#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#define PF8X00_DEVICEID 0x00
#define PF8X00_REVID 0x01
#define PF8X00_EMREV 0x02
#define PF8X00_PROGID 0x03
#define PF8X00_IMS_INT 0x04
#define PF8X00_IMS_THERM 0x07
#define PF8X00_SW_MODE_INT 0x0a
#define PF8X00_SW_MODE_MASK 0x0b
#define PF8X00_IMS_SW_ILIM 0x12
#define PF8X00_IMS_LDO_ILIM 0x15
#define PF8X00_IMS_SW_UV 0x18
#define PF8X00_IMS_SW_OV 0x1b
#define PF8X00_IMS_LDO_UV 0x1e
#define PF8X00_IMS_LDO_OV 0x21
#define PF8X00_IMS_PWRON 0x24
#define PF8X00_SYS_INT 0x27
#define PF8X00_HARD_FAULT 0x29
#define PF8X00_FSOB_FLAGS 0x2a
#define PF8X00_FSOB_SELECT 0x2b
#define PF8X00_ABIST_OV1 0x2c
#define PF8X00_ABIST_OV2 0x2d
#define PF8X00_ABIST_UV1 0x2e
#define PF8X00_ABIST_UV2 0x2f
#define PF8X00_TEST_FLAGS 0x30
#define PF8X00_ABIST_RUN 0x31
#define PF8X00_RANDOM_GEN 0x33
#define PF8X00_RANDOM_CHK 0x34
#define PF8X00_VMONEN1 0x35
#define PF8X00_VMONEN2 0x36
#define PF8X00_CTRL1 0x37
#define PF8X00_CTRL2 0x38
#define PF8X00_CTRL3 0x39
#define PF8X00_PWRUP_CTRL 0x3a
#define PF8X00_RESETBMCU 0x3c
#define PF8X00_PGOOD 0x3d
#define PF8X00_PWRDN_DLY1 0x3e
#define PF8X00_PWRDN_DLY2 0x3f
#define PF8X00_FREQ_CTRL 0x40
#define PF8X00_COINCELL_CTRL 0x41
#define PF8X00_PWRON 0x42
#define PF8X00_WD_CONFIG 0x43
#define PF8X00_WD_CLEAR 0x44
#define PF8X00_WD_EXPIRE 0x45
#define PF8X00_WD_COUNTER 0x46
#define PF8X00_FAULT_COUNTER 0x47
#define PF8X00_FSAFE_COUNTER 0x48
#define PF8X00_FAULT_TIMER 0x49
#define PF8X00_AMUX 0x4a
#define PF8X00_SW1_CONFIG1 0x4d
#define PF8X00_LDO1_CONFIG1 0x85
#define PF8X00_VSNVS_CONFIG1 0x9d
#define PF8X00_PAGE_SELECT 0x9f
enum pf8x00_regulators {
PF8X00_LDO1,
PF8X00_LDO2,
PF8X00_LDO3,
PF8X00_LDO4,
PF8X00_BUCK1,
PF8X00_BUCK2,
PF8X00_BUCK3,
PF8X00_BUCK4,
PF8X00_BUCK5,
PF8X00_BUCK6,
PF8X00_BUCK7,
PF8X00_VSNVS,
PF8X00_MAX_REGULATORS,
};
enum pf8x00_buck_states {
SW_CONFIG1,
SW_CONFIG2,
SW_PWRUP,
SW_MODE1,
SW_RUN_VOLT,
SW_STBY_VOLT,
};
#define PF8X00_SW_BASE(i) (8 * (i - PF8X00_BUCK1) + PF8X00_SW1_CONFIG1)
enum pf8x00_ldo_states {
LDO_CONFIG1,
LDO_CONFIG2,
LDO_PWRUP,
LDO_RUN_VOLT,
LDO_STBY_VOLT,
};
#define PF8X00_LDO_BASE(i) (6 * (i - PF8X00_LDO1) + PF8X00_LDO1_CONFIG1)
enum swxilim_bits {
SWXILIM_2100_MA,
SWXILIM_2600_MA,
SWXILIM_3000_MA,
SWXILIM_4500_MA,
};
#define PF8X00_SWXILIM_SHIFT 3
#define PF8X00_SWXILIM_MASK GENMASK(4, 3)
#define PF8X00_SWXPHASE_MASK GENMASK(2, 0)
#define PF8X00_SWXPHASE_SHIFT 7
enum pf8x00_devid {
PF8100 = 0x0,
PF8121A = BIT(1),
PF8200 = BIT(3),
};
#define PF8X00_FAM BIT(6)
#define PF8X00_DEVICE_FAM_MASK GENMASK(7, 4)
#define PF8X00_DEVICE_ID_MASK GENMASK(3, 0)
struct pf8x00_regulator_data {
struct regulator_desc desc;
unsigned int suspend_enable_reg;
unsigned int suspend_enable_mask;
unsigned int suspend_voltage_reg;
unsigned int suspend_voltage_cache;
};
struct pf8x00_chip {
struct regmap *regmap;
struct device *dev;
};
