mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-25 05:04:09 +08:00
7bf0a29c35
Fix below warning when CONFIG_OF=n:
drivers/regulator/max77826-regulator.c:277:34: warning: ‘max77826_of_match’ defined but not used [-Wunused-const-variable=]
277 | static const struct of_device_id max77826_of_match[] = {
| ^~~~~~~~~~~~~~~~~
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20200821111631.4e799c86@xhacker.debian
Signed-off-by: Mark Brown <broonie@kernel.org>
302 lines
7.9 KiB
C
302 lines
7.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
//
|
|
// max77826-regulator.c - regulator driver for Maxim MAX77826
|
|
//
|
|
// Author: Iskren Chernev <iskren.chernev@gmail.com>
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/err.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regulator/driver.h>
|
|
#include <linux/regulator/of_regulator.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/regmap.h>
|
|
|
|
enum max77826_registers {
|
|
MAX77826_REG_INT_SRC = 0x00,
|
|
MAX77826_REG_SYS_INT,
|
|
MAX77826_REG_INT1,
|
|
MAX77826_REG_INT2,
|
|
MAX77826_REG_BB_INT,
|
|
MAX77826_REG_INT_SRC_M,
|
|
MAX77826_REG_TOPSYS_INT_M,
|
|
MAX77826_REG_INT1_M,
|
|
MAX77826_REG_INT2_M,
|
|
MAX77826_REG_BB_INT_M,
|
|
MAX77826_REG_TOPSYS_STAT,
|
|
MAX77826_REG_STAT1,
|
|
MAX77826_REG_STAT2,
|
|
MAX77826_REG_BB_STAT,
|
|
/* 0x0E - 0x0F: Reserved */
|
|
MAX77826_REG_LDO_OPMD1 = 0x10,
|
|
MAX77826_REG_LDO_OPMD2,
|
|
MAX77826_REG_LDO_OPMD3,
|
|
MAX77826_REG_LDO_OPMD4,
|
|
MAX77826_REG_B_BB_OPMD,
|
|
/* 0x15 - 0x1F: Reserved */
|
|
MAX77826_REG_LDO1_CFG = 0x20,
|
|
MAX77826_REG_LDO2_CFG,
|
|
MAX77826_REG_LDO3_CFG,
|
|
MAX77826_REG_LDO4_CFG,
|
|
MAX77826_REG_LDO5_CFG,
|
|
MAX77826_REG_LDO6_CFG,
|
|
MAX77826_REG_LDO7_CFG,
|
|
MAX77826_REG_LDO8_CFG,
|
|
MAX77826_REG_LDO9_CFG,
|
|
MAX77826_REG_LDO10_CFG,
|
|
MAX77826_REG_LDO11_CFG,
|
|
MAX77826_REG_LDO12_CFG,
|
|
MAX77826_REG_LDO13_CFG,
|
|
MAX77826_REG_LDO14_CFG,
|
|
MAX77826_REG_LDO15_CFG,
|
|
/* 0x2F: Reserved */
|
|
MAX77826_REG_BUCK_CFG = 0x30,
|
|
MAX77826_REG_BUCK_VOUT,
|
|
MAX77826_REG_BB_CFG,
|
|
MAX77826_REG_BB_VOUT,
|
|
/* 0x34 - 0x3F: Reserved */
|
|
MAX77826_REG_BUCK_SS_FREQ = 0x40,
|
|
MAX77826_REG_UVLO_FALL,
|
|
/* 0x42 - 0xCE: Reserved */
|
|
MAX77826_REG_DEVICE_ID = 0xCF,
|
|
};
|
|
|
|
enum max77826_regulators {
|
|
MAX77826_LDO1 = 0,
|
|
MAX77826_LDO2,
|
|
MAX77826_LDO3,
|
|
MAX77826_LDO4,
|
|
MAX77826_LDO5,
|
|
MAX77826_LDO6,
|
|
MAX77826_LDO7,
|
|
MAX77826_LDO8,
|
|
MAX77826_LDO9,
|
|
MAX77826_LDO10,
|
|
MAX77826_LDO11,
|
|
MAX77826_LDO12,
|
|
MAX77826_LDO13,
|
|
MAX77826_LDO14,
|
|
MAX77826_LDO15,
|
|
MAX77826_BUCK,
|
|
MAX77826_BUCKBOOST,
|
|
MAX77826_MAX_REGULATORS,
|
|
};
|
|
|
|
#define MAX77826_MASK_LDO 0x7f
|
|
#define MAX77826_MASK_BUCK 0xff
|
|
#define MAX77826_MASK_BUCKBOOST 0x7f
|
|
#define MAX77826_BUCK_RAMP_DELAY 12500
|
|
|
|
/* values in mV */
|
|
/* for LDO1-3 */
|
|
#define MAX77826_NMOS_LDO_VOLT_MIN 600000
|
|
#define MAX77826_NMOS_LDO_VOLT_MAX 2187500
