// SPDX-License-Identifier: GPL-2.0-only
//
// Copyright (C) 2020 MediaTek Inc.
//
// Author: Gene Chen <gene_chen@richtek.com>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.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 <dt-bindings/regulator/mediatek,mt6360-regulator.h>
enum {
MT6360_REGULATOR_BUCK1 = 0,
MT6360_REGULATOR_BUCK2,
MT6360_REGULATOR_LDO6,
MT6360_REGULATOR_LDO7,
MT6360_REGULATOR_LDO1,
MT6360_REGULATOR_LDO2,
MT6360_REGULATOR_LDO3,
MT6360_REGULATOR_LDO5,
MT6360_REGULATOR_MAX,
};
struct mt6360_irq_mapping {
const char *name;
irq_handler_t handler;
};
struct mt6360_regulator_desc {
const struct regulator_desc desc;
unsigned int mode_reg;
unsigned int mode_mask;
unsigned int state_reg;
unsigned int state_mask;
const struct mt6360_irq_mapping *irq_tables;
int irq_table_size;
};
struct mt6360_regulator_data {
struct device *dev;
struct regmap *regmap;
};
static irqreturn_t mt6360_pgb_event_handler(int irq, void *data)
{
struct regulator_dev *rdev = data;
regulator_notifier_call_chain(rdev, REGULATOR_EVENT_FAIL, NULL);
return IRQ_HANDLED;
}
static irqreturn_t mt6360_oc_event_handler(int irq, void *data)
{
struct regulator_dev *rdev = data;
regulator_notifier_call_chain(rdev, REGULATOR_EVENT_OVER_CURRENT, NULL);
return IRQ_HANDLED;
}
static irqreturn_t mt6360_ov_event_handler(int irq, void *data)
{
struct regulator_dev *rdev = data;
regulator_notifier_call_chain(rdev, REGULATOR_EVENT_REGULATION_OUT, NULL);
return IRQ_HANDLED;
}
static irqreturn_t mt6360_uv_event_handler(int irq, void *data)
{
struct regulator_dev *rdev = data;
regulator_notifier_call_chain(rdev, REGULATOR_EVENT_UNDER_VOLTAGE, NULL);
return IRQ_HANDLED;
}
static const struct mt6360_irq_mapping buck1_irq_tbls[] = {
{ "buck1_pgb_evt", mt6360_pgb_event_handler },
{ "buck1_oc_evt", mt6360_oc_event_handler },
{ "buck1_ov_evt", mt6360_ov_event_handler },
{ "buck1_uv_evt", mt6360_uv_event_handler },
};
static const struct mt6360_irq_mapping buck2_irq_tbls[] = {
{ "buck2_pgb_evt", mt6360_pgb_event_handler },
{ "buck2_oc_evt", mt6360_oc_event_handler },
{ "buck2_ov_evt", mt6360_ov_event_handler },
{ "buck2_uv_evt", mt6360_uv_event_handler },
};
static const struct mt6360_irq_mapping ldo6_irq_tbls[] = {
{ "ldo6_pgb_evt", mt6360_pgb_event_handler },
{ "ldo6_oc_evt", mt6360_oc_event_handler },
};
static const struct mt6360_irq_mapping ldo7_irq_tbls[] = {
{ "ldo7_pgb_evt", mt6360_pgb_event_handler },
{ "ldo7_oc_evt", mt6360_oc_event_handler },
};
static const struct mt6360_irq_mapping ldo1_irq_tbls[] = {
{ "ldo1_pgb_evt", mt6360_pgb_event_handler },
{ "ldo1_oc_evt", mt6360_oc_event_handler },
};
static const struct mt6360_irq_mapping ldo2_irq_tbls[] = {
{ "ldo2_pgb_evt", mt6360_pgb_event_handler },
