mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 12:28:41 +08:00
5b379b2bf8
Use the new .probe_new instead. Signed-off-by: Axel Lin <axel.lin@ingics.com> Link: https://lore.kernel.org/r/20200114124449.28408-2-axel.lin@ingics.com Signed-off-by: Mark Brown <broonie@kernel.org>
331 lines
9.5 KiB
C
331 lines
9.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
//
|
|
// mpq7920.c - regulator driver for mps mpq7920
|
|
//
|
|
// Copyright 2019 Monolithic Power Systems, Inc
|
|
//
|
|
// Author: Saravanan Sekar <sravanhome@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>
|
|
#include "mpq7920.h"
|
|
|
|
#define MPQ7920_BUCK_VOLT_RANGE \
|
|
((MPQ7920_VOLT_MAX - MPQ7920_BUCK_VOLT_MIN)/MPQ7920_VOLT_STEP + 1)
|
|
#define MPQ7920_LDO_VOLT_RANGE \
|
|
((MPQ7920_VOLT_MAX - MPQ7920_LDO_VOLT_MIN)/MPQ7920_VOLT_STEP + 1)
|
|
|
|
#define MPQ7920BUCK(_name, _id, _ilim) \
|
|
[MPQ7920_BUCK ## _id] = { \
|
|
.id = MPQ7920_BUCK ## _id, \
|
|
.name = _name, \
|
|
.of_match = _name, \
|
|
.regulators_node = "regulators", \
|
|
.of_parse_cb = mpq7920_parse_cb, \
|
|
.ops = &mpq7920_buck_ops, \
|
|
.min_uV = MPQ7920_BUCK_VOLT_MIN, \
|
|
.uV_step = MPQ7920_VOLT_STEP, \
|
|
.n_voltages = MPQ7920_BUCK_VOLT_RANGE, \
|
|
.curr_table = _ilim, \
|
|
.n_current_limits = ARRAY_SIZE(_ilim), \
|
|
.csel_reg = MPQ7920_BUCK ##_id## _REG_C, \
|
|
.csel_mask = MPQ7920_MASK_BUCK_ILIM, \
|
|
.enable_reg = MPQ7920_REG_REGULATOR_EN, \
|
|
.enable_mask = BIT(MPQ7920_REGULATOR_EN_OFFSET - \
|
|
MPQ7920_BUCK ## _id), \
|
|
.vsel_reg = MPQ7920_BUCK ##_id## _REG_A, \
|
|
.vsel_mask = MPQ7920_MASK_VREF, \
|
|
.active_discharge_on = MPQ7920_DISCHARGE_ON, \
|
|
.active_discharge_reg = MPQ7920_BUCK ##_id## _REG_B, \
|
|
.active_discharge_mask = MPQ7920_MASK_DISCHARGE, \
|
|
.soft_start_reg = MPQ7920_BUCK ##_id## _REG_C, \
|
|
.soft_start_mask = MPQ7920_MASK_SOFTSTART, \
|
|
.owner = THIS_MODULE, \
|
|
}
|
|
|
|
#define MPQ7920LDO(_name, _id, _ops, _ilim, _ilim_sz, _creg, _cmask) \
|
|
[MPQ7920_LDO ## _id] = { \
|
|
.id = MPQ7920_LDO ## _id, \
|
|
.name = _name, \
|
|
.of_match = _name, \
|
|
.regulators_node = "regulators", \
|
|
.ops = _ops, \
|
|
.min_uV = MPQ7920_LDO_VOLT_MIN, \
|
|
.uV_step = MPQ7920_VOLT_STEP, \
|
|
.n_voltages = MPQ7920_LDO_VOLT_RANGE, \
|
|
.vsel_reg = MPQ7920_LDO ##_id## _REG_A, \
|
|
.vsel_mask = MPQ7920_MASK_VREF, \
|
|
.curr_table = _ilim, \
|
|
.n_current_limits = _ilim_sz, \
|
|
.csel_reg = _creg, \
|
|
.csel_mask = _cmask, \
|
|
.enable_reg = (_id == 1) ? 0 : MPQ7920_REG_REGULATOR_EN,\
|
|
.enable_mask = BIT(MPQ7920_REGULATOR_EN_OFFSET - \
|
|
MPQ7920_LDO ##_id + 1), \
|
|
.active_discharge_on = MPQ7920_DISCHARGE_ON, \
|
|
.active_discharge_mask = MPQ7920_MASK_DISCHARGE, \
|
|
.active_discharge_reg = MPQ7920_LDO ##_id## _REG_B, \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.owner = THIS_MODULE, \
|
|
}
|
|
|
|
enum mpq7920_regulators {
|
|
MPQ7920_BUCK1,
|
|
MPQ7920_BUCK2,
|
|
MPQ7920_BUCK3,
|
|
MPQ7920_BUCK4,
|
|
MPQ7920_LDO1, /* LDORTC */
|
|
MPQ7920_LDO2,
|
|
MPQ7920_LDO3,
|
|
MPQ7920_LDO4,
|
|
MPQ7920_LDO5,
|
|
MPQ7920_MAX_REGULATORS,
|
|
};
|
|
|
|
struct mpq7920_regulator_info {
|
