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linux-next/drivers/regulator/as3722-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-or-later
/*
* Voltage regulator support for AMS AS3722 PMIC
*
* Copyright (C) 2013 ams
*
* Author: Florian Lobmaier <florian.lobmaier@ams.com>
* Author: Laxman Dewangan <ldewangan@nvidia.com>
*/
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mfd/as3722.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>
/* Regulator IDs */
enum as3722_regulators_id {
AS3722_REGULATOR_ID_SD0,
AS3722_REGULATOR_ID_SD1,
AS3722_REGULATOR_ID_SD2,
AS3722_REGULATOR_ID_SD3,
AS3722_REGULATOR_ID_SD4,
AS3722_REGULATOR_ID_SD5,
AS3722_REGULATOR_ID_SD6,
AS3722_REGULATOR_ID_LDO0,
AS3722_REGULATOR_ID_LDO1,
AS3722_REGULATOR_ID_LDO2,
AS3722_REGULATOR_ID_LDO3,
AS3722_REGULATOR_ID_LDO4,
AS3722_REGULATOR_ID_LDO5,
AS3722_REGULATOR_ID_LDO6,
AS3722_REGULATOR_ID_LDO7,
AS3722_REGULATOR_ID_LDO9,
AS3722_REGULATOR_ID_LDO10,
AS3722_REGULATOR_ID_LDO11,
AS3722_REGULATOR_ID_MAX,
};
struct as3722_register_mapping {
u8 regulator_id;
const char *name;
const char *sname;
u8 vsel_reg;
u8 vsel_mask;
int n_voltages;
u32 enable_reg;
u8 enable_mask;
u32 control_reg;
u8 mode_mask;
u32 sleep_ctrl_reg;
u8 sleep_ctrl_mask;
};
struct as3722_regulator_config_data {
struct regulator_init_data *reg_init;
bool enable_tracking;
int ext_control;
};
struct as3722_regulators {
struct device *dev;
struct as3722 *as3722;
struct regulator_desc desc[AS3722_REGULATOR_ID_MAX];
struct as3722_regulator_config_data
reg_config_data[AS3722_REGULATOR_ID_MAX];
};
static const struct as3722_register_mapping as3722_reg_lookup[] = {
{
.regulator_id = AS3722_REGULATOR_ID_SD0,
.name = "as3722-sd0",
.vsel_reg = AS3722_SD0_VOLTAGE_REG,
.vsel_mask = AS3722_SD_VSEL_MASK,
.enable_reg = AS3722_SD_CONTROL_REG,
.enable_mask = AS3722_SDn_CTRL(0),
.sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
.sleep_ctrl_mask = AS3722_SD0_EXT_ENABLE_MASK,
.control_reg = AS3722_SD0_CONTROL_REG,
.mode_mask = AS3722_SD0_MODE_FAST,
},
{
.regulator_id = AS3722_REGULATOR_ID_SD1,
.name = "as3722-sd1",
.vsel_reg = AS3722_SD1_VOLTAGE_REG,
.vsel_mask = AS3722_SD_VSEL_MASK,
.enable_reg = AS3722_SD_CONTROL_REG,
.enable_mask = AS3722_SDn_CTRL(1),
.sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
.sleep_ctrl_mask = AS3722_SD1_EXT_ENABLE_MASK,
.control_reg = AS3722_SD1_CONTROL_REG,
.mode_mask = AS3722_SD1_MODE_FAST,
},
{
.regulator_id = AS3722_REGULATOR_ID_SD2,
.name = "as3722-sd2",
.sname = "vsup-sd2",
.vsel_reg = AS3722_SD2_VOLTAGE_REG,
.vsel_mask = AS3722_SD_VSEL_MASK,
.enable_reg = AS3722_SD_CONTROL_REG,
.enable_mask = AS3722_SDn_CTRL(2),
.sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
.sleep_ctrl_mask = AS3722_SD2_EXT_ENABLE_MASK,
.control_reg = AS3722_SD23_CONTROL_REG,
.mode_mask = AS3722_SD2_MODE_FAST,
.n_voltages = AS3722_SD2_VSEL_MAX + 1,
},
{
.regulator_id = AS3722_REGULATOR_ID_SD3,
.name = "as3722-sd3",
.sname = "vsup-sd3",
.vsel_reg = AS3722_SD3_VOLTAGE_REG,
.vsel_mask = AS3722_SD_VSEL_MASK,
.enable_reg = AS3722_SD_CONTROL_REG,
.enable_mask = AS3722_SDn_CTRL(3),
.sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
.sleep_ctrl_mask = AS3722_SD3_EXT_ENABLE_MASK,
.control_reg = AS3722_SD23_CONTROL_REG,
.mode_mask = AS3722_SD3_MODE_FAST,
.n_voltages = AS3722_SD2_VSEL_MAX + 1,
},
{
.regulator_id = AS3722_REGULATOR_ID_SD4,
.name = "as3722-sd4",
.sname = "vsup-sd4",
.vsel_reg = AS3722_SD4_VOLTAGE_REG,
.vsel_mask = AS3722_SD_VSEL_MASK,
.enable_reg = AS3722_SD_CONTROL_REG,