{ "ldo2_oc_evt", mt6360_oc_event_handler },
};
static const struct mt6360_irq_mapping ldo3_irq_tbls[] = {
{ "ldo3_pgb_evt", mt6360_pgb_event_handler },
{ "ldo3_oc_evt", mt6360_oc_event_handler },
};
static const struct mt6360_irq_mapping ldo5_irq_tbls[] = {
{ "ldo5_pgb_evt", mt6360_pgb_event_handler },
{ "ldo5_oc_evt", mt6360_oc_event_handler },
};
static const struct linear_range buck_vout_ranges[] = {
REGULATOR_LINEAR_RANGE(300000, 0x00, 0xc7, 5000),
REGULATOR_LINEAR_RANGE(1300000, 0xc8, 0xff, 0),
};
static const struct linear_range ldo_vout_ranges1[] = {
REGULATOR_LINEAR_RANGE(500000, 0x00, 0x09, 10000),
REGULATOR_LINEAR_RANGE(600000, 0x0a, 0x10, 0),
REGULATOR_LINEAR_RANGE(610000, 0x11, 0x19, 10000),
REGULATOR_LINEAR_RANGE(700000, 0x1a, 0x20, 0),
REGULATOR_LINEAR_RANGE(710000, 0x21, 0x29, 10000),
REGULATOR_LINEAR_RANGE(800000, 0x2a, 0x30, 0),
REGULATOR_LINEAR_RANGE(810000, 0x31, 0x39, 10000),
REGULATOR_LINEAR_RANGE(900000, 0x3a, 0x40, 0),
REGULATOR_LINEAR_RANGE(910000, 0x41, 0x49, 10000),
REGULATOR_LINEAR_RANGE(1000000, 0x4a, 0x50, 0),
REGULATOR_LINEAR_RANGE(1010000, 0x51, 0x59, 10000),
REGULATOR_LINEAR_RANGE(1100000, 0x5a, 0x60, 0),
REGULATOR_LINEAR_RANGE(1110000, 0x61, 0x69, 10000),
REGULATOR_LINEAR_RANGE(1200000, 0x6a, 0x70, 0),
REGULATOR_LINEAR_RANGE(1210000, 0x71, 0x79, 10000),
REGULATOR_LINEAR_RANGE(1300000, 0x7a, 0x80, 0),
REGULATOR_LINEAR_RANGE(1310000, 0x81, 0x89, 10000),
REGULATOR_LINEAR_RANGE(1400000, 0x8a, 0x90, 0),
REGULATOR_LINEAR_RANGE(1410000, 0x91, 0x99, 10000),
REGULATOR_LINEAR_RANGE(1500000, 0x9a, 0xa0, 0),
REGULATOR_LINEAR_RANGE(1510000, 0xa1, 0xa9, 10000),
REGULATOR_LINEAR_RANGE(1600000, 0xaa, 0xb0, 0),
REGULATOR_LINEAR_RANGE(1610000, 0xb1, 0xb9, 10000),
REGULATOR_LINEAR_RANGE(1700000, 0xba, 0xc0, 0),
REGULATOR_LINEAR_RANGE(1710000, 0xc1, 0xc9, 10000),
REGULATOR_LINEAR_RANGE(1800000, 0xca, 0xd0, 0),
REGULATOR_LINEAR_RANGE(1810000, 0xd1, 0xd9, 10000),
REGULATOR_LINEAR_RANGE(1900000, 0xda, 0xe0, 0),
REGULATOR_LINEAR_RANGE(1910000, 0xe1, 0xe9, 10000),
REGULATOR_LINEAR_RANGE(2000000, 0xea, 0xf0, 0),
REGULATOR_LINEAR_RANGE(2010000, 0xf1, 0xf9, 10000),
REGULATOR_LINEAR_RANGE(2100000, 0xfa, 0xff, 0),
};
static const struct linear_range ldo_vout_ranges2[] = {
REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x09, 10000),
REGULATOR_LINEAR_RANGE(1300000, 0x0a, 0x10, 0),
REGULATOR_LINEAR_RANGE(1310000, 0x11, 0x19, 10000),
REGULATOR_LINEAR_RANGE(1400000, 0x1a, 0x1f, 0),
REGULATOR_LINEAR_RANGE(1500000, 0x20, 0x29, 10000),
REGULATOR_LINEAR_RANGE(1600000, 0x2a, 0x2f, 0),
REGULATOR_LINEAR_RANGE(1700000, 0x30, 0x39, 10000),
REGULATOR_LINEAR_RANGE(1800000, 0x3a, 0x40, 0),
REGULATOR_LINEAR_RANGE(1810000, 0x41, 0x49, 10000),
REGULATOR_LINEAR_RANGE(1900000, 0x4a, 0x4f, 0),
