forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
420 lines
12 KiB
420 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0+ |
|
|
|
#include <linux/bits.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 <linux/regulator/of_regulator.h> |
|
|
|
#define RT5120_REG_PGSTAT 0x03 |
|
#define RT5120_REG_CH1VID 0x06 |
|
#define RT5120_REG_CH1SLPVID 0x07 |
|
#define RT5120_REG_ENABLE 0x08 |
|
#define RT5120_REG_MODECTL 0x09 |
|
#define RT5120_REG_UVOVPROT 0x0A |
|
#define RT5120_REG_SLPCTL 0x0C |
|
#define RT5120_REG_INTSTAT 0x1E |
|
#define RT5120_REG_DISCHG 0x1F |
|
|
|
#define RT5120_OUTPG_MASK(rid) BIT(rid + 1) |
|
#define RT5120_OUTUV_MASK(rid) BIT(rid + 9) |
|
#define RT5120_OUTOV_MASK(rid) BIT(rid + 16) |
|
#define RT5120_CH1VID_MASK GENMASK(6, 0) |
|
#define RT5120_RIDEN_MASK(rid) BIT(rid + 1) |
|
#define RT5120_RADEN_MASK(rid) BIT(rid) |
|
#define RT5120_FPWM_MASK(rid) BIT(rid + 1) |
|
#define RT5120_UVHICCUP_MASK BIT(1) |
|
#define RT5120_OVHICCUP_MASK BIT(0) |
|
#define RT5120_HOTDIE_MASK BIT(1) |
|
|
|
#define RT5120_BUCK1_MINUV 600000 |
|
#define RT5120_BUCK1_MAXUV 1393750 |
|
#define RT5120_BUCK1_STEPUV 6250 |
|
#define RT5120_BUCK1_NUM_VOLT 0x80 |
|
|
|
#define RT5120_AUTO_MODE 0 |
|
#define RT5120_FPWM_MODE 1 |
|
|
|
enum { |
|
RT5120_REGULATOR_BUCK1 = 0, |
|
RT5120_REGULATOR_BUCK2, |
|
RT5120_REGULATOR_BUCK3, |
|
RT5120_REGULATOR_BUCK4, |
|
RT5120_REGULATOR_LDO, |
|
RT5120_REGULATOR_EXTEN, |
|
RT5120_MAX_REGULATOR |
|
}; |
|
|
|
struct rt5120_priv { |
|
struct device *dev; |
|
struct regmap *regmap; |
|
struct regulator_desc rdesc[RT5120_MAX_REGULATOR]; |
|
}; |
|
|
|
static int rt5120_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) |
|
{ |
|
struct regmap *regmap = rdev_get_regmap(rdev); |
|
int rid = rdev_get_id(rdev); |
|
unsigned int mask = RT5120_FPWM_MASK(rid), val; |
|
|
|
switch (mode) { |
|
case REGULATOR_MODE_NORMAL: |
|
val = 0; |
|
break; |
|
case REGULATOR_MODE_FAST: |
|
val = RT5120_FPWM_MASK(rid); |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return regmap_update_bits(regmap, RT5120_REG_MODECTL, mask, val); |
|
} |
|
|
|
static unsigned int rt5120_buck_get_mode(struct regulator_dev *rdev) |
|
{ |
|
struct regmap *regmap = rdev_get_regmap(rdev); |
|
int ret, rid = rdev_get_id(rdev); |
|
unsigned int val; |
|
|
|
ret = regmap_read(regmap, RT5120_REG_MODECTL, &val); |
|
if (ret) |
|
return REGULATOR_MODE_INVALID; |
|
|
|
if (val & RT5120_FPWM_MASK(rid)) |
|
return REGULATOR_MODE_FAST; |
|
|
|
return REGULATOR_MODE_NORMAL; |
|
} |
|
|
|
static int rt5120_regulator_get_error_flags(struct regulator_dev *rdev, |
|
unsigned int *flags) |
|
{ |
|
struct regmap *regmap = rdev_get_regmap(rdev); |
|
unsigned int stat, hd_stat, cur_flags = 0; |
|
int rid = rdev_get_id(rdev), ret; |
|
|
|
/* |
|
* reg 0x03/0x04/0x05 to indicate PG/UV/OV |
|
* use block read to descrease I/O xfer time |
|
*/ |
|
ret = regmap_raw_read(regmap, RT5120_REG_PGSTAT, &stat, 3); |
|
if (ret) |
|
return ret; |
|
|
|
ret = regmap_read(regmap, RT5120_REG_INTSTAT, &hd_stat); |
|
if (ret) |
|
return ret; |
|
|
|
if (!(stat & RT5120_OUTPG_MASK(rid))) { |
|
if (stat & RT5120_OUTUV_MASK(rid)) |
|
cur_flags |= REGULATOR_ERROR_UNDER_VOLTAGE; |
|
|
|
