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kernel-fxtec-pro1x/drivers/regulator/max77620-regulator.c
Laxman Dewangan 5aa43599da regulator: max77620: Add support for device specific ramp rate setting 
Maxim advertised the ramp rate of the rail with some recommended
design specification like output capacitance of rail should be
2.2uF. This make sure that current change in the rail is within
maximum current limit and hence meet the advertised ramp rate.

If there is variation in design which causes the rail current to
change more that maximum current limit then device applies the
current limit. In this case, ramp rate is different than advertised
ramp rate.

Add device specific settings for ramp rate which need to be configure
on device register when measure ramp rate on platform is deviated from
advertised ramp rate. In this case, all delay time calculation for
voltage change is done with measured ramp rate and device ramp rate
is used for configuring the device register.

If measured ramp rate in the platform is same as advertised ramp rate
then regulator-ramp-delay is used for the device register configuration
and ramp time calculation for voltage change.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-22 16:26:41 +01:00

842 lines
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/*
* Maxim MAX77620 Regulator driver
*
* Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
*
* Author: Mallikarjun Kasoju <mkasoju@nvidia.com>
* Laxman Dewangan <ldewangan@nvidia.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/mfd/max77620.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#define max77620_rails(_name) "max77620-"#_name
/* Power Mode */
#define MAX77620_POWER_MODE_NORMAL 3
#define MAX77620_POWER_MODE_LPM 2
#define MAX77620_POWER_MODE_GLPM 1
#define MAX77620_POWER_MODE_DISABLE 0
/* SD Slew Rate */
#define MAX77620_SD_SR_13_75 0
#define MAX77620_SD_SR_27_5 1
#define MAX77620_SD_SR_55 2
#define MAX77620_SD_SR_100 3
enum max77620_regulators {
MAX77620_REGULATOR_ID_SD0,
MAX77620_REGULATOR_ID_SD1,
MAX77620_REGULATOR_ID_SD2,
MAX77620_REGULATOR_ID_SD3,
MAX77620_REGULATOR_ID_SD4,
MAX77620_REGULATOR_ID_LDO0,
MAX77620_REGULATOR_ID_LDO1,
MAX77620_REGULATOR_ID_LDO2,
MAX77620_REGULATOR_ID_LDO3,
MAX77620_REGULATOR_ID_LDO4,
MAX77620_REGULATOR_ID_LDO5,
MAX77620_REGULATOR_ID_LDO6,
MAX77620_REGULATOR_ID_LDO7,
MAX77620_REGULATOR_ID_LDO8,
MAX77620_NUM_REGS,
};
/* Regulator types */
enum max77620_regulator_type {
MAX77620_REGULATOR_TYPE_SD,
MAX77620_REGULATOR_TYPE_LDO_N,
MAX77620_REGULATOR_TYPE_LDO_P,
};
struct max77620_regulator_info {
u8 type;
u8 fps_addr;
u8 volt_addr;
u8 cfg_addr;
u8 power_mode_mask;
u8 power_mode_shift;
u8 remote_sense_addr;
u8 remote_sense_mask;
struct regulator_desc desc;
};
struct max77620_regulator_pdata {
struct regulator_init_data *reg_idata;
int active_fps_src;
int active_fps_pd_slot;
int active_fps_pu_slot;
int suspend_fps_src;
int suspend_fps_pd_slot;
int suspend_fps_pu_slot;
int current_mode;
int ramp_rate_setting;
};
struct max77620_regulator {
struct device *dev;
struct regmap *rmap;
struct max77620_regulator_info *rinfo[MAX77620_NUM_REGS];
struct max77620_regulator_pdata reg_pdata[MAX77620_NUM_REGS];