|
|
#define MAX77826_NMOS_LDO_VOLT_STEP 12500
|
|
|
|
/* for LDO4-15 */
|
|
#define MAX77826_PMOS_LDO_VOLT_MIN 800000
|
|
#define MAX77826_PMOS_LDO_VOLT_MAX 3975000
|
|
#define MAX77826_PMOS_LDO_VOLT_STEP 25000
|
|
|
|
/* for BUCK */
|
|
#define MAX77826_BUCK_VOLT_MIN 500000
|
|
#define MAX77826_BUCK_VOLT_MAX 1800000
|
|
#define MAX77826_BUCK_VOLT_STEP 6250
|
|
|
|
/* for BUCKBOOST */
|
|
#define MAX77826_BUCKBOOST_VOLT_MIN 2600000
|
|
#define MAX77826_BUCKBOOST_VOLT_MAX 4187500
|
|
#define MAX77826_BUCKBOOST_VOLT_STEP 12500
|
|
#define MAX77826_VOLT_RANGE(_type) \
|
|
((MAX77826_ ## _type ## _VOLT_MAX - \
|
|
MAX77826_ ## _type ## _VOLT_MIN) / \
|
|
MAX77826_ ## _type ## _VOLT_STEP + 1)
|
|
|
|
#define MAX77826_LDO(_id, _type) \
|
|
[MAX77826_LDO ## _id] = { \
|
|
.id = MAX77826_LDO ## _id, \
|
|
.name = "LDO"#_id, \
|
|
.of_match = of_match_ptr("LDO"#_id), \
|
|
.regulators_node = "regulators", \
|
|
.ops = &max77826_most_ops, \
|
|
.min_uV = MAX77826_ ## _type ## _LDO_VOLT_MIN, \
|
|
.uV_step = MAX77826_ ## _type ## _LDO_VOLT_STEP, \
|
|
.n_voltages = MAX77826_VOLT_RANGE(_type ## _LDO), \
|
|
.enable_reg = MAX77826_REG_LDO_OPMD1 + (_id - 1) / 4, \
|
|
.enable_mask = BIT(((_id - 1) % 4) * 2 + 1), \
|
|
.vsel_reg = MAX77826_REG_LDO1_CFG + (_id - 1), \
|
|
.vsel_mask = MAX77826_MASK_LDO, \
|
|
.owner = THIS_MODULE, \
|
|
}
|
|
|
|
#define MAX77826_BUCK(_idx, _id, _ops) \
|
|
[MAX77826_ ## _id] = { \
|
|
.id = MAX77826_ ## _id, \
|
|
.name = #_id, \
|
|
.of_match = of_match_ptr(#_id), \
|
|
.regulators_node = "regulators", \
|
|
.ops = &_ops, \
|
|
.min_uV = MAX77826_ ## _id ## _VOLT_MIN, \
|
|
.uV_step = MAX77826_ ## _id ## _VOLT_STEP, \
|
|
.n_voltages = MAX77826_VOLT_RANGE(_id), \
|
|
.enable_reg = MAX77826_REG_B_BB_OPMD, \
|
|
.enable_mask = BIT(_idx * 2 + 1), \
|
|
.vsel_reg = MAX77826_REG_BUCK_VOUT + _idx * 2, \
|
|
.vsel_mask = MAX77826_MASK_ ## _id, \
|
|
.owner = THIS_MODULE, \
|
|
}
|
|
|
|
|
|
|
|
struct max77826_regulator_info {
|
|
struct regmap *regmap;
|
|
struct regulator_desc *rdesc;
|
|
};
|
|
|
|
static const struct regmap_config max77826_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.max_register = MAX77826_REG_DEVICE_ID,
|
|
};
|
|
|
|
static int max77826_set_voltage_time_sel(struct regulator_dev *,
|
|
unsigned int old_selector,
|
|
unsigned int new_selector);
|
|
|
|
static const struct regulator_ops max77826_most_ops = {
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.is_enabled = regulator_is_enabled_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,
|
|
};
|
|
|
|
static const struct regulator_ops max77826_buck_ops = {
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.is_enabled = regulator_is_enabled_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,
|
|
.set_voltage_time_sel = max77826_set_voltage_time_sel,
|
|
};
|
|
|
|
static struct regulator_desc max77826_regulators_desc[] = {
|
|
MAX77826_LDO(1, NMOS),
|
|
MAX77826_LDO(2, NMOS),
|
|
MAX77826_LDO(3, NMOS),