|
struct regmap *regmap;
|
|
struct regulator_desc *rdesc;
|
|
};
|
|
|
|
static const struct regmap_config mpq7920_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.max_register = 0x25,
|
|
};
|
|
|
|
/* Current limits array (in uA)
|
|
* ILIM1 & ILIM3
|
|
*/
|
|
static const unsigned int mpq7920_I_limits1[] = {
|
|
4600000, 6600000, 7600000, 9300000
|
|
};
|
|
|
|
/* ILIM2 & ILIM4 */
|
|
static const unsigned int mpq7920_I_limits2[] = {
|
|
2700000, 3900000, 5100000, 6100000
|
|
};
|
|
|
|
/* LDO4 & LDO5 */
|
|
static const unsigned int mpq7920_I_limits3[] = {
|
|
300000, 700000
|
|
};
|
|
|
|
static int mpq7920_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay);
|
|
static int mpq7920_parse_cb(struct device_node *np,
|
|
const struct regulator_desc *rdesc,
|
|
struct regulator_config *config);
|
|
|
|
/* RTCLDO not controllable, always ON */
|
|
static const struct regulator_ops mpq7920_ldortc_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,
|
|
};
|
|
|
|
static const struct regulator_ops mpq7920_ldo_wo_current_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_active_discharge = regulator_set_active_discharge_regmap,
|
|
};
|
|
|
|
static const struct regulator_ops mpq7920_ldo_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_active_discharge = regulator_set_active_discharge_regmap,
|
|
.get_current_limit = regulator_get_current_limit_regmap,
|
|
.set_current_limit = regulator_set_current_limit_regmap,
|
|
};
|
|
|
|
static const struct regulator_ops mpq7920_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_active_discharge = regulator_set_active_discharge_regmap,
|
|
.set_soft_start = regulator_set_soft_start_regmap,
|
|
.set_ramp_delay = mpq7920_set_ramp_delay,
|
|
};
|
|
|
|
static struct regulator_desc mpq7920_regulators_desc[MPQ7920_MAX_REGULATORS] = {
|
|
MPQ7920BUCK("buck1", 1, mpq7920_I_limits1),
|
|
MPQ7920BUCK("buck2", 2, mpq7920_I_limits2),
|
|
MPQ7920BUCK("buck3", 3, mpq7920_I_limits1),
|
|
MPQ7920BUCK("buck4", 4, mpq7920_I_limits2),
|
|
MPQ7920LDO("ldortc", 1, &mpq7920_ldortc_ops, NULL, 0, 0, 0),
|
|
MPQ7920LDO("ldo2", 2, &mpq7920_ldo_wo_current_ops, NULL, 0, 0, 0),
|
|
MPQ7920LDO("ldo3", 3, &mpq7920_ldo_wo_current_ops, NULL, 0, 0, 0),
|
|
MPQ7920LDO("ldo4", 4, &mpq7920_ldo_ops, mpq7920_I_limits3,
|
|
ARRAY_SIZE(mpq7920_I_limits3), MPQ7920_LDO4_REG_B,
|
|
MPQ7920_MASK_LDO_ILIM),
|
|
MPQ7920LDO("ldo5", 5, &mpq7920_ldo_ops, mpq7920_I_limits3,
|
|
ARRAY_SIZE(mpq7920_I_limits3), MPQ7920_LDO5_REG_B,
|
|
MPQ7920_MASK_LDO_ILIM),
|
|
};
|
|
|
|
/*
|
|
* DVS ramp rate BUCK1 to BUCK4
|
|
* 00-01: Reserved
|
|
* 10: 8mV/us
|
|
* 11: 4mV/us
|
|
*/
|
|
static int mpq7920_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
|
|
{
|
|
unsigned int ramp_val;
|
|
|
|
if (ramp_delay > 8000 || ramp_delay < 0)
|
|
return -EINVAL;
|
|
|
|
if (ramp_delay <= 4000)
|
|
ramp_val = 3;
|
|
else
|
|
ramp_val = 2;
|
|
|
|
return regmap_update_bits(rdev->regmap, MPQ7920_REG_CTL0,
|
|
MPQ7920_MASK_DVS_SLEWRATE, ramp_val << 6);
|
|
}
|
|
|
|
static int mpq7920_parse_cb(struct device_node *np,
|
|
const struct regulator_desc *desc,
|
|
struct regulator_config *config)
|
|
{