static const struct regmap_config pf8x00_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = PF8X00_PAGE_SELECT,
.cache_type = REGCACHE_RBTREE,
};
static const int pf8x00_ldo_voltages[] = {
1500000, 1600000, 1800000, 1850000, 2150000, 2500000, 2800000, 3000000,
3100000, 3150000, 3200000, 3300000, 3350000, 1650000, 1700000, 5000000,
};
static const unsigned int pf8x00_sw_current_table[] = {
2100000, 2600000, 3000000, 4500000,
};
#define PF8XOO_SW1_6_VOLTAGE_NUM 0xB2
static const struct linear_range pf8x00_sw1_to_6_voltages[] = {
REGULATOR_LINEAR_RANGE(400000, 0x00, 0xB0, 6250),
REGULATOR_LINEAR_RANGE(1800000, 0xB1, 0xB1, 0),
};
static const int pf8x00_sw7_voltages[] = {
1000000, 1100000, 1200000, 1250000, 1300000, 1350000, 1500000, 1600000,
1800000, 1850000, 2000000, 2100000, 2150000, 2250000, 2300000, 2400000,
2500000, 2800000, 3150000, 3200000, 3250000, 3300000, 3350000, 3400000,
3500000, 3800000, 4000000, 4100000, 4100000, 4100000, 4100000, 4100000,
};
static const int pf8x00_vsnvs_voltages[] = {
0, 1800000, 3000000, 3300000,
};
static void swxilim_select(struct pf8x00_chip *chip, int id, int ilim)
{
u8 ilim_sel;
u8 reg = PF8X00_SW_BASE(id) + SW_CONFIG2;
switch (ilim) {
case 2100:
ilim_sel = SWXILIM_2100_MA;
break;
case 2600:
ilim_sel = SWXILIM_2600_MA;
break;
case 3000:
ilim_sel = SWXILIM_3000_MA;
break;
case 4500:
ilim_sel = SWXILIM_4500_MA;
break;
default:
ilim_sel = SWXILIM_2100_MA;
break;
}
regmap_update_bits(chip->regmap, reg,
PF8X00_SWXILIM_MASK,
ilim_sel << PF8X00_SWXILIM_SHIFT);
}
static void handle_ilim_property(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *config)
{
struct pf8x00_chip *chip = config->driver_data;
int ret;
int val;
if ((desc->id >= PF8X00_BUCK1) && (desc->id <= PF8X00_BUCK7)) {
ret = of_property_read_u32(np, "nxp,ilim-ma", &val);
if (ret) {
dev_dbg(chip->dev, "unspecified ilim for BUCK%d, use value stored in OTP\n",
desc->id - PF8X00_LDO4);
return;
}
dev_warn(chip->dev, "nxp,ilim-ma is deprecated, please use regulator-max-microamp\n");
swxilim_select(chip, desc->id, val);
} else
dev_warn(chip->dev, "nxp,ilim-ma used with incorrect regulator (%d)\n", desc->id);
}
static void handle_shift_property(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *config)
{
unsigned char id = desc->id - PF8X00_LDO4;
unsigned char reg = PF8X00_SW_BASE(id) + SW_CONFIG2;
struct pf8x00_chip *chip = config->driver_data;
int phase;
int val;
int ret;
if ((desc->id >= PF8X00_BUCK1) && (desc->id <= PF8X00_BUCK7)) {
ret = of_property_read_u32(np, "nxp,phase-shift", &val);
if (ret) {
dev_dbg(chip->dev,
"unspecified phase-shift for BUCK%d, using OTP configuration\n",
id);
return;
}
if (val < 0 || val > 315 || val % 45 != 0) {
dev_warn(config->dev,
"invalid phase_shift %d for BUCK%d, using OTP configuration\n",
val, id);
return;
}
phase = val / 45;
if (phase >= 1)
phase -= 1;
else
phase = PF8X00_SWXPHASE_SHIFT;
regmap_update_bits(chip->regmap, reg,
PF8X00_SWXPHASE_MASK,