if (stat & RT5120_OUTOV_MASK(rid)) |
|
cur_flags |= REGULATOR_ERROR_REGULATION_OUT; |
|
} |
|
|
|
if (hd_stat & RT5120_HOTDIE_MASK) |
|
cur_flags |= REGULATOR_ERROR_OVER_TEMP; |
|
|
|
*flags = cur_flags; |
|
return 0; |
|
} |
|
|
|
static int rt5120_buck1_set_suspend_voltage(struct regulator_dev *rdev, int uV) |
|
{ |
|
struct regmap *regmap = rdev_get_regmap(rdev); |
|
int sel; |
|
|
|
if (uV < RT5120_BUCK1_MINUV || uV > RT5120_BUCK1_MAXUV) |
|
return -EINVAL; |
|
|
|
sel = (uV - RT5120_BUCK1_MINUV) / RT5120_BUCK1_STEPUV; |
|
return regmap_write(regmap, RT5120_REG_CH1SLPVID, sel); |
|
} |
|
|
|
static int rt5120_regulator_set_suspend_enable(struct regulator_dev *rdev) |
|
{ |
|
struct regmap *regmap = rdev_get_regmap(rdev); |
|
int rid = rdev_get_id(rdev); |
|
unsigned int mask = RT5120_RIDEN_MASK(rid); |
|
|
|
return regmap_update_bits(regmap, RT5120_REG_SLPCTL, mask, mask); |
|
} |
|
|
|
static int rt5120_regulator_set_suspend_disable(struct regulator_dev *rdev) |
|
{ |
|
struct regmap *regmap = rdev_get_regmap(rdev); |
|
int rid = rdev_get_id(rdev); |
|
unsigned int mask = RT5120_RIDEN_MASK(rid); |
|
|
|
return regmap_update_bits(regmap, RT5120_REG_SLPCTL, mask, 0); |
|
} |
|
|
|
static const struct regulator_ops rt5120_buck1_ops = { |
|
.enable = regulator_enable_regmap, |
|
.disable = regulator_disable_regmap, |
|
.is_enabled = regulator_is_enabled_regmap, |
|
.list_voltage = regulator_list_voltage_linear, |
|
.set_voltage_sel = regulator_set_voltage_sel_regmap, |
|
.get_voltage_sel = regulator_get_voltage_sel_regmap, |
|
.set_active_discharge = regulator_set_active_discharge_regmap, |
|
.set_mode = rt5120_buck_set_mode, |
|
.get_mode = rt5120_buck_get_mode, |
|
.get_error_flags = rt5120_regulator_get_error_flags, |
|
.set_suspend_voltage = rt5120_buck1_set_suspend_voltage, |
|
.set_suspend_enable = rt5120_regulator_set_suspend_enable, |
|
.set_suspend_disable = rt5120_regulator_set_suspend_disable, |
|
}; |
|
|
|
static const struct regulator_ops rt5120_buck234_ops = { |
|
.enable = regulator_enable_regmap, |
|
.disable = regulator_disable_regmap, |
|
.is_enabled = regulator_is_enabled_regmap, |
|
.set_active_discharge = regulator_set_active_discharge_regmap, |
|
.set_mode = rt5120_buck_set_mode, |
|
.get_mode = rt5120_buck_get_mode, |
|
.get_error_flags = rt5120_regulator_get_error_flags, |
|
.set_suspend_enable = rt5120_regulator_set_suspend_enable, |
|
.set_suspend_disable = rt5120_regulator_set_suspend_disable, |
|
}; |
|
|
|
static const struct regulator_ops rt5120_ldo_ops = { |
|
.enable = regulator_enable_regmap, |
|
.disable = regulator_disable_regmap, |
|
.is_enabled = regulator_is_enabled_regmap, |
|
.set_active_discharge = regulator_set_active_discharge_regmap, |
|
.get_error_flags = rt5120_regulator_get_error_flags, |
|
.set_suspend_enable = rt5120_regulator_set_suspend_enable, |
|
.set_suspend_disable = rt5120_regulator_set_suspend_disable, |
|
}; |
|
|
|
static const struct regulator_ops rt5120_exten_ops = { |
|
.enable = regulator_enable_regmap, |
|
.disable = regulator_disable_regmap, |
|
.is_enabled = regulator_is_enabled_regmap, |
|
.set_suspend_enable = rt5120_regulator_set_suspend_enable, |
|
.set_suspend_disable = rt5120_regulator_set_suspend_disable, |
|
}; |
