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// SPDX-License-Identifier: GPL-2.0
//
// Device driver for regulators in Hi6421V530 IC
//
// Copyright (c) <2017> HiSilicon Technologies Co., Ltd.
// http://www.hisilicon.com
// Copyright (c) <2017> Linaro Ltd.
// https://www.linaro.org
//
// Author: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
// Guodong Xu <guodong.xu@linaro.org>
#include <linux/mfd/hi6421-pmic.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
/*
* struct hi6421v530_regulator_info - hi6421v530 regulator information
* @desc: regulator description
* @mode_mask: ECO mode bitmask of LDOs; for BUCKs, this masks sleep
* @eco_microamp: eco mode load upper limit (in uA), valid for LDOs only
*/
struct hi6421v530_regulator_info {
struct regulator_desc rdesc;
u8 mode_mask;
u32 eco_microamp;
};
/* HI6421v530 regulators */
enum hi6421v530_regulator_id {
HI6421V530_LDO3,
HI6421V530_LDO9,
HI6421V530_LDO11,
HI6421V530_LDO15,
HI6421V530_LDO16,
};
static const unsigned int ldo_3_voltages[] = {
1800000, 1825000, 1850000, 1875000,
1900000, 1925000, 1950000, 1975000,
2000000, 2025000, 2050000, 2075000,
2100000, 2125000, 2150000, 2200000,
};
static const unsigned int ldo_9_11_voltages[] = {
1750000, 1800000, 1825000, 2800000,
2850000, 2950000, 3000000, 3300000,
};
static const unsigned int ldo_15_16_voltages[] = {
1750000, 1800000, 2400000, 2600000,
2700000, 2850000, 2950000, 3000000,
};
static const struct regulator_ops hi6421v530_ldo_ops;
#define HI6421V530_LDO_ENABLE_TIME (350)
/*
* _id - LDO id name string
* v_table - voltage table
* vreg - voltage select register
* vmask - voltage select mask
* ereg - enable register
* emask - enable mask
* odelay - off/on delay time in uS
* ecomask - eco mode mask
* ecoamp - eco mode load uppler limit in uA
*/
#define HI6421V530_LDO(_ID, v_table, vreg, vmask, ereg, emask, \
odelay, ecomask, ecoamp) { \
.rdesc = { \
.name = #_ID, \
.of_match = of_match_ptr(#_ID), \
.regulators_node = of_match_ptr("regulators"), \
.ops = &hi6421v530_ldo_ops, \
.type = REGULATOR_VOLTAGE, \
.id = HI6421V530_##_ID, \
.owner = THIS_MODULE, \
.n_voltages = ARRAY_SIZE(v_table), \
.volt_table = v_table, \
.vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \
.vsel_mask = vmask, \
.enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \
.enable_mask = emask, \
.enable_time = HI6421V530_LDO_ENABLE_TIME, \
.off_on_delay = odelay, \
}, \
.mode_mask = ecomask, \
.eco_microamp = ecoamp, \
}
/* HI6421V530 regulator information */
static struct hi6421v530_regulator_info hi6421v530_regulator_info[] = {
HI6421V530_LDO(LDO3, ldo_3_voltages, 0x061, 0xf, 0x060, 0x2,
20000, 0x6, 8000),
HI6421V530_LDO(LDO9, ldo_9_11_voltages, 0x06b, 0x7, 0x06a, 0x2,
40000, 0x6, 8000),
HI6421V530_LDO(LDO11, ldo_9_11_voltages, 0x06f, 0x7, 0x06e, 0x2,
40000, 0x6, 8000),
HI6421V530_LDO(LDO15, ldo_15_16_voltages, 0x077, 0x7, 0x076, 0x2,
40000, 0x6, 8000),
HI6421V530_LDO(LDO16, ldo_15_16_voltages, 0x079, 0x7, 0x078, 0x2,
40000, 0x6, 8000),
};
static unsigned int hi6421v530_regulator_ldo_get_mode(
struct regulator_dev *rdev)
{
struct hi6421v530_regulator_info *info;
unsigned int reg_val;
info = rdev_get_drvdata(rdev);
regmap_read(rdev->regmap, rdev->desc->enable_reg, ®_val);
if (reg_val & (info->mode_mask))
return REGULATOR_MODE_IDLE;
return REGULATOR_MODE_NORMAL;
}
static int hi6421v530_regulator_ldo_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct hi6421v530_regulator_info *info;
unsigned int new_mode;
info = rdev_get_drvdata(rdev);
switch (mode) {
case REGULATOR_MODE_NORMAL:
new_mode = 0;
break;
case REGULATOR_MODE_IDLE:
new_mode = info->mode_mask;
break;
default:
return -EINVAL;
}
regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
info->mode_mask, new_mode);
return 0;
}
static const struct regulator_ops hi6421v530_ldo_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_ascend,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_mode = hi6421v530_regulator_ldo_get_mode,
.set_mode = hi6421v530_regulator_ldo_set_mode,
};
static int hi6421v530_regulator_probe(struct platform_device *pdev)
{
struct hi6421_pmic *pmic;
struct regulator_dev *rdev;
struct regulator_config config = { };
unsigned int i;
pmic = dev_get_drvdata(pdev->dev.parent);
if (!pmic) {
dev_err(&pdev->dev, "no pmic in the regulator parent node\n");
return -ENODEV;
}
for (i = 0; i < ARRAY_SIZE(hi6421v530_regulator_info); i++) {
config.dev = pdev->dev.parent;
config.regmap = pmic->regmap;
config.driver_data = &hi6421v530_regulator_info[i];
rdev = devm_regulator_register(&pdev->dev,
&hi6421v530_regulator_info[i].rdesc,
&config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "failed to register regulator %s\n",
hi6421v530_regulator_info[i].rdesc.name);
return PTR_ERR(rdev);
}
}
return 0;
}
static const struct platform_device_id hi6421v530_regulator_table[] = {
{ .name = "hi6421v530-regulator" },
{},
};
MODULE_DEVICE_TABLE(platform, hi6421v530_regulator_table);
static struct platform_driver hi6421v530_regulator_driver = {
.id_table = hi6421v530_regulator_table,
.driver = {
.name = "hi6421v530-regulator",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
.probe = hi6421v530_regulator_probe,
};
module_platform_driver(hi6421v530_regulator_driver);
MODULE_AUTHOR("Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>");
MODULE_DESCRIPTION("Hi6421v530 regulator driver");
MODULE_LICENSE("GPL v2");
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