int enable_power_mode[MAX77620_NUM_REGS];
int current_power_mode[MAX77620_NUM_REGS];
int active_fps_src[MAX77620_NUM_REGS];
};
#define fps_src_name(fps_src) \
(fps_src == MAX77620_FPS_SRC_0 ? "FPS_SRC_0" : \
fps_src == MAX77620_FPS_SRC_1 ? "FPS_SRC_1" : \
fps_src == MAX77620_FPS_SRC_2 ? "FPS_SRC_2" : "FPS_SRC_NONE")
static int max77620_regulator_get_fps_src(struct max77620_regulator *pmic,
int id)
{
struct max77620_regulator_info *rinfo = pmic->rinfo[id];
unsigned int val;
int ret;
ret = regmap_read(pmic->rmap, rinfo->fps_addr, &val);
if (ret < 0) {
dev_err(pmic->dev, "Reg 0x%02x read failed %d\n",
rinfo->fps_addr, ret);
return ret;
}
return (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT;
}
static int max77620_regulator_set_fps_src(struct max77620_regulator *pmic,
int fps_src, int id)
{
struct max77620_regulator_info *rinfo = pmic->rinfo[id];
unsigned int val;
int ret;
switch (fps_src) {
case MAX77620_FPS_SRC_0:
case MAX77620_FPS_SRC_1:
case MAX77620_FPS_SRC_2:
case MAX77620_FPS_SRC_NONE:
break;
case MAX77620_FPS_SRC_DEF:
ret = regmap_read(pmic->rmap, rinfo->fps_addr, &val);
if (ret < 0) {
dev_err(pmic->dev, "Reg 0x%02x read failed %d\n",
rinfo->fps_addr, ret);
return ret;
}
ret = (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT;
pmic->active_fps_src[id] = ret;
return 0;
default:
dev_err(pmic->dev, "Invalid FPS %d for regulator %d\n",
fps_src, id);
return -EINVAL;
}
ret = regmap_update_bits(pmic->rmap, rinfo->fps_addr,
MAX77620_FPS_SRC_MASK,
fps_src << MAX77620_FPS_SRC_SHIFT);
if (ret < 0) {
dev_err(pmic->dev, "Reg 0x%02x update failed %d\n",
rinfo->fps_addr, ret);
return ret;
}
pmic->active_fps_src[id] = fps_src;
return 0;
}
static int max77620_regulator_set_fps_slots(struct max77620_regulator *pmic,
int id, bool is_suspend)
{
struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
struct max77620_regulator_info *rinfo = pmic->rinfo[id];
unsigned int val = 0;
unsigned int mask = 0;
int pu = rpdata->active_fps_pu_slot;
int pd = rpdata->active_fps_pd_slot;
int ret = 0;
if (is_suspend) {
pu = rpdata->suspend_fps_pu_slot;
pd = rpdata->suspend_fps_pd_slot;
}
/* FPS power up period setting */
if (pu >= 0) {
val |= (pu << MAX77620_FPS_PU_PERIOD_SHIFT);
mask |= MAX77620_FPS_PU_PERIOD_MASK;
}
/* FPS power down period setting */
if (pd >= 0) {
val |= (pd << MAX77620_FPS_PD_PERIOD_SHIFT);
mask |= MAX77620_FPS_PD_PERIOD_MASK;
}
if (mask) {
ret = regmap_update_bits(pmic->rmap, rinfo->fps_addr,
mask, val);
if (ret < 0) {
dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n",
rinfo->fps_addr, ret);
return ret;
}
}
return ret;
}
static int max77620_regulator_set_power_mode(struct max77620_regulator *pmic,
int power_mode, int id)
{
struct max77620_regulator_info *rinfo = pmic->rinfo[id];
u8 mask = rinfo->power_mode_mask;
u8 shift = rinfo->power_mode_shift;
u8 addr;
int ret;
switch (rinfo->type) {
case MAX77620_REGULATOR_TYPE_SD:
addr = rinfo->cfg_addr;
break;
default:
addr = rinfo->volt_addr;
break;
}
ret = regmap_update_bits(pmic->rmap, addr, mask, power_mode << shift);
if (ret < 0) {
dev_err(pmic->dev, "Regulator %d mode set failed: %d\n",
id, ret);
return ret;
}
pmic->current_power_mode[id] = power_mode;
return ret;
}