phase);
} else
dev_warn(chip->dev, "nxp,phase-shift used with incorrect regulator (%d)\n", id);
}
static int pf8x00_of_parse_cb(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *config)
{
handle_ilim_property(np, desc, config);
handle_shift_property(np, desc, config);
return 0;
}
static int pf8x00_suspend_enable(struct regulator_dev *rdev)
{
struct pf8x00_regulator_data *regl = rdev_get_drvdata(rdev);
struct regmap *rmap = rdev_get_regmap(rdev);
return regmap_update_bits(rmap, regl->suspend_enable_reg,
regl->suspend_enable_mask,
regl->suspend_enable_mask);
}
static int pf8x00_suspend_disable(struct regulator_dev *rdev)
{
struct pf8x00_regulator_data *regl = rdev_get_drvdata(rdev);
struct regmap *rmap = rdev_get_regmap(rdev);
return regmap_update_bits(rmap, regl->suspend_enable_reg,
regl->suspend_enable_mask, 0);
}
static int pf8x00_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
struct pf8x00_regulator_data *regl = rdev_get_drvdata(rdev);
int ret;
if (regl->suspend_voltage_cache == uV)
return 0;
ret = regulator_map_voltage_iterate(rdev, uV, uV);
if (ret < 0) {
dev_err(rdev_get_dev(rdev), "failed to map %i uV\n", uV);
return ret;
}
dev_dbg(rdev_get_dev(rdev), "uV: %i, reg: 0x%x, msk: 0x%x, val: 0x%x\n",
uV, regl->suspend_voltage_reg, regl->desc.vsel_mask, ret);
ret = regmap_update_bits(rdev->regmap, regl->suspend_voltage_reg,
regl->desc.vsel_mask, ret);
if (ret < 0) {
dev_err(rdev_get_dev(rdev), "failed to set %i uV\n", uV);
return ret;
}
regl->suspend_voltage_cache = uV;
return 0;
}
static const struct regulator_ops pf8x00_ldo_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_table,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_suspend_enable = pf8x00_suspend_enable,
.set_suspend_disable = pf8x00_suspend_disable,
.set_suspend_voltage = pf8x00_set_suspend_voltage,
};
static const struct regulator_ops pf8x00_buck1_6_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.set_suspend_enable = pf8x00_suspend_enable,
.set_suspend_disable = pf8x00_suspend_disable,
.set_suspend_voltage = pf8x00_set_suspend_voltage,
};
static const struct regulator_ops pf8x00_buck7_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_ascend,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.set_suspend_enable = pf8x00_suspend_enable,
.set_suspend_disable = pf8x00_suspend_disable,
};
static const struct regulator_ops pf8x00_vsnvs_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_ascend,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
#define PF8X00LDO(_id, _name, base, voltages) \
[PF8X00_LDO ## _id] = { \
.desc = { \
.name = _name, \
.of_match = _name, \
.regulators_node = "regulators", \
.n_voltages = ARRAY_SIZE(voltages), \
.ops = &pf8x00_ldo_ops, \
.type = REGULATOR_VOLTAGE, \
.id = PF8X00_LDO ## _id, \
.owner = THIS_MODULE, \
.volt_table = voltages, \
.vsel_reg = (base) + LDO_RUN_VOLT, \
.vsel_mask = 0xff, \
.enable_reg = (base) + LDO_CONFIG2, \
