diff options
Diffstat (limited to 'drivers/regulator/pca9450-regulator.c')
| -rw-r--r-- | drivers/regulator/pca9450-regulator.c | 885 |
1 files changed, 885 insertions, 0 deletions
diff --git a/drivers/regulator/pca9450-regulator.c b/drivers/regulator/pca9450-regulator.c new file mode 100644 index 000000000..0fcda40ce --- /dev/null +++ b/drivers/regulator/pca9450-regulator.c @@ -0,0 +1,885 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2020 NXP. + * NXP PCA9450 pmic driver + */ + +#include <linux/err.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/regulator/of_regulator.h> +#include <linux/regulator/pca9450.h> + +struct pc9450_dvs_config { + unsigned int run_reg; /* dvs0 */ + unsigned int run_mask; + unsigned int standby_reg; /* dvs1 */ + unsigned int standby_mask; +}; + +struct pca9450_regulator_desc { + struct regulator_desc desc; + const struct pc9450_dvs_config dvs; +}; + +struct pca9450 { + struct device *dev; + struct regmap *regmap; + struct gpio_desc *sd_vsel_gpio; + enum pca9450_chip_type type; + unsigned int rcnt; + int irq; +}; + +static const struct regmap_range pca9450_status_range = { + .range_min = PCA9450_REG_INT1, + .range_max = PCA9450_REG_PWRON_STAT, +}; + +static const struct regmap_access_table pca9450_volatile_regs = { + .yes_ranges = &pca9450_status_range, + .n_yes_ranges = 1, +}; + +static const struct regmap_config pca9450_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .volatile_table = &pca9450_volatile_regs, + .max_register = PCA9450_MAX_REGISTER - 1, + .cache_type = REGCACHE_RBTREE, +}; + +/* + * BUCK1/2/3 + * BUCK1RAM[1:0] BUCK1 DVS ramp rate setting + * 00: 25mV/1usec + * 01: 25mV/2usec + * 10: 25mV/4usec + * 11: 25mV/8usec + */ +static const unsigned int pca9450_dvs_buck_ramp_table[] = { + 25000, 12500, 6250, 3125 +}; + +static const struct regulator_ops pca9450_dvs_buck_regulator_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, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .set_ramp_delay = regulator_set_ramp_delay_regmap, +}; + +static const struct regulator_ops pca9450_buck_regulator_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, + .set_voltage_time_sel = regulator_set_voltage_time_sel, +}; + +static const struct regulator_ops pca9450_ldo_regulator_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, +}; + +/* + * BUCK1/2/3 + * 0.60 to 2.1875V (12.5mV step) + */ +static const struct linear_range pca9450_dvs_buck_volts[] = { + REGULATOR_LINEAR_RANGE(600000, 0x00, 0x7F, 12500), +}; + +/* + * BUCK4/5/6 + * 0.6V to 3.4V (25mV step) + */ +static const struct linear_range pca9450_buck_volts[] = { + REGULATOR_LINEAR_RANGE(600000, 0x00, 0x70, 25000), + REGULATOR_LINEAR_RANGE(3400000, 0x71, 0x7F, 0), +}; + +/* + * LDO1 + * 1.6 to 3.3V () + */ +static const struct linear_range pca9450_ldo1_volts[] = { + REGULATOR_LINEAR_RANGE(1600000, 0x00, 0x03, 100000), + REGULATOR_LINEAR_RANGE(3000000, 0x04, 0x07, 100000), +}; + +/* + * LDO2 + * 0.8 to 1.15V (50mV step) + */ +static const struct linear_range pca9450_ldo2_volts[] = { + REGULATOR_LINEAR_RANGE(800000, 0x00, 0x07, 50000), +}; + +/* + * LDO3/4 + * 0.8 to 3.3V (100mV step) + */ +static const struct linear_range pca9450_ldo34_volts[] = { + REGULATOR_LINEAR_RANGE(800000, 0x00, 0x19, 100000), + REGULATOR_LINEAR_RANGE(3300000, 0x1A, 0x1F, 0), +}; + +/* + * LDO5 + * 1.8 to 3.3V (100mV step) + */ +static const struct linear_range pca9450_ldo5_volts[] = { + REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000), +}; + +static int buck_set_dvs(const struct regulator_desc *desc, + struct device_node *np, struct regmap *regmap, + char *prop, unsigned int reg, unsigned int mask) +{ + int ret, i; + uint32_t uv; + + ret = of_property_read_u32(np, prop, &uv); + if (ret == -EINVAL) + return 0; + else if (ret) + return ret; + + for (i = 0; i < desc->n_voltages; i++) { + ret = regulator_desc_list_voltage_linear_range(desc, i); + if (ret < 0) + continue; + if (ret == uv) { + i <<= ffs(desc->vsel_mask) - 1; + ret = regmap_update_bits(regmap, reg, mask, i); + break; + } + } + + if (ret == 0) { + struct pca9450_regulator_desc *regulator = container_of(desc, + struct pca9450_regulator_desc, desc); + + /* Enable DVS control through PMIC_STBY_REQ for this BUCK */ + ret = regmap_update_bits(regmap, regulator->desc.enable_reg, + BUCK1_DVS_CTRL, BUCK1_DVS_CTRL); + } + return ret; +} + +static int pca9450_set_dvs_levels(struct