static int max77620_regulator_get_power_mode(struct max77620_regulator *pmic,
int id)
{
struct max77620_regulator_info *rinfo = pmic->rinfo[id];
unsigned int val, addr;
u8 mask = rinfo->power_mode_mask;
u8 shift = rinfo->power_mode_shift;
int ret;
switch (rinfo->type) {
case MAX77620_REGULATOR_TYPE_SD:
addr = rinfo->cfg_addr;
break;
default:
addr = rinfo->volt_addr;
break;
}
ret = regmap_read(pmic->rmap, addr, &val);
if (ret < 0) {
dev_err(pmic->dev, "Regulator %d: Reg 0x%02x read failed: %d\n",
id, addr, ret);
return ret;
}
return (val & mask) >> shift;
}
static int max77620_read_slew_rate(struct max77620_regulator *pmic, int id)
{
struct max77620_regulator_info *rinfo = pmic->rinfo[id];
unsigned int rval;
int slew_rate;
int ret;
ret = regmap_read(pmic->rmap, rinfo->cfg_addr, &rval);
if (ret < 0) {
dev_err(pmic->dev, "Register 0x%02x read failed: %d\n",
rinfo->cfg_addr, ret);
return ret;
}
switch (rinfo->type) {
case MAX77620_REGULATOR_TYPE_SD:
slew_rate = (rval >> MAX77620_SD_SR_SHIFT) & 0x3;
switch (slew_rate) {
case 0:
slew_rate = 13750;
break;
case 1:
slew_rate = 27500;
break;
case 2:
slew_rate = 55000;
break;
case 3:
slew_rate = 100000;
break;
}
rinfo->desc.ramp_delay = slew_rate;
break;
default:
slew_rate = rval & 0x1;
switch (slew_rate) {
case 0:
slew_rate = 100000;
break;
case 1:
slew_rate = 5000;
break;
}
rinfo->desc.ramp_delay = slew_rate;
break;
}
return 0;
}
static int max77620_set_slew_rate(struct max77620_regulator *pmic, int id,
int slew_rate)
{
struct max77620_regulator_info *rinfo = pmic->rinfo[id];
unsigned int val;
int ret;
u8 mask;
if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
if (slew_rate <= 13750)
val = 0;
else if (slew_rate <= 27500)
val = 1;
else if (slew_rate <= 55000)
val = 2;
else
val = 3;
val <<= MAX77620_SD_SR_SHIFT;
mask = MAX77620_SD_SR_MASK;
} else {
if (slew_rate <= 5000)
val = 1;
else
val = 0;
mask = MAX77620_LDO_SLEW_RATE_MASK;
}
ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr, mask, val);
if (ret < 0) {
dev_err(pmic->dev, "Regulator %d slew rate set failed: %d\n",
id, ret);
return ret;
}
return 0;
}
static int max77620_init_pmic(struct max77620_regulator *pmic, int id)
{
struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
int ret;
/* Update power mode */
ret = max77620_regulator_get_power_mode(pmic, id);
if (ret < 0)
return ret;
pmic->current_power_mode[id] = ret;
pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL;
if (rpdata->active_fps_src == MAX77620_FPS_SRC_DEF) {
ret = max77620_regulator_get_fps_src(pmic, id);
if (ret < 0)
return ret;
rpdata->active_fps_src = ret;
}
/* If rails are externally control of FPS then enable it always. */
if (rpdata->active_fps_src == MAX77620_FPS_SRC_NONE) {
ret = max77620_regulator_set_power_mode(pmic,
pmic->enable_power_mode[id], id);
if (ret < 0)
return ret;
} else {
if (pmic->current_power_mode[id] !=
pmic->enable_power_mode[id]) {
ret = max77620_regulator_set_power_mode(pmic,
pmic->enable_power_mode[id], id);
if (ret < 0)
return ret;
}
}
ret = max77620_regulator_set_fps_src(pmic, rpdata->active_fps_src, id);
if (ret < 0)
return ret;
ret = max77620_regulator_set_fps_slots(pmic, id, false);
if (ret < 0)
return ret;
if (rpdata->ramp_rate_setting) {