.enable_mask = AS3722_SDn_CTRL(4),
.sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
.sleep_ctrl_mask = AS3722_SD4_EXT_ENABLE_MASK,
.control_reg = AS3722_SD4_CONTROL_REG,
.mode_mask = AS3722_SD4_MODE_FAST,
.n_voltages = AS3722_SD2_VSEL_MAX + 1,
},
{
.regulator_id = AS3722_REGULATOR_ID_SD5,
.name = "as3722-sd5",
.sname = "vsup-sd5",
.vsel_reg = AS3722_SD5_VOLTAGE_REG,
.vsel_mask = AS3722_SD_VSEL_MASK,
.enable_reg = AS3722_SD_CONTROL_REG,
.enable_mask = AS3722_SDn_CTRL(5),
.sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
.sleep_ctrl_mask = AS3722_SD5_EXT_ENABLE_MASK,
.control_reg = AS3722_SD5_CONTROL_REG,
.mode_mask = AS3722_SD5_MODE_FAST,
.n_voltages = AS3722_SD2_VSEL_MAX + 1,
},
{
.regulator_id = AS3722_REGULATOR_ID_SD6,
.name = "as3722-sd6",
.vsel_reg = AS3722_SD6_VOLTAGE_REG,
.vsel_mask = AS3722_SD_VSEL_MASK,
.enable_reg = AS3722_SD_CONTROL_REG,
.enable_mask = AS3722_SDn_CTRL(6),
.sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
.sleep_ctrl_mask = AS3722_SD6_EXT_ENABLE_MASK,
.control_reg = AS3722_SD6_CONTROL_REG,
.mode_mask = AS3722_SD6_MODE_FAST,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO0,
.name = "as3722-ldo0",
.sname = "vin-ldo0",
.vsel_reg = AS3722_LDO0_VOLTAGE_REG,
.vsel_mask = AS3722_LDO0_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO0_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
.sleep_ctrl_mask = AS3722_LDO0_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO0_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO1,
.name = "as3722-ldo1",
.sname = "vin-ldo1-6",
.vsel_reg = AS3722_LDO1_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO1_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
.sleep_ctrl_mask = AS3722_LDO1_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO2,
.name = "as3722-ldo2",
.sname = "vin-ldo2-5-7",
.vsel_reg = AS3722_LDO2_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO2_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
.sleep_ctrl_mask = AS3722_LDO2_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO3,
.name = "as3722-ldo3",
.sname = "vin-ldo3-4",
.vsel_reg = AS3722_LDO3_VOLTAGE_REG,
.vsel_mask = AS3722_LDO3_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO3_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
.sleep_ctrl_mask = AS3722_LDO3_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO3_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO4,
.name = "as3722-ldo4",
.sname = "vin-ldo3-4",
.vsel_reg = AS3722_LDO4_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO4_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
.sleep_ctrl_mask = AS3722_LDO4_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO5,
.name = "as3722-ldo5",
.sname = "vin-ldo2-5-7",
.vsel_reg = AS3722_LDO5_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO5_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
.sleep_ctrl_mask = AS3722_LDO5_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO6,
.name = "as3722-ldo6",
.sname = "vin-ldo1-6",
.vsel_reg = AS3722_LDO6_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO6_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
.sleep_ctrl_mask = AS3722_LDO6_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO7,
.name = "as3722-ldo7",
.sname = "vin-ldo2-5-7",
.vsel_reg = AS3722_LDO7_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO7_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
.sleep_ctrl_mask = AS3722_LDO7_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO9,
.name = "as3722-ldo9",