.enable_val = 0x2, \
.disable_val = 0x0, \
.enable_mask = 2, \
}, \
.suspend_enable_reg = (base) + LDO_CONFIG2, \
.suspend_enable_mask = 1, \
.suspend_voltage_reg = (base) + LDO_STBY_VOLT, \
}
#define PF8X00BUCK(_id, _name, base, voltages) \
[PF8X00_BUCK ## _id] = { \
.desc = { \
.name = _name, \
.of_match = _name, \
.regulators_node = "regulators", \
.of_parse_cb = pf8x00_of_parse_cb, \
.n_voltages = PF8XOO_SW1_6_VOLTAGE_NUM, \
.ops = &pf8x00_buck1_6_ops, \
.type = REGULATOR_VOLTAGE, \
.id = PF8X00_BUCK ## _id, \
.owner = THIS_MODULE, \
.ramp_delay = 19000, \
.linear_ranges = pf8x00_sw1_to_6_voltages, \
.n_linear_ranges = \
ARRAY_SIZE(pf8x00_sw1_to_6_voltages), \
.vsel_reg = (base) + SW_RUN_VOLT, \
.vsel_mask = 0xff, \
.curr_table = pf8x00_sw_current_table, \
.n_current_limits = \
ARRAY_SIZE(pf8x00_sw_current_table), \
.csel_reg = (base) + SW_CONFIG2, \
.csel_mask = PF8X00_SWXILIM_MASK, \
.enable_reg = (base) + SW_MODE1, \
.enable_val = 0x3, \
.disable_val = 0x0, \
.enable_mask = 0x3, \
.enable_time = 500, \
}, \
.suspend_enable_reg = (base) + SW_MODE1, \
.suspend_enable_mask = 0xc, \
.suspend_voltage_reg = (base) + SW_STBY_VOLT, \
}
#define PF8X00BUCK7(_name, base, voltages) \
[PF8X00_BUCK7] = { \
.desc = { \
.name = _name, \
.of_match = _name, \
.regulators_node = "regulators", \
.of_parse_cb = pf8x00_of_parse_cb, \
.n_voltages = ARRAY_SIZE(voltages), \
.ops = &pf8x00_buck7_ops, \
.type = REGULATOR_VOLTAGE, \
.id = PF8X00_BUCK7, \
.owner = THIS_MODULE, \
.ramp_delay = 19000, \
.volt_table = voltages, \
.vsel_reg = (base) + SW_RUN_VOLT, \
.vsel_mask = 0xff, \
.curr_table = pf8x00_sw_current_table, \
.n_current_limits = \
ARRAY_SIZE(pf8x00_sw_current_table), \
.csel_reg = (base) + SW_CONFIG2, \
.csel_mask = PF8X00_SWXILIM_MASK, \
.enable_reg = (base) + SW_MODE1, \
.enable_val = 0x3, \
.disable_val = 0x0, \
.enable_mask = 0x3, \
.enable_time = 500, \
}, \
}
#define PF8X00VSNVS(_name, base, voltages) \
[PF8X00_VSNVS] = { \
.desc = { \
.name = _name, \
.of_match = _name, \
.regulators_node = "regulators", \
.n_voltages = ARRAY_SIZE(voltages), \
.ops = &pf8x00_vsnvs_ops, \
.type = REGULATOR_VOLTAGE, \
.id = PF8X00_VSNVS, \
.owner = THIS_MODULE, \
.volt_table = voltages, \
.vsel_reg = (base), \
.vsel_mask = 0x3, \
}, \
}
static struct pf8x00_regulator_data pf8x00_regs_data[PF8X00_MAX_REGULATORS] = {
PF8X00LDO(1, "ldo1", PF8X00_LDO_BASE(PF8X00_LDO1), pf8x00_ldo_voltages),
PF8X00LDO(2, "ldo2", PF8X00_LDO_BASE(PF8X00_LDO2), pf8x00_ldo_voltages),
PF8X00LDO(3, "ldo3", PF8X00_LDO_BASE(PF8X00_LDO3), pf8x00_ldo_voltages),
PF8X00LDO(4, "ldo4", PF8X00_LDO_BASE(PF8X00_LDO4), pf8x00_ldo_voltages),
PF8X00BUCK(1, "buck1", PF8X00_SW_BASE(PF8X00_BUCK1), pf8x00_sw1_to_6_voltages),
PF8X00BUCK(2, "buck2", PF8X00_SW_BASE(PF8X00_BUCK2), pf8x00_sw1_to_6_voltages),
PF8X00BUCK(3, "buck3", PF8X00_SW_BASE(PF8X00_BUCK3), pf8x00_sw1_to_6_voltages),