ret = max77620_set_slew_rate(pmic, id,
rpdata->ramp_rate_setting);
if (ret < 0)
return ret;
}
return 0;
}
static int max77620_regulator_enable(struct regulator_dev *rdev)
{
struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
return 0;
return max77620_regulator_set_power_mode(pmic,
pmic->enable_power_mode[id], id);
}
static int max77620_regulator_disable(struct regulator_dev *rdev)
{
struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
return 0;
return max77620_regulator_set_power_mode(pmic,
MAX77620_POWER_MODE_DISABLE, id);
}
static int max77620_regulator_is_enabled(struct regulator_dev *rdev)
{
struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
int ret = 1;
if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
return 1;
ret = max77620_regulator_get_power_mode(pmic, id);
if (ret < 0)
return ret;
if (ret != MAX77620_POWER_MODE_DISABLE)
return 1;
return 0;
}
static int max77620_regulator_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
struct max77620_regulator_info *rinfo = pmic->rinfo[id];
struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
bool fpwm = false;
int power_mode;
int ret;
u8 val;
switch (mode) {
case REGULATOR_MODE_FAST:
fpwm = true;
power_mode = MAX77620_POWER_MODE_NORMAL;
break;
case REGULATOR_MODE_NORMAL:
power_mode = MAX77620_POWER_MODE_NORMAL;
break;
case REGULATOR_MODE_IDLE:
power_mode = MAX77620_POWER_MODE_LPM;
break;
default:
dev_err(pmic->dev, "Regulator %d mode %d is invalid\n",
id, mode);
return -EINVAL;
}
if (rinfo->type != MAX77620_REGULATOR_TYPE_SD)
goto skip_fpwm;
val = (fpwm) ? MAX77620_SD_FPWM_MASK : 0;
ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr,
MAX77620_SD_FPWM_MASK, val);
if (ret < 0) {
dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n",
rinfo->cfg_addr, ret);
return ret;
}
rpdata->current_mode = mode;
skip_fpwm:
ret = max77620_regulator_set_power_mode(pmic, power_mode, id);
if (ret < 0)
return ret;
pmic->enable_power_mode[id] = power_mode;
return 0;
}
static unsigned int max77620_regulator_get_mode(struct regulator_dev *rdev)
{
struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
struct max77620_regulator_info *rinfo = pmic->rinfo[id];
int fpwm = 0;
int ret;
int pm_mode, reg_mode;
unsigned int val;
ret = max77620_regulator_get_power_mode(pmic, id);
if (ret < 0)
return 0;
pm_mode = ret;
if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
ret = regmap_read(pmic->rmap, rinfo->cfg_addr, &val);
if (ret < 0) {
dev_err(pmic->dev, "Reg 0x%02x read failed: %d\n",
rinfo->cfg_addr, ret);
return ret;
}
fpwm = !!(val & MAX77620_SD_FPWM_MASK);
}
switch (pm_mode) {
case MAX77620_POWER_MODE_NORMAL:
case MAX77620_POWER_MODE_DISABLE:
if (fpwm)
reg_mode = REGULATOR_MODE_FAST;
else
reg_mode = REGULATOR_MODE_NORMAL;
break;
case MAX77620_POWER_MODE_LPM:
case MAX77620_POWER_MODE_GLPM:
reg_mode = REGULATOR_MODE_IDLE;
break;
default:
return 0;
}
return reg_mode;
}
static int max77620_regulator_set_ramp_delay(struct regulator_dev *rdev,
int ramp_delay)
{
struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
/* Device specific ramp rate setting tells that platform has
* different ramp rate from advertised value. In this case,
* do not configure anything and just return success.