.sname = "vin-ldo9-10",
.vsel_reg = AS3722_LDO9_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL1_REG,
.enable_mask = AS3722_LDO9_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
.sleep_ctrl_mask = AS3722_LDO9_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO10,
.name = "as3722-ldo10",
.sname = "vin-ldo9-10",
.vsel_reg = AS3722_LDO10_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL1_REG,
.enable_mask = AS3722_LDO10_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
.sleep_ctrl_mask = AS3722_LDO10_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO11,
.name = "as3722-ldo11",
.sname = "vin-ldo11",
.vsel_reg = AS3722_LDO11_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL1_REG,
.enable_mask = AS3722_LDO11_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
.sleep_ctrl_mask = AS3722_LDO11_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
};
static const unsigned int as3722_ldo_current[] = { 150000, 300000 };
static const unsigned int as3722_sd016_current[] = {
2500000, 3000000, 3500000
};
static const struct regulator_ops as3722_ldo0_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.list_voltage = regulator_list_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
};
static const struct regulator_ops as3722_ldo0_extcntrl_ops = {
.list_voltage = regulator_list_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
};
static int as3722_ldo3_set_tracking_mode(struct as3722_regulators *as3722_reg,
int id, u8 mode)
{
struct as3722 *as3722 = as3722_reg->as3722;
switch (mode) {
case AS3722_LDO3_MODE_PMOS:
case AS3722_LDO3_MODE_PMOS_TRACKING:
case AS3722_LDO3_MODE_NMOS:
case AS3722_LDO3_MODE_SWITCH:
return as3722_update_bits(as3722,
as3722_reg_lookup[id].vsel_reg,
AS3722_LDO3_MODE_MASK, mode);
default:
return -EINVAL;
}
}
static int as3722_ldo3_get_current_limit(struct regulator_dev *rdev)
{
return 150000;
}
static const struct regulator_ops as3722_ldo3_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.list_voltage = regulator_list_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_current_limit = as3722_ldo3_get_current_limit,
};
static const struct regulator_ops as3722_ldo3_extcntrl_ops = {
.list_voltage = regulator_list_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_current_limit = as3722_ldo3_get_current_limit,
};
static const struct regulator_ops as3722_ldo6_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.get_bypass = regulator_get_bypass_regmap,
.set_bypass = regulator_set_bypass_regmap,
};
static const struct regulator_ops as3722_ldo6_extcntrl_ops = {
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.get_bypass = regulator_get_bypass_regmap,
.set_bypass = regulator_set_bypass_regmap,
};
static const struct linear_range as3722_ldo_ranges[] = {
REGULATOR_LINEAR_RANGE(0, 0x00, 0x00, 0),
REGULATOR_LINEAR_RANGE(825000, 0x01, 0x24, 25000),
REGULATOR_LINEAR_RANGE(1725000, 0x40, 0x7F, 25000),
};
static const struct regulator_ops as3722_ldo_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
};
static const struct regulator_ops as3722_ldo_extcntrl_ops = {
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
};
static unsigned int as3722_sd_get_mode(struct regulator_dev *rdev)
{
struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
struct as3722 *as3722 = as3722_regs->as3722;
int id = rdev_get_id(rdev);
u32 val;
int ret;
if (!as3722_reg_lookup[id].control_reg)
return -ENOTSUPP;
ret = as3722_read(as3722, as3722_reg_lookup[id].control_reg, &val);
if (ret < 0) {
dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
as3722_reg_lookup[id].control_reg, ret);
return ret;
}
if (val & as3722_reg_lookup[id].mode_mask)
return REGULATOR_MODE_FAST;
else
return REGULATOR_MODE_NORMAL;
}
static int as3722_sd_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
struct as3722 *as3722 = as3722_regs->as3722;
u8 id = rdev_get_id(rdev);
u8 val = 0;
int ret;
if (!as3722_reg_lookup[id].control_reg)
return -ERANGE;
switch (mode) {
case REGULATOR_MODE_FAST:
val = as3722_reg_lookup[id].mode_mask;
fallthrough;
case REGULATOR_MODE_NORMAL:
break;
default:
return -EINVAL;
}
ret = as3722_update_bits(as3722, as3722_reg_lookup[id].control_reg,
as3722_reg_lookup[id].mode_mask, val);
if (ret < 0) {
dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
as3722_reg_lookup[id].control_reg, ret);
return ret;
}
return ret;
}
static bool as3722_sd0_is_low_voltage(struct as3722_regulators *as3722_regs)
{
int err;
unsigned val;
err = as3722_read(as3722_regs->as3722, AS3722_FUSE7_REG, &val);
if (err < 0) {
dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
AS3722_FUSE7_REG, err);
return false;
}
if (val & AS3722_FUSE7_SD0_LOW_VOLTAGE)
return true;
return false;
}
static const struct linear_range as3722_sd2345_ranges[] = {
REGULATOR_LINEAR_RANGE(0, 0x00, 0x00, 0),
REGULATOR_LINEAR_RANGE(612500, 0x01, 0x40, 12500),
REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000),
REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7F, 50000),
};
static const struct regulator_ops as3722_sd016_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.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,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.get_mode = as3722_sd_get_mode,
.set_mode = as3722_sd_set_mode,
};
static const struct regulator_ops as3722_sd016_extcntrl_ops = {
.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,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.get_mode = as3722_sd_get_mode,
.set_mode = as3722_sd_set_mode,
};
static const struct regulator_ops as3722_sd2345_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.get_mode = as3722_sd_get_mode,
.set_mode = as3722_sd_set_mode,
};
static const struct regulator_ops as3722_sd2345_extcntrl_ops = {
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.get_mode = as3722_sd_get_mode,
.set_mode = as3722_sd_set_mode,
};
static int as3722_extreg_init(struct as3722_regulators *as3722_regs, int id,
int ext_pwr_ctrl)
{
int ret;
unsigned int val;
if ((ext_pwr_ctrl < AS3722_EXT_CONTROL_ENABLE1) ||
(ext_pwr_ctrl > AS3722_EXT_CONTROL_ENABLE3))
return -EINVAL;
val = ext_pwr_ctrl << (ffs(as3722_reg_lookup[id].sleep_ctrl_mask) - 1);
ret = as3722_update_bits(as3722_regs->as3722,
as3722_reg_lookup[id].sleep_ctrl_reg,
as3722_reg_lookup[id].sleep_ctrl_mask, val);
if (ret < 0)
dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
as3722_reg_lookup[id].sleep_ctrl_reg, ret);
return ret;
}
static struct of_regulator_match as3722_regulator_matches[] = {
{ .name = "sd0", },
{ .name = "sd1", },
{ .name = "sd2", },
{ .name = "sd3", },
{ .name = "sd4", },
{ .name = "sd5", },
{ .name = "sd6", },
{ .name = "ldo0", },
{ .name = "ldo1", },
{ .name = "ldo2", },
{ .name = "ldo3", },
{ .name = "ldo4", },
{ .name = "ldo5", },
{ .name = "ldo6", },
{ .name = "ldo7", },
{ .name = "ldo9", },
{ .name = "ldo10", },
{ .name = "ldo11", },
};
static int as3722_get_regulator_dt_data(struct platform_device *pdev,
struct as3722_regulators *as3722_regs)
{
struct device_node *np;
struct as3722_regulator_config_data *reg_config;