REGULATOR_LINEAR_RANGE(2000000, 0x50, 0x59, 10000),
REGULATOR_LINEAR_RANGE(2100000, 0x5a, 0x60, 0),
REGULATOR_LINEAR_RANGE(2110000, 0x61, 0x69, 10000),
REGULATOR_LINEAR_RANGE(2200000, 0x6a, 0x6f, 0),
REGULATOR_LINEAR_RANGE(2500000, 0x70, 0x79, 10000),
REGULATOR_LINEAR_RANGE(2600000, 0x7a, 0x7f, 0),
REGULATOR_LINEAR_RANGE(2700000, 0x80, 0x89, 10000),
REGULATOR_LINEAR_RANGE(2800000, 0x8a, 0x90, 0),
REGULATOR_LINEAR_RANGE(2810000, 0x91, 0x99, 10000),
REGULATOR_LINEAR_RANGE(2900000, 0x9a, 0xa0, 0),
REGULATOR_LINEAR_RANGE(2910000, 0xa1, 0xa9, 10000),
REGULATOR_LINEAR_RANGE(3000000, 0xaa, 0xb0, 0),
REGULATOR_LINEAR_RANGE(3010000, 0xb1, 0xb9, 10000),
REGULATOR_LINEAR_RANGE(3100000, 0xba, 0xc0, 0),
REGULATOR_LINEAR_RANGE(3110000, 0xc1, 0xc9, 10000),
REGULATOR_LINEAR_RANGE(3200000, 0xca, 0xcf, 0),
REGULATOR_LINEAR_RANGE(3300000, 0xd0, 0xd9, 10000),
REGULATOR_LINEAR_RANGE(3400000, 0xda, 0xe0, 0),
REGULATOR_LINEAR_RANGE(3410000, 0xe1, 0xe9, 10000),
REGULATOR_LINEAR_RANGE(3500000, 0xea, 0xf0, 0),
REGULATOR_LINEAR_RANGE(3510000, 0xf1, 0xf9, 10000),
REGULATOR_LINEAR_RANGE(3600000, 0xfa, 0xff, 0),
};
static const struct linear_range ldo_vout_ranges3[] = {
REGULATOR_LINEAR_RANGE(2700000, 0x00, 0x09, 10000),
REGULATOR_LINEAR_RANGE(2800000, 0x0a, 0x10, 0),
REGULATOR_LINEAR_RANGE(2810000, 0x11, 0x19, 10000),
REGULATOR_LINEAR_RANGE(2900000, 0x1a, 0x20, 0),
REGULATOR_LINEAR_RANGE(2910000, 0x21, 0x29, 10000),
REGULATOR_LINEAR_RANGE(3000000, 0x2a, 0x30, 0),
REGULATOR_LINEAR_RANGE(3010000, 0x31, 0x39, 10000),
REGULATOR_LINEAR_RANGE(3100000, 0x3a, 0x40, 0),
REGULATOR_LINEAR_RANGE(3110000, 0x41, 0x49, 10000),
REGULATOR_LINEAR_RANGE(3200000, 0x4a, 0x4f, 0),
REGULATOR_LINEAR_RANGE(3300000, 0x50, 0x59, 10000),
REGULATOR_LINEAR_RANGE(3400000, 0x5a, 0x60, 0),
REGULATOR_LINEAR_RANGE(3410000, 0x61, 0x69, 10000),
REGULATOR_LINEAR_RANGE(3500000, 0x6a, 0x70, 0),
REGULATOR_LINEAR_RANGE(3510000, 0x71, 0x79, 10000),
REGULATOR_LINEAR_RANGE(3600000, 0x7a, 0x7f, 0),
};
static int mt6360_regulator_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc;
struct regmap *regmap = rdev_get_regmap(rdev);
int shift = ffs(rdesc->mode_mask) - 1;
unsigned int val;
int ret;
switch (mode) {
case REGULATOR_MODE_NORMAL:
val = MT6360_OPMODE_NORMAL;
break;
case REGULATOR_MODE_STANDBY:
val = MT6360_OPMODE_ULP;
break;
case REGULATOR_MODE_IDLE:
val = MT6360_OPMODE_LP;
break;
default:
return -EINVAL;
}
ret = regmap_update_bits(regmap, rdesc->mode_reg, rdesc->mode_mask, val << shift);
if (ret) {
dev_err(&rdev->dev, "%s: fail (%d)\n", __func__, ret);
return ret;
}
return 0;
}
static unsigned int mt6360_regulator_get_mode(struct regulator_dev *rdev)
{
const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc;
struct regmap *regmap = rdev_get_regmap(rdev);
