#include <linux/bitops.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
enum {
RTQ2134_IDX_BUCK1 = 0,
RTQ2134_IDX_BUCK2,
RTQ2134_IDX_BUCK3,
RTQ2134_IDX_MAX
};
#define RTQ2134_AUTO_MODE 0
#define RTQ2134_FCCM_MODE 1
#define RTQ2134_BUCK_DVS0_CTRL 0
#define RTQ2134_BUCK_VSEL_CTRL 2
#define RTQ2134_REG_IO_CHIPNAME 0x01
#define RTQ2134_REG_FLT_RECORDTEMP 0x13
#define RTQ2134_REG_FLT_RECORDBUCK(_id) (0x14 + (_id))
#define RTQ2134_REG_FLT_BUCKCTRL(_id) (0x37 + (_id))
#define RTQ2134_REG_BUCK1_CFG0 0x42
#define RTQ2134_REG_BUCK1_DVS0CFG1 0x48
#define RTQ2134_REG_BUCK1_DVS0CFG0 0x49
#define RTQ2134_REG_BUCK1_DVS1CFG1 0x4A
#define RTQ2134_REG_BUCK1_DVS1CFG0 0x4B
#define RTQ2134_REG_BUCK1_DVSCFG 0x52
#define RTQ2134_REG_BUCK1_RSPCFG 0x54
#define RTQ2134_REG_BUCK2_CFG0 0x5F
#define RTQ2134_REG_BUCK2_DVS0CFG1 0x62
#define RTQ2134_REG_BUCK2_DVS0CFG0 0x63
#define RTQ2134_REG_BUCK2_DVS1CFG1 0x64
#define RTQ2134_REG_BUCK2_DVS1CFG0 0x65
#define RTQ2134_REG_BUCK2_DVSCFG 0x6C
#define RTQ2134_REG_BUCK2_RSPCFG 0x6E
#define RTQ2134_REG_BUCK3_CFG0 0x79
#define RTQ2134_REG_BUCK3_DVS0CFG1 0x7C
#define RTQ2134_REG_BUCK3_DVS0CFG0 0x7D
#define RTQ2134_REG_BUCK3_DVS1CFG1 0x7E
#define RTQ2134_REG_BUCK3_DVS1CFG0 0x7F
#define RTQ2134_REG_BUCK3_DVSCFG 0x86
#define RTQ2134_REG_BUCK3_RSPCFG 0x88
#define RTQ2134_REG_BUCK3_SLEWCTRL 0x89
#define RTQ2134_VOUT_MAXNUM 256
#define RTQ2134_VOUT_MASK 0xFF
#define RTQ2134_VOUTEN_MASK BIT(0)
#define RTQ2134_ACTDISCHG_MASK BIT(0)
#define RTQ2134_RSPUP_MASK GENMASK(6, 4)
#define RTQ2134_FCCM_MASK BIT(5)
#define RTQ2134_UVHICCUP_MASK BIT(3)
#define RTQ2134_BUCKDVS_CTRL_MASK GENMASK(1, 0)
#define RTQ2134_CHIPOT_MASK BIT(2)
#define RTQ2134_BUCKOV_MASK BIT(5)
#define RTQ2134_BUCKUV_MASK BIT(4)
struct rtq2134_regulator_desc {
struct regulator_desc desc;
unsigned int mode_reg;
unsigned int mode_mask;
unsigned int suspend_enable_reg;
unsigned int suspend_enable_mask;
unsigned int suspend_vsel_reg;
unsigned int suspend_vsel_mask;
unsigned int suspend_mode_reg;
unsigned int suspend_mode_mask;
unsigned int dvs_ctrl_reg;
};
static int rtq2134_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
struct rtq2134_regulator_desc *desc =
(struct rtq2134_regulator_desc *)rdev->desc;
unsigned int val;
if (mode == REGULATOR_MODE_NORMAL)
val = RTQ2134_AUTO_MODE;
else if (mode == REGULATOR_MODE_FAST)
val = RTQ2134_FCCM_MODE;
else
return -EINVAL;
val <<= ffs(desc->mode_mask) - 1;
return regmap_update_bits(rdev->regmap, desc->mode_reg, desc->mode_mask,
val);
}
static unsigned int rtq2134_buck_get_mode(struct regulator_dev *rdev)
{
struct rtq2134_regulator_desc *desc =
(struct rtq2134_regulator_desc *)rdev->desc;
unsigned int mode;
int ret;
ret = regmap_read(rdev->regmap, desc->mode_reg, &mode);
if (ret)
return ret;
if (mode & desc->mode_mask)
return REGULATOR_MODE_FAST;
return REGULATOR_MODE_NORMAL;
}
static int rtq2134_buck_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
struct rtq2134_regulator_desc *desc =
(struct rtq2134_regulator_desc *)rdev->desc;
int sel;
sel = regulator_map_voltage_linear_range(rdev, uV, uV);
if (sel < 0)
return sel;
sel <<= ffs(desc->suspend_vsel_mask) - 1;
return regmap_update_bits(rdev->regmap, desc->suspend_vsel_reg,
desc->suspend_vsel_mask, sel);
}
static int rtq2134_buck_set_suspend_enable(struct regulator_dev *rdev)
{
struct rtq2134_regulator_desc *desc =