u32 prop;
int id;
int ret;
np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
if (!np) {
dev_err(&pdev->dev, "Device is not having regulators node\n");
return -ENODEV;
}
pdev->dev.of_node = np;
ret = of_regulator_match(&pdev->dev, np, as3722_regulator_matches,
ARRAY_SIZE(as3722_regulator_matches));
of_node_put(np);
if (ret < 0) {
dev_err(&pdev->dev, "Parsing of regulator node failed: %d\n",
ret);
return ret;
}
for (id = 0; id < ARRAY_SIZE(as3722_regulator_matches); ++id) {
struct device_node *reg_node;
reg_config = &as3722_regs->reg_config_data[id];
reg_config->reg_init = as3722_regulator_matches[id].init_data;
reg_node = as3722_regulator_matches[id].of_node;
if (!reg_config->reg_init || !reg_node)
continue;
ret = of_property_read_u32(reg_node, "ams,ext-control", &prop);
if (!ret) {
if (prop < 3)
reg_config->ext_control = prop;
else
dev_warn(&pdev->dev,
"ext-control have invalid option: %u\n",
prop);
}
reg_config->enable_tracking =
of_property_read_bool(reg_node, "ams,enable-tracking");
}
return 0;
}
static int as3722_regulator_probe(struct platform_device *pdev)
{
struct as3722 *as3722 = dev_get_drvdata(pdev->dev.parent);
struct as3722_regulators *as3722_regs;
struct as3722_regulator_config_data *reg_config;
struct regulator_dev *rdev;
struct regulator_config config = { };
const struct regulator_ops *ops;
int id;
int ret;
as3722_regs = devm_kzalloc(&pdev->dev, sizeof(*as3722_regs),
GFP_KERNEL);
if (!as3722_regs)
return -ENOMEM;
as3722_regs->dev = &pdev->dev;
as3722_regs->as3722 = as3722;
platform_set_drvdata(pdev, as3722_regs);
ret = as3722_get_regulator_dt_data(pdev, as3722_regs);
if (ret < 0)
return ret;
config.dev = &pdev->dev;
config.driver_data = as3722_regs;
config.regmap = as3722->regmap;
for (id = 0; id < AS3722_REGULATOR_ID_MAX; id++) {
struct regulator_desc *desc;
desc = &as3722_regs->desc[id];
reg_config = &as3722_regs->reg_config_data[id];
desc->name = as3722_reg_lookup[id].name;
desc->supply_name = as3722_reg_lookup[id].sname;
desc->id = as3722_reg_lookup[id].regulator_id;
desc->n_voltages = as3722_reg_lookup[id].n_voltages;
desc->type = REGULATOR_VOLTAGE;
desc->owner = THIS_MODULE;
desc->enable_reg = as3722_reg_lookup[id].enable_reg;
desc->enable_mask = as3722_reg_lookup[id].enable_mask;
desc->vsel_reg = as3722_reg_lookup[id].vsel_reg;
desc->vsel_mask = as3722_reg_lookup[id].vsel_mask;
switch (id) {
case AS3722_REGULATOR_ID_LDO0:
if (reg_config->ext_control)
ops = &as3722_ldo0_extcntrl_ops;
else
ops = &as3722_ldo0_ops;
desc->min_uV = 825000;
desc->uV_step = 25000;
desc->linear_min_sel = 1;
desc->enable_time = 500;
desc->curr_table = as3722_ldo_current;
desc->n_current_limits = ARRAY_SIZE(as3722_ldo_current);
desc->csel_reg = as3722_reg_lookup[id].vsel_reg;
desc->csel_mask = AS3722_LDO_ILIMIT_MASK;
break;
case AS3722_REGULATOR_ID_LDO3:
if (reg_config->ext_control)
ops = &as3722_ldo3_extcntrl_ops;
else
ops = &as3722_ldo3_ops;
desc->min_uV = 620000;
desc->uV_step = 20000;
desc->linear_min_sel = 1;
desc->enable_time = 500;
if (reg_config->enable_tracking) {
ret = as3722_ldo3_set_tracking_mode(as3722_regs,
id, AS3722_LDO3_MODE_PMOS_TRACKING);
if (ret < 0) {
dev_err(&pdev->dev,
"LDO3 tracking failed: %d\n",
ret);
return ret;
}
}
break;
case AS3722_REGULATOR_ID_LDO6:
if (reg_config->ext_control)
ops = &as3722_ldo6_extcntrl_ops;
else
ops = &as3722_ldo6_ops;
desc->enable_time = 500;
desc->bypass_reg = AS3722_LDO6_VOLTAGE_REG;
desc->bypass_mask = AS3722_LDO_VSEL_MASK;
desc->bypass_val_on = AS3722_LDO6_VSEL_BYPASS;
