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WSL2-Linux-Kernel/drivers/regulator/hi6421v600-regulator.c

300 строки
7.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0
//
// Device driver for regulators in Hisi IC
//
// Copyright (c) 2013 Linaro Ltd.
// Copyright (c) 2011 Hisilicon.
// Copyright (c) 2020-2021 Huawei Technologies Co., Ltd
//
// Guodong Xu <guodong.xu@linaro.org>
#include <linux/delay.h>
#include <linux/mfd/hi6421-spmi-pmic.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/spmi.h>
struct hi6421_spmi_reg_info {
struct regulator_desc desc;
struct hi6421_spmi_pmic *pmic;
u8 eco_mode_mask;
u32 eco_uA;
/* Serialize regulator enable logic */
struct mutex enable_mutex;
};
static const unsigned int ldo3_voltages[] = {
1500000, 1550000, 1600000, 1650000,
1700000, 1725000, 1750000, 1775000,
1800000, 1825000, 1850000, 1875000,
1900000, 1925000, 1950000, 2000000
};
static const unsigned int ldo4_voltages[] = {
1725000, 1750000, 1775000, 1800000,
1825000, 1850000, 1875000, 1900000
};
static const unsigned int ldo9_voltages[] = {
1750000, 1800000, 1825000, 2800000,
2850000, 2950000, 3000000, 3300000
};
static const unsigned int ldo15_voltages[] = {
1800000, 1850000, 2400000, 2600000,
2700000, 2850000, 2950000, 3000000
};
static const unsigned int ldo17_voltages[] = {
2500000, 2600000, 2700000, 2800000,
3000000, 3100000, 3200000, 3300000
};
static const unsigned int ldo34_voltages[] = {
2600000, 2700000, 2800000, 2900000,
3000000, 3100000, 3200000, 3300000
};
/**
* HI6421V600_LDO() - specify a LDO power line
* @_id: LDO id name string
* @vtable: voltage table
* @ereg: enable register
* @emask: enable mask
* @vreg: voltage select register
* @odelay: off/on delay time in uS
* @etime: enable time in uS
* @ecomask: eco mode mask
* @ecoamp: eco mode load uppler limit in uA
*/
#define HI6421V600_LDO(_id, vtable, ereg, emask, vreg, \
odelay, etime, ecomask, ecoamp) \
[HI6421V600_##_id] = { \
.desc = { \
.name = #_id, \
.of_match = of_match_ptr(#_id), \
.regulators_node = of_match_ptr("regulators"), \
.ops = &hi6421_spmi_ldo_rops, \
.type = REGULATOR_VOLTAGE, \
.id = HI6421V600_##_id, \
.owner = THIS_MODULE, \
.volt_table = vtable, \
.n_voltages = ARRAY_SIZE(vtable), \
.vsel_mask = (1 << (ARRAY_SIZE(vtable) - 1)) - 1, \
.vsel_reg = vreg, \
.enable_reg = ereg, \
.enable_mask = emask, \
.enable_time = etime, \
.ramp_delay = etime, \
.off_on_delay = odelay, \
}, \
.eco_mode_mask = ecomask, \
.eco_uA = ecoamp, \
}
static int hi6421_spmi_regulator_enable(struct regulator_dev *rdev)
{
struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
struct hi6421_spmi_pmic *pmic = sreg->pmic;
int ret;
/* cannot enable more than one regulator at one time */
mutex_lock(&sreg->enable_mutex);
ret = regmap_update_bits(pmic->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask,
rdev->desc->enable_mask);
/* Avoid powering up multiple devices at the same time */
usleep_range(rdev->desc->off_on_delay, rdev->desc->off_on_delay + 60);
mutex_unlock(&sreg->enable_mutex);
return ret;
}
static int hi6421_spmi_regulator_disable(struct regulator_dev *rdev)
{
struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
struct hi6421_spmi_pmic *pmic = sreg->pmic;
return regmap_update_bits(pmic->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask, 0);
}
static unsigned int hi6421_spmi_regulator_get_mode(struct regulator_dev *rdev)
{
struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
struct hi6421_spmi_pmic *pmic = sreg->pmic;
u32 reg_val;
regmap_read(pmic->regmap, rdev->desc->enable_reg, &reg_val);
if (reg_val & sreg->eco_mode_mask)
return REGULATOR_MODE_IDLE;
return REGULATOR_MODE_NORMAL;
}