int shift = ffs(rdesc->mode_mask) - 1;
unsigned int val;
int ret;
ret = regmap_read(regmap, rdesc->mode_reg, &val);
if (ret)
return ret;
val &= rdesc->mode_mask;
val >>= shift;
switch (val) {
case MT6360_OPMODE_LP:
return REGULATOR_MODE_IDLE;
case MT6360_OPMODE_ULP:
return REGULATOR_MODE_STANDBY;
case MT6360_OPMODE_NORMAL:
return REGULATOR_MODE_NORMAL;
default:
return -EINVAL;
}
}
static int mt6360_regulator_get_status(struct regulator_dev *rdev)
{
const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc;
struct regmap *regmap = rdev_get_regmap(rdev);
unsigned int val;
int ret;
ret = regmap_read(regmap, rdesc->state_reg, &val);
if (ret)
return ret;
if (val & rdesc->state_mask)
return REGULATOR_STATUS_ON;
return REGULATOR_STATUS_OFF;
}
static const struct regulator_ops mt6360_regulator_ops = {
.list_voltage = regulator_list_voltage_linear_range,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_mode = mt6360_regulator_set_mode,
.get_mode = mt6360_regulator_get_mode,
.get_status = mt6360_regulator_get_status,
};
static unsigned int mt6360_regulator_of_map_mode(unsigned int hw_mode)
{
switch (hw_mode) {
case MT6360_OPMODE_NORMAL:
return REGULATOR_MODE_NORMAL;
case MT6360_OPMODE_LP:
return REGULATOR_MODE_IDLE;
case MT6360_OPMODE_ULP:
return REGULATOR_MODE_STANDBY;
default:
return REGULATOR_MODE_INVALID;
}
}
#define MT6360_REGULATOR_DESC(_name, _sname, ereg, emask, vreg, vmask, \
mreg, mmask, streg, stmask, vranges, \
vcnts, offon_delay, irq_tbls) \
{ \
.desc = { \
.name = #_name, \
.supply_name = #_sname, \
.id = MT6360_REGULATOR_##_name, \
.of_match = of_match_ptr(#_name), \
.regulators_node = of_match_ptr("regulator"), \
.of_map_mode = mt6360_regulator_of_map_mode, \
.owner = THIS_MODULE, \
.ops = &mt6360_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.vsel_reg = vreg, \
.vsel_mask = vmask, \
.enable_reg = ereg, \
.enable_mask = emask, \
.linear_ranges = vranges, \
.n_linear_ranges = ARRAY_SIZE(vranges), \
.n_voltages = vcnts, \
.off_on_delay = offon_delay, \
}, \
.mode_reg = mreg, \
.mode_mask = mmask, \
.state_reg = streg, \
.state_mask = stmask, \
.irq_tables = irq_tbls, \
.irq_table_size = ARRAY_SIZE(irq_tbls), \
}
static const struct mt6360_regulator_desc mt6360_regulator_descs[] = {
MT6360_REGULATOR_DESC(BUCK1, BUCK1_VIN, 0x117, 0x40, 0x110, 0xff, 0x117, 0x30, 0x117, 0x04,
buck_vout_ranges, 256, 0, buck1_irq_tbls),
MT6360_REGULATOR_DESC(BUCK2, BUCK2_VIN, 0x127, 0x40, 0x120, 0xff, 0x127, 0x30, 0x127, 0x04,
buck_vout_ranges, 256, 0, buck2_irq_tbls),
MT6360_REGULATOR_DESC(LDO6, LDO_VIN3, 0x137, 0x40, 0x13B, 0xff, 0x137, 0x30, 0x137, 0x04,
ldo_vout_ranges1, 256, 0, ldo6_irq_tbls),
MT6360_REGULATOR_DESC(LDO7, LDO_VIN3, 0x131, 0x40, 0x135, 0xff, 0x131, 0x30, 0x131, 0x04,