*/
if (rpdata->ramp_rate_setting)
return 0;
return max77620_set_slew_rate(pmic, id, ramp_delay);
}
static int max77620_of_parse_cb(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *config)
{
struct max77620_regulator *pmic = config->driver_data;
struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[desc->id];
u32 pval;
int ret;
ret = of_property_read_u32(np, "maxim,active-fps-source", &pval);
rpdata->active_fps_src = (!ret) ? pval : MAX77620_FPS_SRC_DEF;
ret = of_property_read_u32(np, "maxim,active-fps-power-up-slot", &pval);
rpdata->active_fps_pu_slot = (!ret) ? pval : -1;
ret = of_property_read_u32(
np, "maxim,active-fps-power-down-slot", &pval);
rpdata->active_fps_pd_slot = (!ret) ? pval : -1;
ret = of_property_read_u32(np, "maxim,suspend-fps-source", &pval);
rpdata->suspend_fps_src = (!ret) ? pval : -1;
ret = of_property_read_u32(
np, "maxim,suspend-fps-power-up-slot", &pval);
rpdata->suspend_fps_pu_slot = (!ret) ? pval : -1;
ret = of_property_read_u32(
np, "maxim,suspend-fps-power-down-slot", &pval);
rpdata->suspend_fps_pd_slot = (!ret) ? pval : -1;
ret = of_property_read_u32(np, "maxim,ramp-rate-setting", &pval);
rpdata->ramp_rate_setting = (!ret) ? pval : 0;
return max77620_init_pmic(pmic, desc->id);
}
static struct regulator_ops max77620_regulator_ops = {
.is_enabled = max77620_regulator_is_enabled,
.enable = max77620_regulator_enable,
.disable = max77620_regulator_disable,
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_mode = max77620_regulator_set_mode,
.get_mode = max77620_regulator_get_mode,
.set_ramp_delay = max77620_regulator_set_ramp_delay,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.set_active_discharge = regulator_set_active_discharge_regmap,
};
#define MAX77620_SD_CNF2_ROVS_EN_NONE 0
#define RAIL_SD(_id, _name, _sname, _volt_mask, _min_uV, _max_uV, \
_step_uV, _rs_add, _rs_mask) \
[MAX77620_REGULATOR_ID_##_id] = { \
.type = MAX77620_REGULATOR_TYPE_SD, \
.volt_addr = MAX77620_REG_##_id, \
.cfg_addr = MAX77620_REG_##_id##_CFG, \
.fps_addr = MAX77620_REG_FPS_##_id, \
.remote_sense_addr = _rs_add, \
.remote_sense_mask = MAX77620_SD_CNF2_ROVS_EN_##_rs_mask, \
.power_mode_mask = MAX77620_SD_POWER_MODE_MASK, \
.power_mode_shift = MAX77620_SD_POWER_MODE_SHIFT, \
.desc = { \
.name = max77620_rails(_name), \
.of_match = of_match_ptr(#_name), \
.regulators_node = of_match_ptr("regulators"), \
.of_parse_cb = max77620_of_parse_cb, \
.supply_name = _sname, \
.id = MAX77620_REGULATOR_ID_##_id, \
.ops = &max77620_regulator_ops, \
.n_voltages = ((_max_uV - _min_uV) / _step_uV) + 1, \
.min_uV = _min_uV, \
.uV_step = _step_uV, \
.enable_time = 500, \
.vsel_mask = MAX77620_##_volt_mask##_VOLT_MASK, \
.vsel_reg = MAX77620_REG_##_id, \
.active_discharge_off = 0, \
.active_discharge_on = MAX77620_SD_CFG1_ADE_ENABLE, \
.active_discharge_mask = MAX77620_SD_CFG1_ADE_MASK, \
.active_discharge_reg = MAX77620_REG_##_id##_CFG, \
.type = REGULATOR_VOLTAGE, \
}, \
}
#define RAIL_LDO(_id, _name, _sname, _type, _min_uV, _max_uV, _step_uV) \
[MAX77620_REGULATOR_ID_##_id] = { \
