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linux-next/drivers/regulator/max77620-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

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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;
/*
* Set of_node_reuse flag to prevent driver core from attempting to
* claim any pinmux resources already claimed by the parent device.
* Otherwise PMIC driver will fail to re-probe.
*/
device_set_of_node_from_dev(&pdev->dev, pdev->dev.parent);
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))
return dev_err_probe(dev, PTR_ERR(rdev),
"Regulator registration %s failed\n",
rdesc->name);
}
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",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.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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