desc->bypass_val_off = AS3722_LDO6_VSEL_BYPASS;
desc->linear_ranges = as3722_ldo_ranges;
desc->n_linear_ranges = ARRAY_SIZE(as3722_ldo_ranges);
desc->curr_table = as3722_ldo_current;
desc->n_current_limits = ARRAY_SIZE(as3722_ldo_current);
desc->csel_reg = as3722_reg_lookup[id].vsel_reg;
desc->csel_mask = AS3722_LDO_ILIMIT_MASK;
break;
case AS3722_REGULATOR_ID_SD0:
case AS3722_REGULATOR_ID_SD1:
case AS3722_REGULATOR_ID_SD6:
if (reg_config->ext_control)
ops = &as3722_sd016_extcntrl_ops;
else
ops = &as3722_sd016_ops;
if (id == AS3722_REGULATOR_ID_SD0 &&
as3722_sd0_is_low_voltage(as3722_regs)) {
as3722_regs->desc[id].n_voltages =
AS3722_SD0_VSEL_LOW_VOL_MAX + 1;
as3722_regs->desc[id].min_uV = 410000;
} else {
as3722_regs->desc[id].n_voltages =
AS3722_SD0_VSEL_MAX + 1;
as3722_regs->desc[id].min_uV = 610000;
}
desc->uV_step = 10000;
desc->linear_min_sel = 1;
desc->enable_time = 600;
desc->curr_table = as3722_sd016_current;
desc->n_current_limits =
ARRAY_SIZE(as3722_sd016_current);
if (id == AS3722_REGULATOR_ID_SD0) {
desc->csel_reg = AS3722_OVCURRENT_REG;
desc->csel_mask =
AS3722_OVCURRENT_SD0_TRIP_MASK;
} else if (id == AS3722_REGULATOR_ID_SD1) {
desc->csel_reg = AS3722_OVCURRENT_REG;
desc->csel_mask =
AS3722_OVCURRENT_SD1_TRIP_MASK;
} else if (id == AS3722_REGULATOR_ID_SD6) {
desc->csel_reg = AS3722_OVCURRENT_DEB_REG;
desc->csel_mask =
AS3722_OVCURRENT_SD6_TRIP_MASK;
}
break;
case AS3722_REGULATOR_ID_SD2:
case AS3722_REGULATOR_ID_SD3:
case AS3722_REGULATOR_ID_SD4:
case AS3722_REGULATOR_ID_SD5:
if (reg_config->ext_control)
ops = &as3722_sd2345_extcntrl_ops;
else
ops = &as3722_sd2345_ops;
desc->linear_ranges = as3722_sd2345_ranges;
desc->n_linear_ranges =
ARRAY_SIZE(as3722_sd2345_ranges);
break;
default:
if (reg_config->ext_control)
ops = &as3722_ldo_extcntrl_ops;
else
ops = &as3722_ldo_ops;
desc->enable_time = 500;
desc->linear_ranges = as3722_ldo_ranges;
desc->n_linear_ranges = ARRAY_SIZE(as3722_ldo_ranges);
desc->curr_table = as3722_ldo_current;
desc->n_current_limits = ARRAY_SIZE(as3722_ldo_current);
desc->csel_reg = as3722_reg_lookup[id].vsel_reg;
desc->csel_mask = AS3722_LDO_ILIMIT_MASK;
break;
}
desc->ops = ops;
config.init_data = reg_config->reg_init;
config.of_node = as3722_regulator_matches[id].of_node;
rdev = devm_regulator_register(&pdev->dev, desc, &config);
if (IS_ERR(rdev)) {
ret = PTR_ERR(rdev);
dev_err(&pdev->dev, "regulator %d register failed %d\n",
id, ret);
return ret;
}
if (reg_config->ext_control) {
ret = regulator_enable_regmap(rdev);
if (ret < 0) {
dev_err(&pdev->dev,
"Regulator %d enable failed: %d\n",
id, ret);
return ret;
}
ret = as3722_extreg_init(as3722_regs, id,
reg_config->ext_control);
if (ret < 0) {
dev_err(&pdev->dev,
"AS3722 ext control failed: %d", ret);
return ret;
}
}
}
return 0;
}
static const struct of_device_id of_as3722_regulator_match[] = {
{ .compatible = "ams,as3722-regulator", },
{},
};
MODULE_DEVICE_TABLE(of, of_as3722_regulator_match);
static struct platform_driver as3722_regulator_driver = {
.driver = {
.name = "as3722-regulator",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = of_as3722_regulator_match,
},
.probe = as3722_regulator_probe,
};
module_platform_driver(as3722_regulator_driver);
MODULE_ALIAS("platform:as3722-regulator");
MODULE_DESCRIPTION("AS3722 regulator driver");
MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>");
MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
MODULE_LICENSE("GPL");
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