|
|
|
static unsigned int rt5120_buck_of_map_mode(unsigned int mode) |
|
{ |
|
switch (mode) { |
|
case RT5120_AUTO_MODE: |
|
return REGULATOR_MODE_NORMAL; |
|
case RT5120_FPWM_MODE: |
|
return REGULATOR_MODE_FAST; |
|
default: |
|
return REGULATOR_MODE_INVALID; |
|
} |
|
} |
|
|
|
static void rt5120_fillin_regulator_desc(struct regulator_desc *desc, int rid) |
|
{ |
|
static const char * const name[] = { |
|
"buck1", "buck2", "buck3", "buck4", "ldo", "exten" }; |
|
static const char * const sname[] = { |
|
"vin1", "vin2", "vin3", "vin4", "vinldo", NULL }; |
|
|
|
/* Common regulator property */ |
|
desc->name = name[rid]; |
|
desc->supply_name = sname[rid]; |
|
desc->owner = THIS_MODULE; |
|
desc->type = REGULATOR_VOLTAGE; |
|
desc->id = rid; |
|
desc->enable_reg = RT5120_REG_ENABLE; |
|
desc->enable_mask = RT5120_RIDEN_MASK(rid); |
|
desc->active_discharge_reg = RT5120_REG_DISCHG; |
|
desc->active_discharge_mask = RT5120_RADEN_MASK(rid); |
|
desc->active_discharge_on = RT5120_RADEN_MASK(rid); |
|
/* Config n_voltages to 1 for all*/ |
|
desc->n_voltages = 1; |
|
|
|
/* Only buck support mode change */ |
|
if (rid >= RT5120_REGULATOR_BUCK1 && rid <= RT5120_REGULATOR_BUCK4) |
|
desc->of_map_mode = rt5120_buck_of_map_mode; |
|
|
|
/* RID specific property init */ |
|
switch (rid) { |
|
case RT5120_REGULATOR_BUCK1: |
|
/* Only buck1 support voltage change by I2C */ |
|
desc->n_voltages = RT5120_BUCK1_NUM_VOLT; |
|
desc->min_uV = RT5120_BUCK1_MINUV; |
|
desc->uV_step = RT5120_BUCK1_STEPUV; |
|
desc->vsel_reg = RT5120_REG_CH1VID, |
|
desc->vsel_mask = RT5120_CH1VID_MASK, |
|
desc->ops = &rt5120_buck1_ops; |
|
break; |
|
case RT5120_REGULATOR_BUCK2 ... RT5120_REGULATOR_BUCK4: |
|
desc->ops = &rt5120_buck234_ops; |
|
break; |
|
case RT5120_REGULATOR_LDO: |
|
desc->ops = &rt5120_ldo_ops; |
|
break; |
|
default: |
|
desc->ops = &rt5120_exten_ops; |
|
} |
|
} |
|
|
|
static int rt5120_of_parse_cb(struct rt5120_priv *priv, int rid, |
|
struct of_regulator_match *match) |
|
{ |
|
struct regulator_desc *desc = priv->rdesc + rid; |
|
struct regulator_init_data *init_data = match->init_data; |
|
|
|
if (!init_data || rid == RT5120_REGULATOR_BUCK1) |
|
return 0; |
|
|
|
if (init_data->constraints.min_uV != init_data->constraints.max_uV) { |
|
dev_err(priv->dev, "Variable voltage for fixed regulator\n"); |
|
return -EINVAL; |
|
} |
|
|
|
desc->fixed_uV = init_data->constraints.min_uV; |
|
return 0; |
|
} |
|
|
|
static struct of_regulator_match rt5120_regu_match[RT5120_MAX_REGULATOR] = { |
|
[RT5120_REGULATOR_BUCK1] = { .name = "buck1", }, |
|
[RT5120_REGULATOR_BUCK2] = { .name = "buck2", }, |
|
[RT5120_REGULATOR_BUCK3] = { .name = "buck3", }, |
|
[RT5120_REGULATOR_BUCK4] = { .name = "buck4", }, |
|
[RT5120_REGULATOR_LDO] = { .name = "ldo", }, |
|
[RT5120_REGULATOR_EXTEN] = { .name = "exten", } |
|
}; |
|
|
|
static int rt5120_parse_regulator_dt_data(struct rt5120_priv *priv) |
|
{ |
|
struct device *dev = priv->dev->parent; |
|
struct device_node *reg_node; |
|
int i, ret; |
|
|
|
for (i = 0; i < RT5120_MAX_REGULATOR; i++) { |
|
rt5120_fillin_regulator_desc(priv->rdesc + i, i); |
|
|
|
rt5120_regu_match[i].desc = priv->rdesc + i; |
|
} |
|
|
|
reg_node = of_get_child_by_name(dev->of_node, "regulators"); |