static int hi6421_spmi_regulator_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
struct hi6421_spmi_pmic *pmic = sreg->pmic;
u32 val;
switch (mode) {
case REGULATOR_MODE_NORMAL:
val = 0;
break;
case REGULATOR_MODE_IDLE:
val = sreg->eco_mode_mask << (ffs(sreg->eco_mode_mask) - 1);
break;
default:
return -EINVAL;
}
return regmap_update_bits(pmic->regmap, rdev->desc->enable_reg,
sreg->eco_mode_mask, val);
}
static unsigned int
hi6421_spmi_regulator_get_optimum_mode(struct regulator_dev *rdev,
int input_uV, int output_uV,
int load_uA)
{
struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
if (!sreg->eco_uA || ((unsigned int)load_uA > sreg->eco_uA))
return REGULATOR_MODE_NORMAL;
return REGULATOR_MODE_IDLE;
}
static const struct regulator_ops hi6421_spmi_ldo_rops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = hi6421_spmi_regulator_enable,
.disable = hi6421_spmi_regulator_disable,
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_iterate,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_mode = hi6421_spmi_regulator_get_mode,
.set_mode = hi6421_spmi_regulator_set_mode,
.get_optimum_mode = hi6421_spmi_regulator_get_optimum_mode,
};
/* HI6421v600 regulators with known registers */
enum hi6421_spmi_regulator_id {
HI6421V600_LDO3,
HI6421V600_LDO4,
HI6421V600_LDO9,
HI6421V600_LDO15,
HI6421V600_LDO16,
HI6421V600_LDO17,
HI6421V600_LDO33,
HI6421V600_LDO34,
};
static struct hi6421_spmi_reg_info regulator_info[] = {
HI6421V600_LDO(LDO3, ldo3_voltages,
0x16, 0x01, 0x51,
20000, 120,
0, 0),
HI6421V600_LDO(LDO4, ldo4_voltages,
0x17, 0x01, 0x52,
20000, 120,
0x10, 10000),
HI6421V600_LDO(LDO9, ldo9_voltages,
0x1c, 0x01, 0x57,
20000, 360,
0x10, 10000),
HI6421V600_LDO(LDO15, ldo15_voltages,
0x21, 0x01, 0x5c,
20000, 360,
0x10, 10000),
HI6421V600_LDO(LDO16, ldo15_voltages,
0x22, 0x01, 0x5d,
20000, 360,
0x10, 10000),
HI6421V600_LDO(LDO17, ldo17_voltages,
0x23, 0x01, 0x5e,
20000, 120,
0x10, 10000),
HI6421V600_LDO(LDO33, ldo17_voltages,
0x32, 0x01, 0x6d,
20000, 120,
0, 0),
HI6421V600_LDO(LDO34, ldo34_voltages,
0x33, 0x01, 0x6e,
20000, 120,
0, 0),
};
static int hi6421_spmi_regulator_probe(struct platform_device *pdev)
{
struct device *pmic_dev = pdev->dev.parent;
struct regulator_config config = { };
struct hi6421_spmi_reg_info *sreg;
struct hi6421_spmi_reg_info *info;
struct device *dev = &pdev->dev;
struct hi6421_spmi_pmic *pmic;
struct regulator_dev *rdev;
int i;
/*
* This driver is meant to be called by hi6421-spmi-core,
* which should first set drvdata. If this doesn't happen, hit
* a warn on and return.
*/
pmic = dev_get_drvdata(pmic_dev);
if (WARN_ON(!pmic))
return -ENODEV;
sreg = devm_kzalloc(dev, sizeof(*sreg), GFP_KERNEL);
if (!sreg)
return -ENOMEM;
sreg->pmic = pmic;
mutex_init(&sreg->enable_mutex);
for (i = 0; i < ARRAY_SIZE(regulator_info); i++) {
info = &regulator_info[i];
config.dev = pdev->dev.parent;
config.driver_data = sreg;
config.regmap = pmic->regmap;
rdev = devm_regulator_register(dev, &info->desc, &config);
if (IS_ERR(rdev)) {
dev_err(dev, "failed to register %s\n",
info->desc.name);
return PTR_ERR(rdev);
}
}
return 0;
}
static const struct platform_device_id hi6421_spmi_regulator_table[] = {
{ .name = "hi6421v600-regulator" },
{},
};
MODULE_DEVICE_TABLE(platform, hi6421_spmi_regulator_table);
static struct platform_driver hi6421_spmi_regulator_driver = {
.id_table = hi6421_spmi_regulator_table,
.driver = {
.name = "hi6421v600-regulator",
},
.probe = hi6421_spmi_regulator_probe,
};
module_platform_driver(hi6421_spmi_regulator_driver);
MODULE_DESCRIPTION("Hi6421v600 SPMI regulator driver");
MODULE_LICENSE("GPL v2");
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