ldo_vout_ranges1, 256, 0, ldo7_irq_tbls),
MT6360_REGULATOR_DESC(LDO1, LDO_VIN1, 0x217, 0x40, 0x21B, 0xff, 0x217, 0x30, 0x217, 0x04,
ldo_vout_ranges2, 256, 0, ldo1_irq_tbls),
MT6360_REGULATOR_DESC(LDO2, LDO_VIN1, 0x211, 0x40, 0x215, 0xff, 0x211, 0x30, 0x211, 0x04,
ldo_vout_ranges2, 256, 0, ldo2_irq_tbls),
MT6360_REGULATOR_DESC(LDO3, LDO_VIN1, 0x205, 0x40, 0x209, 0xff, 0x205, 0x30, 0x205, 0x04,
ldo_vout_ranges2, 256, 100, ldo3_irq_tbls),
MT6360_REGULATOR_DESC(LDO5, LDO_VIN2, 0x20B, 0x40, 0x20F, 0x7f, 0x20B, 0x30, 0x20B, 0x04,
ldo_vout_ranges3, 128, 100, ldo5_irq_tbls),
};
static int mt6360_regulator_irq_register(struct platform_device *pdev,
struct regulator_dev *rdev,
const struct mt6360_irq_mapping *tbls,
int tbl_size)
{
int i, irq, ret;
for (i = 0; i < tbl_size; i++) {
const struct mt6360_irq_mapping *irq_desc = tbls + i;
irq = platform_get_irq_byname(pdev, irq_desc->name);
if (irq < 0) {
dev_err(&pdev->dev, "Fail to get %s irq\n", irq_desc->name);
return irq;
}
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, irq_desc->handler, 0,
irq_desc->name, rdev);
if (ret) {
dev_err(&pdev->dev, "Fail to request %s irq\n", irq_desc->name);
return ret;
}
}
return 0;
}
static int mt6360_regulator_probe(struct platform_device *pdev)
{
struct mt6360_regulator_data *mrd;
struct regulator_config config = {};
int i, ret;
mrd = devm_kzalloc(&pdev->dev, sizeof(*mrd), GFP_KERNEL);
if (!mrd)
return -ENOMEM;
mrd->dev = &pdev->dev;
mrd->regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!mrd->regmap) {
dev_err(&pdev->dev, "Failed to get parent regmap\n");
return -ENODEV;
}
config.dev = pdev->dev.parent;
config.driver_data = mrd;
config.regmap = mrd->regmap;
for (i = 0; i < ARRAY_SIZE(mt6360_regulator_descs); i++) {
const struct mt6360_regulator_desc *rdesc = mt6360_regulator_descs + i;
struct regulator_dev *rdev;
rdev = devm_regulator_register(&pdev->dev, &rdesc->desc, &config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "Failed to register %d regulator\n", i);
return PTR_ERR(rdev);
}
ret = mt6360_regulator_irq_register(pdev, rdev, rdesc->irq_tables,
rdesc->irq_table_size);
if (ret) {
dev_err(&pdev->dev, "Failed to register %d regulator irqs\n", i);
return ret;
}
}
return 0;
}
static const struct platform_device_id mt6360_regulator_id_table[] = {
{ "mt6360-regulator", 0 },
{},
};
MODULE_DEVICE_TABLE(platform, mt6360_regulator_id_table);
static struct platform_driver mt6360_regulator_driver = {
.driver = {
.name = "mt6360-regulator",
},
.probe = mt6360_regulator_probe,
.id_table = mt6360_regulator_id_table,
};
module_platform_driver(mt6360_regulator_driver);
MODULE_AUTHOR("Gene Chen <gene_chen@richtek.com>");
MODULE_DESCRIPTION("MT6360 Regulator Driver");
MODULE_LICENSE("GPL v2");