|
if (!reg_node) { |
|
dev_err(priv->dev, "Couldn't find 'regulators' node\n"); |
|
return -ENODEV; |
|
} |
|
|
|
ret = of_regulator_match(priv->dev, reg_node, rt5120_regu_match, |
|
ARRAY_SIZE(rt5120_regu_match)); |
|
|
|
of_node_put(reg_node); |
|
|
|
if (ret < 0) { |
|
dev_err(priv->dev, |
|
"Error parsing regulator init data (%d)\n", ret); |
|
return ret; |
|
} |
|
|
|
for (i = 0; i < RT5120_MAX_REGULATOR; i++) { |
|
ret = rt5120_of_parse_cb(priv, i, rt5120_regu_match + i); |
|
if (ret) { |
|
dev_err(priv->dev, "Failed in [%d] of_passe_cb\n", i); |
|
return ret; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int rt5120_device_property_init(struct rt5120_priv *priv) |
|
{ |
|
struct device *dev = priv->dev->parent; |
|
struct device_node *np = dev->of_node; |
|
bool prot_enable; |
|
unsigned int prot_enable_val = 0; |
|
|
|
/* Assign UV/OV HW protection behavior */ |
|
prot_enable = of_property_read_bool(np, |
|
"richtek,enable-undervolt-hiccup"); |
|
if (prot_enable) |
|
prot_enable_val |= RT5120_UVHICCUP_MASK; |
|
|
|
prot_enable = of_property_read_bool(np, |
|
"richtek,enable-overvolt-hiccup"); |
|
if (prot_enable) |
|
prot_enable_val |= RT5120_OVHICCUP_MASK; |
|
|
|
return regmap_update_bits(priv->regmap, RT5120_REG_UVOVPROT, |
|
RT5120_UVHICCUP_MASK | RT5120_OVHICCUP_MASK, |
|
prot_enable_val); |
|
} |
|
|
|
static int rt5120_regulator_probe(struct platform_device *pdev) |
|
{ |
|
struct rt5120_priv *priv; |
|
struct regulator_dev *rdev; |
|
struct regulator_config config = {}; |
|
int i, ret; |
|
|
|
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); |
|
if (!priv) |
|
return -ENOMEM; |
|
|
|
priv->dev = &pdev->dev; |
|
|
|
priv->regmap = dev_get_regmap(pdev->dev.parent, NULL); |
|
if (!priv->regmap) { |
|
dev_err(&pdev->dev, "Failed to init regmap\n"); |
|
return -ENODEV; |
|
} |
|
|
|
ret = rt5120_device_property_init(priv); |
|
if (ret) { |
|
dev_err(&pdev->dev, "Failed to do property init\n"); |
|
return ret; |
|
} |
|
|
|
ret = rt5120_parse_regulator_dt_data(priv); |
|
if (ret) { |
|
dev_err(&pdev->dev, "Failed to parse dt data\n"); |
|
return ret; |
|
} |
|
|
|
config.dev = &pdev->dev; |
|
config.regmap = priv->regmap; |
|
|
|
for (i = 0; i < RT5120_MAX_REGULATOR; i++) { |
|
config.of_node = rt5120_regu_match[i].of_node; |
|
config.init_data = rt5120_regu_match[i].init_data; |
|
|
|
rdev = devm_regulator_register(&pdev->dev, priv->rdesc + i, |
|
&config); |
|
if (IS_ERR(rdev)) { |
|
dev_err(&pdev->dev, |
|
"Failed to register regulator [%d]\n", i); |
|
return PTR_ERR(rdev); |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static const struct platform_device_id rt5120_regulator_dev_table[] = { |
|
{ "rt5120-regulator", 0 }, |
|
{} |
|
}; |
|
MODULE_DEVICE_TABLE(platform, rt5120_regulator_dev_table); |
|
|
|
static struct platform_driver rt5120_regulator_driver = { |
|
.driver = { |
|
.name = "rt5120-regulator", |
|
}, |
|
.id_table = rt5120_regulator_dev_table, |
|
.probe = rt5120_regulator_probe, |
|
}; |
|
module_platform_driver(rt5120_regulator_driver); |
|
|
|
MODULE_AUTHOR("ChiYuan Huang <[email protected]>"); |
|
MODULE_DESCRIPTION("Richtek RT5120 regulator driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|