|
|
MAX77826_LDO(4, PMOS),
|
|
MAX77826_LDO(5, PMOS),
|
|
MAX77826_LDO(6, PMOS),
|
|
MAX77826_LDO(7, PMOS),
|
|
MAX77826_LDO(8, PMOS),
|
|
MAX77826_LDO(9, PMOS),
|
|
MAX77826_LDO(10, PMOS),
|
|
MAX77826_LDO(11, PMOS),
|
|
MAX77826_LDO(12, PMOS),
|
|
MAX77826_LDO(13, PMOS),
|
|
MAX77826_LDO(14, PMOS),
|
|
MAX77826_LDO(15, PMOS),
|
|
MAX77826_BUCK(0, BUCK, max77826_buck_ops),
|
|
MAX77826_BUCK(1, BUCKBOOST, max77826_most_ops),
|
|
};
|
|
|
|
static int max77826_set_voltage_time_sel(struct regulator_dev *rdev,
|
|
unsigned int old_selector,
|
|
unsigned int new_selector)
|
|
{
|
|
if (new_selector > old_selector) {
|
|
return DIV_ROUND_UP(MAX77826_BUCK_VOLT_STEP *
|
|
(new_selector - old_selector),
|
|
MAX77826_BUCK_RAMP_DELAY);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int max77826_read_device_id(struct regmap *regmap, struct device *dev)
|
|
{
|
|
unsigned int device_id;
|
|
int res;
|
|
|
|
res = regmap_read(regmap, MAX77826_REG_DEVICE_ID, &device_id);
|
|
if (!res)
|
|
dev_dbg(dev, "DEVICE_ID: 0x%x\n", device_id);
|
|
|
|
return res;
|
|
}
|
|
|
|
static int max77826_i2c_probe(struct i2c_client *client)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct max77826_regulator_info *info;
|
|
struct regulator_config config = {};
|
|
struct regulator_dev *rdev;
|
|
struct regmap *regmap;
|
|
int i;
|
|
|
|
info = devm_kzalloc(dev, sizeof(struct max77826_regulator_info),
|
|
GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->rdesc = max77826_regulators_desc;
|
|
regmap = devm_regmap_init_i2c(client, &max77826_regmap_config);
|
|
if (IS_ERR(regmap)) {
|
|
dev_err(dev, "Failed to allocate regmap!\n");
|
|
return PTR_ERR(regmap);
|
|
}
|
|
|
|
info->regmap = regmap;
|
|
i2c_set_clientdata(client, info);
|
|
|
|
config.dev = dev;
|
|
config.regmap = regmap;
|
|
config.driver_data = info;
|
|
|
|
for (i = 0; i < MAX77826_MAX_REGULATORS; i++) {
|
|
rdev = devm_regulator_register(dev,
|
|
&max77826_regulators_desc[i],
|
|
&config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(dev, "Failed to register regulator!\n");
|
|
return PTR_ERR(rdev);
|
|
}
|
|
}
|
|
|
|
return max77826_read_device_id(regmap, dev);
|
|
}
|
|
|
|
static const struct of_device_id __maybe_unused max77826_of_match[] = {
|
|
{ .compatible = "maxim,max77826" },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, max77826_of_match);
|
|
|
|
static const struct i2c_device_id max77826_id[] = {
|
|
{ "max77826-regulator" },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, max77826_id);
|
|
|
|
static struct i2c_driver max77826_regulator_driver = {
|
|
.driver = {
|
|
.name = "max77826",
|
|
.of_match_table = of_match_ptr(max77826_of_match),
|
|
},
|
|
.probe_new = max77826_i2c_probe,
|
|
.id_table = max77826_id,
|
|
};
|
|
module_i2c_driver(max77826_regulator_driver);
|
|
|
|
MODULE_AUTHOR("Iskren Chernev <iskren.chernev@gmail.com>");
|
|
MODULE_DESCRIPTION("MAX77826 PMIC regulator driver");
|
|
MODULE_LICENSE("GPL");
|