|
|
uint8_t val;
|
|
int ret;
|
|
struct mpq7920_regulator_info *info = config->driver_data;
|
|
struct regulator_desc *rdesc = &info->rdesc[desc->id];
|
|
|
|
if (of_property_read_bool(np, "mps,buck-ovp-disable")) {
|
|
regmap_update_bits(config->regmap,
|
|
MPQ7920_BUCK1_REG_B + (rdesc->id * 4),
|
|
MPQ7920_MASK_OVP, MPQ7920_OVP_DISABLE);
|
|
}
|
|
|
|
ret = of_property_read_u8(np, "mps,buck-phase-delay", &val);
|
|
if (!ret) {
|
|
regmap_update_bits(config->regmap,
|
|
MPQ7920_BUCK1_REG_C + (rdesc->id * 4),
|
|
MPQ7920_MASK_BUCK_PHASE_DEALY,
|
|
(val & 3) << 4);
|
|
}
|
|
|
|
ret = of_property_read_u8(np, "mps,buck-softstart", &val);
|
|
if (!ret)
|
|
rdesc->soft_start_val_on = (val & 3) << 2;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mpq7920_parse_dt(struct device *dev,
|
|
struct mpq7920_regulator_info *info)
|
|
{
|
|
int ret;
|
|
struct device_node *np = dev->of_node;
|
|
uint8_t freq;
|
|
|
|
np = of_get_child_by_name(np, "regulators");
|
|
if (!np) {
|
|
dev_err(dev, "missing 'regulators' subnode in DT\n");
|
|
return;
|
|
}
|
|
|
|
ret = of_property_read_u8(np, "mps,switch-freq", &freq);
|
|
if (!ret) {
|
|
regmap_update_bits(info->regmap, MPQ7920_REG_CTL0,
|
|
MPQ7920_MASK_SWITCH_FREQ,
|
|
(freq & 3) << 4);
|
|
}
|
|
|
|
of_node_put(np);
|
|
}
|
|
|
|
static int mpq7920_i2c_probe(struct i2c_client *client)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct mpq7920_regulator_info *info;
|
|
struct regulator_config config = { NULL, };
|
|
struct regulator_dev *rdev;
|
|
struct regmap *regmap;
|
|
int i;
|
|
|
|
info = devm_kzalloc(dev, sizeof(struct mpq7920_regulator_info),
|
|
GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->rdesc = mpq7920_regulators_desc;
|
|
regmap = devm_regmap_init_i2c(client, &mpq7920_regmap_config);
|
|
if (IS_ERR(regmap)) {
|
|
dev_err(dev, "Failed to allocate regmap!\n");
|
|
return PTR_ERR(regmap);
|
|
}
|
|
|
|
i2c_set_clientdata(client, info);
|
|
info->regmap = regmap;
|
|
if (client->dev.of_node)
|
|
mpq7920_parse_dt(&client->dev, info);
|
|
|
|
config.dev = dev;
|
|
config.regmap = regmap;
|
|
config.driver_data = info;
|
|
|
|
for (i = 0; i < MPQ7920_MAX_REGULATORS; i++) {
|
|
rdev = devm_regulator_register(dev,
|
|
&mpq7920_regulators_desc[i],
|
|
&config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(dev, "Failed to register regulator!\n");
|
|
return PTR_ERR(rdev);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id mpq7920_of_match[] = {
|
|
{ .compatible = "mps,mpq7920"},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, mpq7920_of_match);
|
|
|
|
static const struct i2c_device_id mpq7920_id[] = {
|
|
{ "mpq7920", },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, mpq7920_id);
|
|
|
|
static struct i2c_driver mpq7920_regulator_driver = {
|
|
.driver = {
|
|
.name = "mpq7920",
|
|
.of_match_table = of_match_ptr(mpq7920_of_match),
|
|
},
|
|
.probe_new = mpq7920_i2c_probe,
|
|
.id_table = mpq7920_id,
|
|
};
|
|
module_i2c_driver(mpq7920_regulator_driver);
|
|
|
|
MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>");
|
|
MODULE_DESCRIPTION("MPQ7920 PMIC regulator driver");
|
|
MODULE_LICENSE("GPL");
|