/*
* Device driver for regulators in Hi655x IC
*
* Copyright (c) 2016 Hisilicon.
*
* Authors:
* Chen Feng <puck.chen@hisilicon.com>
* Fei Wang <w.f@huawei.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/hi655x-pmic.h>
struct hi655x_regulator {
unsigned int disable_reg;
unsigned int status_reg;
unsigned int ctrl_regs;
unsigned int ctrl_mask;
struct regulator_desc rdesc;
};
/* LDO7 & LDO10 */
static const unsigned int ldo7_voltages[] = {
1800000, 1850000, 2850000, 2900000,
3000000, 3100000, 3200000, 3300000,
};
static const unsigned int ldo19_voltages[] = {
1800000, 1850000, 1900000, 1750000,
2800000, 2850000, 2900000, 3000000,
};
static const unsigned int ldo22_voltages[] = {
900000, 1000000, 1050000, 1100000,
1150000, 1175000, 1185000, 1200000,
};
enum hi655x_regulator_id {
HI655X_LDO0,
HI655X_LDO1,
HI655X_LDO2,
HI655X_LDO3,
HI655X_LDO4,
HI655X_LDO5,
HI655X_LDO6,
HI655X_LDO7,
HI655X_LDO8,
HI655X_LDO9,
HI655X_LDO10,
HI655X_LDO11,
HI655X_LDO12,
HI655X_LDO13,
HI655X_LDO14,
HI655X_LDO15,
HI655X_LDO16,
HI655X_LDO17,
HI655X_LDO18,
HI655X_LDO19,
HI655X_LDO20,
HI655X_LDO21,
HI655X_LDO22,
};
static int hi655x_is_enabled(struct regulator_dev *rdev)
{
unsigned int value = 0;
struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
regmap_read(rdev->regmap, regulator->status_reg, &value);
return (value & BIT(regulator->ctrl_mask));
}
static int hi655x_disable(struct regulator_dev *rdev)
{
int ret = 0;
struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
ret = regmap_write(rdev->regmap, regulator->disable_reg,
BIT(regulator->ctrl_mask));
return ret;
}
static struct regulator_ops hi655x_regulator_ops = {
.enable = regulator_enable_regmap,
.disable = hi655x_disable,
.is_enabled = hi655x_is_enabled,
.list_voltage = regulator_list_voltage_table,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
};
static struct regulator_ops hi655x_ldo_linear_ops = {
.enable = regulator_enable_regmap,
.disable = hi655x_disable,
.is_enabled = hi655x_is_enabled,
.list_voltage = regulator_list_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
};
#define HI655X_LDO(_ID, vreg, vmask, ereg, dreg, \
sreg, cmask, vtable) { \
.rdesc = { \
.name = #_ID, \
.of_match = of_match_ptr(#_ID), \
.ops = &hi655x_regulator_ops, \
.regulators_node = of_match_ptr("regulators"), \
.type = REGULATOR_VOLTAGE, \
.id = HI655X_##_ID, \
.owner = THIS_MODULE, \
.n_voltages = ARRAY_SIZE(vtable), \
.volt_table = vtable, \
.vsel_reg = HI655X_BUS_ADDR(vreg), \
.vsel_mask = vmask, \
.enable_reg = HI655X_BUS_ADDR(ereg), \
.enable_mask = BIT(cmask), \
}, \
.disable_reg = HI655X_BUS_ADDR(dreg), \
.status_reg = HI655X_BUS_ADDR(sreg), \
.ctrl_mask = cmask, \
}
#define HI655X_LDO_LINEAR(_ID, vreg, vmask, ereg, dreg, \
sreg, cmask, minv, nvolt, vstep) { \
.rdesc = { \
.name = #_ID, \
.of_match = of_match_ptr(#_ID), \
.ops = &hi655x_ldo_linear_ops, \
.regulators_node = of_match_ptr("regulators"), \
.type = REGULATOR_VOLTAGE, \
.id = HI655X_##_ID, \
.owner = THIS_MODULE, \
.min_uV = minv, \
.n_voltages = nvolt, \
.uV_step = vstep, \
.vsel_reg = HI655X_BUS_ADDR(vreg), \
.vsel_mask = vmask, \
.enable_reg = HI655X_BUS_ADDR(ereg), \
.enable_mask = BIT(cmask), \
}, \
.disable_reg = HI655X_BUS_ADDR(dreg), \
.status_reg = HI655X_BUS_ADDR(sreg), \
.ctrl_mask = cmask, \
}
static struct hi655x_regulator regulators[] = {
HI655X_LDO_LINEAR(LDO2, 0x72, 0x07, 0x29, 0x2a, 0x2b, 0x01,
2500000, 8, 100000),
HI655X_LDO(LDO7, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x06, ldo7_voltages),
HI655X_LDO(LDO10, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x01, ldo7_voltages),
HI655X_LDO_LINEAR(LDO13, 0x7e, 0x07, 0x2c, 0x2d, 0x2e, 0x04,
1600000, 8, 50000),
HI655X_LDO_LINEAR(LDO14, 0x7f, 0x07, 0x2c, 0x2d, 0x2e, 0x05,
2500000, 8, 100000),
HI655X_LDO_LINEAR(LDO15, 0x80, 0x07, 0x2c, 0x2d, 0x2e, 0x06,
1600000, 8, 50000),
HI655X_LDO_LINEAR(LDO17, 0x82, 0x07, 0x2f, 0x30, 0x31, 0x00,
2500000, 8, 100000),
HI655X_LDO(LDO19, 0x84, 0x07, 0x2f, 0x30, 0x31, 0x02, ldo19_voltages),
HI655X_LDO_LINEAR(LDO21, 0x86, 0x07, 0x2f, 0x30, 0x31, 0x04,
1650000, 8, 50000),
HI655X_LDO(LDO22, 0x87, 0x07, 0x2f, 0x30, 0x31, 0x05, ldo22_voltages),
};
static int hi655x_regulator_probe(struct platform_device *pdev)
{
unsigned int i;
struct hi655x_regulator *regulator;
struct hi655x_pmic *pmic;
struct regulator_config config = { };
struct regulator_dev *rdev;
pmic = dev_get_drvdata(pdev->dev.parent);
if (!pmic) {
dev_err(&pdev->dev, "no pmic in the regulator parent node\n");
return -ENODEV;
}
regulator = devm_kzalloc(&pdev->dev, sizeof(*regulator), GFP_KERNEL);
if (!regulator)
return -ENOMEM;
platform_set_drvdata(pdev, regulator);
config.dev = pdev->dev.parent;
config.regmap = pmic->regmap;
config.driver_data = regulator;
for (i = 0; i < ARRAY_SIZE(regulators); i++) {
rdev = devm_regulator_register(&pdev->dev,
®ulators[i].rdesc,
&config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "failed to register regulator %s\n",
regulator->rdesc.name);
return PTR_ERR(rdev);
}
}
return 0;
}
static struct platform_driver hi655x_regulator_driver = {
.driver = {
.name = "hi655x-regulator",
},
.probe = hi655x_regulator_probe,
};
module_platform_driver(hi655x_regulator_driver);
MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>");
MODULE_DESCRIPTION("Hisilicon Hi655x regulator driver");
MODULE_LICENSE("GPL v2");