.type = MAX77620_REGULATOR_TYPE_LDO_##_type, \
.volt_addr = MAX77620_REG_##_id##_CFG, \
.cfg_addr = MAX77620_REG_##_id##_CFG2, \
.fps_addr = MAX77620_REG_FPS_##_id, \
.remote_sense_addr = 0xFF, \
.power_mode_mask = MAX77620_LDO_POWER_MODE_MASK, \
.power_mode_shift = MAX77620_LDO_POWER_MODE_SHIFT, \
.desc = { \
.name = max77620_rails(_name), \
.of_match = of_match_ptr(#_name), \
.regulators_node = of_match_ptr("regulators"), \
.of_parse_cb = max77620_of_parse_cb, \
.supply_name = _sname, \
.id = MAX77620_REGULATOR_ID_##_id, \
.ops = &max77620_regulator_ops, \
.n_voltages = ((_max_uV - _min_uV) / _step_uV) + 1, \
.min_uV = _min_uV, \
.uV_step = _step_uV, \
.enable_time = 500, \
.vsel_mask = MAX77620_LDO_VOLT_MASK, \
.vsel_reg = MAX77620_REG_##_id##_CFG, \
.active_discharge_off = 0, \
.active_discharge_on = MAX77620_LDO_CFG2_ADE_ENABLE, \
.active_discharge_mask = MAX77620_LDO_CFG2_ADE_MASK, \
.active_discharge_reg = MAX77620_REG_##_id##_CFG2, \
.type = REGULATOR_VOLTAGE, \
}, \
}
static struct max77620_regulator_info max77620_regs_info[MAX77620_NUM_REGS] = {
RAIL_SD(SD0, sd0, "in-sd0", SD0, 600000, 1400000, 12500, 0x22, SD0),
RAIL_SD(SD1, sd1, "in-sd1", SD1, 600000, 1550000, 12500, 0x22, SD1),
RAIL_SD(SD2, sd2, "in-sd2", SDX, 600000, 3787500, 12500, 0xFF, NONE),
RAIL_SD(SD3, sd3, "in-sd3", SDX, 600000, 3787500, 12500, 0xFF, NONE),
RAIL_SD(SD4, sd4, "in-sd4", SDX, 600000, 3787500, 12500, 0xFF, NONE),
RAIL_LDO(LDO0, ldo0, "in-ldo0-1", N, 800000, 2375000, 25000),
RAIL_LDO(LDO1, ldo1, "in-ldo0-1", N, 800000, 2375000, 25000),
RAIL_LDO(LDO2, ldo2, "in-ldo2", P, 800000, 3950000, 50000),
RAIL_LDO(LDO3, ldo3, "in-ldo3-5", P, 800000, 3950000, 50000),
RAIL_LDO(LDO4, ldo4, "in-ldo4-6", P, 800000, 1587500, 12500),
RAIL_LDO(LDO5, ldo5, "in-ldo3-5", P, 800000, 3950000, 50000),
RAIL_LDO(LDO6, ldo6, "in-ldo4-6", P, 800000, 3950000, 50000),
RAIL_LDO(LDO7, ldo7, "in-ldo7-8", N, 800000, 3950000, 50000),
RAIL_LDO(LDO8, ldo8, "in-ldo7-8", N, 800000, 3950000, 50000),
};
static struct max77620_regulator_info max20024_regs_info[MAX77620_NUM_REGS] = {
RAIL_SD(SD0, sd0, "in-sd0", SD0, 800000, 1587500, 12500, 0x22, SD0),
RAIL_SD(SD1, sd1, "in-sd1", SD1, 600000, 3387500, 12500, 0x22, SD1),
RAIL_SD(SD2, sd2, "in-sd2", SDX, 600000, 3787500, 12500, 0xFF, NONE),
RAIL_SD(SD3, sd3, "in-sd3", SDX, 600000, 3787500, 12500, 0xFF, NONE),
RAIL_SD(SD4, sd4, "in-sd4", SDX, 600000, 3787500, 12500, 0xFF, NONE),
RAIL_LDO(LDO0, ldo0, "in-ldo0-1", N, 800000, 2375000, 25000),
RAIL_LDO(LDO1, ldo1, "in-ldo0-1", N, 800000, 2375000, 25000),
RAIL_LDO(LDO2, ldo2, "in-ldo2", P, 800000, 3950000, 50000),
RAIL_LDO(LDO3, ldo3, "in-ldo3-5", P, 800000, 3950000, 50000),
RAIL_LDO(LDO4, ldo4, "in-ldo4-6", P, 800000, 1587500, 12500),
RAIL_LDO(LDO5, ldo5, "in-ldo3-5", P, 800000, 3950000, 50000),
RAIL_LDO(LDO6, ldo6, "in-ldo4-6", P, 800000, 3950000, 50000),
RAIL_LDO(LDO7, ldo7, "in-ldo7-8", N, 800000, 3950000, 50000),
RAIL_LDO(LDO8, ldo8, "in-ldo7-8", N, 800000, 3950000, 50000),
};
static int max77620_regulator_probe(struct platform_device *pdev)