PF8X00BUCK(4, "buck4", PF8X00_SW_BASE(PF8X00_BUCK4), pf8x00_sw1_to_6_voltages),
PF8X00BUCK(5, "buck5", PF8X00_SW_BASE(PF8X00_BUCK5), pf8x00_sw1_to_6_voltages),
PF8X00BUCK(6, "buck6", PF8X00_SW_BASE(PF8X00_BUCK6), pf8x00_sw1_to_6_voltages),
PF8X00BUCK7("buck7", PF8X00_SW_BASE(PF8X00_BUCK7), pf8x00_sw7_voltages),
PF8X00VSNVS("vsnvs", PF8X00_VSNVS_CONFIG1, pf8x00_vsnvs_voltages),
};
static int pf8x00_identify(struct pf8x00_chip *chip)
{
unsigned int value;
u8 dev_fam, dev_id;
const char *name = NULL;
int ret;
ret = regmap_read(chip->regmap, PF8X00_DEVICEID, &value);
if (ret) {
dev_err(chip->dev, "failed to read chip family\n");
return ret;
}
dev_fam = value & PF8X00_DEVICE_FAM_MASK;
switch (dev_fam) {
case PF8X00_FAM:
break;
default:
dev_err(chip->dev,
"Chip 0x%x is not from PF8X00 family\n", dev_fam);
return ret;
}
dev_id = value & PF8X00_DEVICE_ID_MASK;
switch (dev_id) {
case PF8100:
name = "PF8100";
break;
case PF8121A:
name = "PF8121A";
break;
case PF8200:
name = "PF8200";
break;
default:
dev_err(chip->dev, "Unknown pf8x00 device id 0x%x\n", dev_id);
return -ENODEV;
}
dev_info(chip->dev, "%s PMIC found.\n", name);
return 0;
}
static int pf8x00_i2c_probe(struct i2c_client *client)
{
struct regulator_config config = { NULL, };
struct pf8x00_chip *chip;
int id;
int ret;
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
i2c_set_clientdata(client, chip);
chip->dev = &client->dev;
chip->regmap = devm_regmap_init_i2c(client, &pf8x00_regmap_config);
if (IS_ERR(chip->regmap)) {
ret = PTR_ERR(chip->regmap);
dev_err(&client->dev,
"regmap allocation failed with err %d\n", ret);
return ret;
}
ret = pf8x00_identify(chip);
if (ret)
return ret;
for (id = 0; id < ARRAY_SIZE(pf8x00_regs_data); id++) {
struct pf8x00_regulator_data *data = &pf8x00_regs_data[id];
struct regulator_dev *rdev;
config.dev = chip->dev;
config.driver_data = data;
config.regmap = chip->regmap;
rdev = devm_regulator_register(&client->dev, &data->desc, &config);
if (IS_ERR(rdev)) {
dev_err(&client->dev,
"failed to register %s regulator\n", data->desc.name);
return PTR_ERR(rdev);
}
}
return 0;
}
static const struct of_device_id pf8x00_dt_ids[] = {
{ .compatible = "nxp,pf8100",},
{ .compatible = "nxp,pf8121a",},
{ .compatible = "nxp,pf8200",},
{ }
};
MODULE_DEVICE_TABLE(of, pf8x00_dt_ids);
static const struct i2c_device_id pf8x00_i2c_id[] = {
{ "pf8100", 0 },
{ "pf8121a", 0 },
{ "pf8200", 0 },
{},
};
MODULE_DEVICE_TABLE(i2c, pf8x00_i2c_id);
static struct i2c_driver pf8x00_regulator_driver = {
.id_table = pf8x00_i2c_id,
.driver = {
.name = "pf8x00",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = pf8x00_dt_ids,
},
.probe = pf8x00_i2c_probe,
};
module_i2c_driver(pf8x00_regulator_driver);
MODULE_AUTHOR("Jagan Teki <jagan@amarulasolutions.com>");
MODULE_AUTHOR("Troy Kisky <troy.kisky@boundarydevices.com>");
MODULE_DESCRIPTION("Regulator Driver for NXP's PF8100/PF8121A/PF8200 PMIC");
MODULE_LICENSE("GPL v2"