(struct rtq2134_regulator_desc *)rdev->desc;
unsigned int val = desc->suspend_enable_mask;
return regmap_update_bits(rdev->regmap, desc->suspend_enable_reg,
desc->suspend_enable_mask, val);
}
static int rtq2134_buck_set_suspend_disable(struct regulator_dev *rdev)
{
struct rtq2134_regulator_desc *desc =
(struct rtq2134_regulator_desc *)rdev->desc;
return regmap_update_bits(rdev->regmap, desc->suspend_enable_reg,
desc->suspend_enable_mask, 0);
}
static int rtq2134_buck_set_suspend_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct rtq2134_regulator_desc *desc =
(struct rtq2134_regulator_desc *)rdev->desc;
unsigned int val;
if (mode == REGULATOR_MODE_NORMAL)
val = RTQ2134_AUTO_MODE;
else if (mode == REGULATOR_MODE_FAST)
val = RTQ2134_FCCM_MODE;
else
return -EINVAL;
val <<= ffs(desc->suspend_mode_mask) - 1;
return regmap_update_bits(rdev->regmap, desc->suspend_mode_reg,
desc->suspend_mode_mask, val);
}
static int rtq2134_buck_get_error_flags(struct regulator_dev *rdev,
unsigned int *flags)
{
int rid = rdev_get_id(rdev);
unsigned int chip_error, buck_error, events = 0;
int ret;
ret = regmap_read(rdev->regmap, RTQ2134_REG_FLT_RECORDTEMP,
&chip_error);
if (ret) {
dev_err(&rdev->dev, "Failed to get chip error flag\n");
return ret;
}
ret = regmap_read(rdev->regmap, RTQ2134_REG_FLT_RECORDBUCK(rid),
&buck_error);
if (ret) {
dev_err(&rdev->dev, "Failed to get buck error flag\n");
return ret;
}
if (chip_error & RTQ2134_CHIPOT_MASK)
events |= REGULATOR_ERROR_OVER_TEMP;
if (buck_error & RTQ2134_BUCKUV_MASK)
events |= REGULATOR_ERROR_UNDER_VOLTAGE;
if (buck_error & RTQ2134_BUCKOV_MASK)
events |= REGULATOR_ERROR_REGULATION_OUT;
*flags = events;
return 0;
}
static const struct regulator_ops rtq2134_buck_ops = {
.list_voltage = regulator_list_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.set_active_discharge = regulator_set_active_discharge_regmap,
.set_ramp_delay = regulator_set_ramp_delay_regmap,
.set_mode = rtq2134_buck_set_mode,
.get_mode = rtq2134_buck_get_mode,
.set_suspend_voltage = rtq2134_buck_set_suspend_voltage,
.set_suspend_enable = rtq2134_buck_set_suspend_enable,
.set_suspend_disable = rtq2134_buck_set_suspend_disable,
.set_suspend_mode = rtq2134_buck_set_suspend_mode,
.get_error_flags = rtq2134_buck_get_error_flags,
};
static const struct linear_range rtq2134_buck_vout_ranges[] = {
REGULATOR_LINEAR_RANGE(300000, 0, 200, 5000),
REGULATOR_LINEAR_RANGE(1310000, 201, 255, 10000)
};
static unsigned int rtq2134_buck_of_map_mode(unsigned int mode)
{
switch (mode) {
case RTQ2134_AUTO_MODE:
return REGULATOR_MODE_NORMAL;
case RTQ2134_FCCM_MODE:
return REGULATOR_MODE_FAST;
}
return REGULATOR_MODE_INVALID;
}
static int rtq2134_buck_of_parse_cb(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *cfg)
{
struct rtq2134_regulator_desc *rdesc =
(struct rtq2134_regulator_desc *)desc;
int rid = desc->id;
bool uv_shutdown, vsel_dvs;
unsigned int val;
int ret;
vsel_dvs = of_property_read_bool(np, "richtek,use-vsel-dvs");
if (vsel_dvs)
val = RTQ2134_BUCK_VSEL_CTRL;
else
val = RTQ2134_BUCK_DVS0_CTRL;
ret = regmap_update_bits(cfg->regmap, rdesc->dvs_ctrl_reg,
RTQ2134_BUCKDVS_CTRL_MASK, val);
if (ret)
return ret;
uv_shutdown = of_property_read_bool(np, "richtek,uv-shutdown");
if (uv_shutdown)
val = 0;
else
val = RTQ2134_UVHICCUP_MASK;
return regmap_update_bits(cfg->regmap, RTQ2134_REG_FLT_BUCKCTRL(rid),