{
struct max77620_chip *max77620_chip = dev_get_drvdata(pdev->dev.parent);
struct max77620_regulator_info *rinfo;
struct device *dev = &pdev->dev;
struct regulator_config config = { };
struct max77620_regulator *pmic;
int ret = 0;
int id;
pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
if (!pmic)
return -ENOMEM;
platform_set_drvdata(pdev, pmic);
pmic->dev = dev;
pmic->rmap = max77620_chip->rmap;
if (!dev->of_node)
dev->of_node = pdev->dev.parent->of_node;
switch (max77620_chip->chip_id) {
case MAX77620:
rinfo = max77620_regs_info;
break;
default:
rinfo = max20024_regs_info;
break;
}
config.regmap = pmic->rmap;
config.dev = dev;
config.driver_data = pmic;
for (id = 0; id < MAX77620_NUM_REGS; id++) {
struct regulator_dev *rdev;
struct regulator_desc *rdesc;
if ((max77620_chip->chip_id == MAX77620) &&
(id == MAX77620_REGULATOR_ID_SD4))
continue;
rdesc = &rinfo[id].desc;
pmic->rinfo[id] = &max77620_regs_info[id];
pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL;
ret = max77620_read_slew_rate(pmic, id);
if (ret < 0)
return ret;
rdev = devm_regulator_register(dev, rdesc, &config);
if (IS_ERR(rdev)) {
ret = PTR_ERR(rdev);
dev_err(dev, "Regulator registration %s failed: %d\n",
rdesc->name, ret);
return ret;
}
}
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int max77620_regulator_suspend(struct device *dev)
{
struct max77620_regulator *pmic = dev_get_drvdata(dev);
struct max77620_regulator_pdata *reg_pdata;
int id;
for (id = 0; id < MAX77620_NUM_REGS; id++) {
reg_pdata = &pmic->reg_pdata[id];
max77620_regulator_set_fps_slots(pmic, id, true);
if (reg_pdata->suspend_fps_src < 0)
continue;
max77620_regulator_set_fps_src(pmic, reg_pdata->suspend_fps_src,
id);
}
return 0;
}
static int max77620_regulator_resume(struct device *dev)
{
struct max77620_regulator *pmic = dev_get_drvdata(dev);
struct max77620_regulator_pdata *reg_pdata;
int id;
for (id = 0; id < MAX77620_NUM_REGS; id++) {
reg_pdata = &pmic->reg_pdata[id];
max77620_regulator_set_fps_slots(pmic, id, false);
if (reg_pdata->active_fps_src < 0)
continue;
max77620_regulator_set_fps_src(pmic, reg_pdata->active_fps_src,
id);
}
return 0;
}
#endif
static const struct dev_pm_ops max77620_regulator_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(max77620_regulator_suspend,
max77620_regulator_resume)
};
static const struct platform_device_id max77620_regulator_devtype[] = {
{ .name = "max77620-pmic", },
{ .name = "max20024-pmic", },
{},
};
MODULE_DEVICE_TABLE(platform, max77620_regulator_devtype);
static struct platform_driver max77620_regulator_driver = {
.probe = max77620_regulator_probe,
.id_table = max77620_regulator_devtype,
.driver = {
.name = "max77620-pmic",
.pm = &max77620_regulator_pm_ops,
},
};
module_platform_driver(max77620_regulator_driver);
MODULE_DESCRIPTION("MAX77620/MAX20024 regulator driver");
MODULE_AUTHOR("Mallikarjun Kasoju <mkasoju@nvidia.com>");
MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
MODULE_LICENSE("GPL v2");
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