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kernel_optimize_test/drivers/regulator/max77620-regulator.c
Colin Ian King a3c7c029c3
regulator: max77620: remove redundant assignment to variable ret 
The variable ret is being initialized with a value that is never
read and it is being updated later with a new value. The
initialization is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20190703082009.18779-1-colin.king@canonical.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-07-03 13:02:38 +01:00

924 lines
24 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Maxim MAX77620 Regulator driver
*
* Copyright (c) 2016-2018, NVIDIA CORPORATION. All rights reserved.
*
* Author: Mallikarjun Kasoju <mkasoju@nvidia.com>
* Laxman Dewangan <ldewangan@nvidia.com>
*/
#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 {
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 power_ok;
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;
if (!rinfo)
return 0;
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 (!rinfo)
return 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_config_power_ok(struct max77620_regulator *pmic, int id)
{
struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
struct max77620_regulator_info *rinfo = pmic->rinfo[id];
struct max77620_chip *chip = dev_get_drvdata(pmic->dev->parent);
u8 val, mask;
int ret;
switch (chip->chip_id) {
case MAX20024:
if (rpdata->power_ok >= 0) {
if (rinfo->type == MAX77620_REGULATOR_TYPE_SD)
mask = MAX20024_SD_CFG1_MPOK_MASK;
else
mask = MAX20024_LDO_CFG2_MPOK_MASK;
val = rpdata->power_ok ? mask : 0;
ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr,
mask, val);
if (ret < 0) {
dev_err(pmic->dev, "Reg 0x%02x update failed %d\n",
rinfo->cfg_addr, ret);
return ret;
}
}
break;
default:
break;
}
return 0;
}
static int max77620_init_pmic(struct max77620_regulator *pmic, int id)
{
struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
int ret;
max77620_config_power_ok(pmic, id);
/* 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;
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,power-ok-control", &pval);
if (!ret)
rpdata->power_ok = pval;
else
rpdata->power_ok = -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 const 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, \
.owner = THIS_MODULE, \
}, \
}
#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, \
.owner = THIS_MODULE, \
}, \
}
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_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 struct max77620_regulator_info max77663_regs_info[MAX77620_NUM_REGS] = {
RAIL_SD(SD0, sd0, "in-sd0", SD0, 600000, 3387500, 12500, 0xFF, NONE),
RAIL_SD(SD1, sd1, "in-sd1", SD1, 800000, 1587500, 12500, 0xFF, NONE),
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;
case MAX20024:
rinfo = max20024_regs_info;
break;
case MAX77663:
rinfo = max77663_regs_info;
break;
default:
return -EINVAL;
}
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] = &rinfo[id];
pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL;
pmic->reg_pdata[id].active_fps_src = -1;
pmic->reg_pdata[id].active_fps_pd_slot = -1;
pmic->reg_pdata[id].active_fps_pu_slot = -1;
pmic->reg_pdata[id].suspend_fps_src = -1;
pmic->reg_pdata[id].suspend_fps_pd_slot = -1;
pmic->reg_pdata[id].suspend_fps_pu_slot = -1;
pmic->reg_pdata[id].power_ok = -1;
pmic->reg_pdata[id].ramp_rate_setting = -1;
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_config_power_ok(pmic, 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", },
{ .name = "max77663-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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