RTQ2134_UVHICCUP_MASK, val);
}
static const unsigned int rtq2134_buck_ramp_delay_table[] = {
0, 16000, 0, 8000, 4000, 2000, 1000, 500
};
#define RTQ2134_BUCK_DESC(_id) { \
.desc = { \
.name = "rtq2134_buck" #_id, \
.of_match = of_match_ptr("buck" #_id), \
.regulators_node = of_match_ptr("regulators"), \
.id = RTQ2134_IDX_BUCK##_id, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.ops = &rtq2134_buck_ops, \
.n_voltages = RTQ2134_VOUT_MAXNUM, \
.linear_ranges = rtq2134_buck_vout_ranges, \
.n_linear_ranges = ARRAY_SIZE(rtq2134_buck_vout_ranges), \
.vsel_reg = RTQ2134_REG_BUCK##_id##_DVS0CFG1, \
.vsel_mask = RTQ2134_VOUT_MASK, \
.enable_reg = RTQ2134_REG_BUCK##_id##_DVS0CFG0, \
.enable_mask = RTQ2134_VOUTEN_MASK, \
.active_discharge_reg = RTQ2134_REG_BUCK##_id##_CFG0, \
.active_discharge_mask = RTQ2134_ACTDISCHG_MASK, \
.active_discharge_on = RTQ2134_ACTDISCHG_MASK, \
.ramp_reg = RTQ2134_REG_BUCK##_id##_RSPCFG, \
.ramp_mask = RTQ2134_RSPUP_MASK, \
.ramp_delay_table = rtq2134_buck_ramp_delay_table, \
.n_ramp_values = ARRAY_SIZE(rtq2134_buck_ramp_delay_table), \
.of_map_mode = rtq2134_buck_of_map_mode, \
.of_parse_cb = rtq2134_buck_of_parse_cb, \
}, \
.mode_reg = RTQ2134_REG_BUCK##_id##_DVS0CFG0, \
.mode_mask = RTQ2134_FCCM_MASK, \
.suspend_mode_reg = RTQ2134_REG_BUCK##_id##_DVS1CFG0, \
.suspend_mode_mask = RTQ2134_FCCM_MASK, \
.suspend_enable_reg = RTQ2134_REG_BUCK##_id##_DVS1CFG0, \
.suspend_enable_mask = RTQ2134_VOUTEN_MASK, \
.suspend_vsel_reg = RTQ2134_REG_BUCK##_id##_DVS1CFG1, \
.suspend_vsel_mask = RTQ2134_VOUT_MASK, \
.dvs_ctrl_reg = RTQ2134_REG_BUCK##_id##_DVSCFG, \
}
static const struct rtq2134_regulator_desc rtq2134_regulator_descs[] = {
RTQ2134_BUCK_DESC(1),
RTQ2134_BUCK_DESC(2),
RTQ2134_BUCK_DESC(3)
};
static bool rtq2134_is_accissible_reg(struct device *dev, unsigned int reg)
{
if (reg >= RTQ2134_REG_IO_CHIPNAME && reg <= RTQ2134_REG_BUCK3_SLEWCTRL)
return true;
return false;
}
static const struct regmap_config rtq2134_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = RTQ2134_REG_BUCK3_SLEWCTRL,
.readable_reg = rtq2134_is_accissible_reg,
.writeable_reg = rtq2134_is_accissible_reg,
};
static int rtq2134_probe(struct i2c_client *i2c)
{
struct regmap *regmap;
struct regulator_dev *rdev;
struct regulator_config regulator_cfg = {};
int i;
regmap = devm_regmap_init_i2c(i2c, &rtq2134_regmap_config);
if (IS_ERR(regmap)) {
dev_err(&i2c->dev, "Failed to allocate regmap\n");
return PTR_ERR(regmap);
}
regulator_cfg.dev = &i2c->dev;
regulator_cfg.regmap = regmap;
for (i = 0; i < ARRAY_SIZE(rtq2134_regulator_descs); i++) {
rdev = devm_regulator_register(&i2c->dev,
&rtq2134_regulator_descs[i].desc,
®ulator_cfg);
if (IS_ERR(rdev)) {
dev_err(&i2c->dev, "Failed to init %d regulator\n", i);
return PTR_ERR(rdev);
}
}
return 0;
}
static const struct of_device_id __maybe_unused rtq2134_device_tables[] = {
{ .compatible = "richtek,rtq2134", },
{}
};
MODULE_DEVICE_TABLE(of, rtq2134_device_tables);
static struct i2c_driver rtq2134_driver = {
.driver = {
.name = "rtq2134",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = rtq2134_device_tables,
},
.probe = rtq2134_probe,
};
module_i2c_driver(rtq2134_driver);
MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
MODULE_DESCRIPTION("Richtek RTQ2134 Regulator Driver");
MODULE_LICENSE("GPL v2");
