pdev->dev, "probe: Failed to preinit regulator %s\n",
rdesc->name);
return ret;
}
reg->rdev = regulator_register(rdesc, &pdev->dev,
®->pdata->init_data, reg);
if (IS_ERR(reg->rdev)) {
dev_err(&pdev->dev, "probe: Failed to register regulator %s\n",
rdesc->name);
return PTR_ERR(reg->rdev);
}
return 0;
}
static int max77663_regulator_remove(struct platform_device *pdev)
{
struct regulator_dev *rdev = platform_get_drvdata(pdev);
regulator_unregister(rdev);
return 0;
}
static struct platform_driver max77663_regulator_driver = {
.probe = max77663_regulator_probe,
.remove = __devexit_p(max77663_regulator_remove),
.driver = {
.name = "max77663-regulator",
.owner = THIS_MODULE,
},
};
static int __init max77663_regulator_init(void)
{
return platform_driver_register(&max77663_regulator_driver);
}
subsys_initcall(max77663_regulator_init);
static void __exit max77663_reg_exit(void)
{
platform_driver_unregister(&max77663_regulator_driver);
}
module_exit(max77663_reg_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("max77663 regulator driver");
MODULE_VERSION("1.0");