device_node *np, + const struct regulator_desc *desc, + struct regulator_config *cfg) +{ + struct pca9450_regulator_desc *data = container_of(desc, + struct pca9450_regulator_desc, desc); + const struct pc9450_dvs_config *dvs = &data->dvs; + unsigned int reg, mask; + char *prop; + int i, ret = 0; + + for (i = 0; i < PCA9450_DVS_LEVEL_MAX; i++) { + switch (i) { + case PCA9450_DVS_LEVEL_RUN: + prop = "nxp,dvs-run-voltage"; + reg = dvs->run_reg; + mask = dvs->run_mask; + break; + case PCA9450_DVS_LEVEL_STANDBY: + prop = "nxp,dvs-standby-voltage"; + reg = dvs->standby_reg; + mask = dvs->standby_mask; + break; + default: + return -EINVAL; + } + + ret = buck_set_dvs(desc, np, cfg->regmap, prop, reg, mask); + if (ret) + break; + } + + return ret; +} + +static const struct pca9450_regulator_desc pca9450a_regulators[] = { + { + .desc = { + .name = "buck1", + .of_match = of_match_ptr("BUCK1"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_BUCK1, + .ops = &pca9450_dvs_buck_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_BUCK1_VOLTAGE_NUM, + .linear_ranges = pca9450_dvs_buck_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts), + .vsel_reg = PCA9450_REG_BUCK1OUT_DVS0, + .vsel_mask = BUCK1OUT_DVS0_MASK, + .enable_reg = PCA9450_REG_BUCK1CTRL, + .enable_mask = BUCK1_ENMODE_MASK, + .ramp_reg = PCA9450_REG_BUCK1CTRL, + .ramp_mask = BUCK1_RAMP_MASK, + .ramp_delay_table = pca9450_dvs_buck_ramp_table, + .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table), + .owner = THIS_MODULE, + .of_parse_cb = pca9450_set_dvs_levels, + }, + .dvs = { + .run_reg = PCA9450_REG_BUCK1OUT_DVS0, + .run_mask = BUCK1OUT_DVS0_MASK, + .standby_reg = PCA9450_REG_BUCK1OUT_DVS1, + .standby_mask = BUCK1OUT_DVS1_MASK, + }, + }, + { + .desc = { + .name = "buck2", + .of_match = of_match_ptr("BUCK2"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_BUCK2, + .ops = &pca9450_dvs_buck_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_BUCK2_VOLTAGE_NUM, + .linear_ranges = pca9450_dvs_buck_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts), + .vsel_reg = PCA9450_REG_BUCK2OUT_DVS0, + .vsel_mask = BUCK2OUT_DVS0_MASK, + .enable_reg = PCA9450_REG_BUCK2CTRL, + .enable_mask = BUCK2_ENMODE_MASK, + .ramp_reg = PCA9450_REG_BUCK2CTRL, + .ramp_mask = BUCK2_RAMP_MASK, + .ramp_delay_table = pca9450_dvs_buck_ramp_table, + .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table), + .owner = THIS_MODULE, + .of_parse_cb = pca9450_set_dvs_levels, + }, + .dvs = { + .run_reg = PCA9450_REG_BUCK2OUT_DVS0, + .run_mask = BUCK2OUT_DVS0_MASK, + .standby_reg = PCA9450_REG_BUCK2OUT_DVS1, + .standby_mask = BUCK2OUT_DVS1_MASK, + }, + }, + { + .desc = { + .name = "buck3", + .of_match = of_match_ptr("BUCK3"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_BUCK3, + .ops = &pca9450_dvs_buck_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_BUCK3_VOLTAGE_NUM, + .linear_ranges = pca9450_dvs_buck_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts), + .vsel_reg = PCA9450_REG_BUCK3OUT_DVS0, + .vsel_mask = BUCK3OUT_DVS0_MASK, + .enable_reg = PCA9450_REG_BUCK3CTRL, + .enable_mask = BUCK3_ENMODE_MASK, + .ramp_reg = PCA9450_REG_BUCK3CTRL, + .ramp_mask = BUCK3_RAMP_MASK, + .ramp_delay_table = pca9450_dvs_buck_ramp_table, + .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table), + .owner = THIS_MODULE, + .of_parse_cb = pca9450_set_dvs_levels, + }, + .dvs = { + .run_reg = PCA9450_REG_BUCK3OUT_DVS0, + .run_mask = BUCK3OUT_DVS0_MASK, + .standby_reg = PCA9450_REG_BUCK3OUT_DVS1, + .standby_mask = BUCK3OUT_DVS1_MASK, + }, + }, + { + .desc = { + .name = "buck4", + .of_match = of_match_ptr("BUCK4"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_BUCK4, + .ops = &pca9450_buck_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_BUCK4_VOLTAGE_NUM, + .linear_ranges = pca9450_buck_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts), + .vsel_reg = PCA9450_REG_BUCK4OUT, + .vsel_mask = BUCK4OUT_MASK, + .enable_reg = PCA9450_REG_BUCK4CTRL, + .enable_mask = BUCK4_ENMODE_MASK, + .owner = THIS_MODULE, + }, + }, + { + .desc = { + .name = "buck5", + .of_match = of_match_ptr("BUCK5"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_BUCK5, + .ops = &pca9450_buck_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_BUCK5_VOLTAGE_NUM, + .linear_ranges = pca9450_buck_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts), + .vsel_reg = PCA9450_REG_BUCK5OUT, + .vsel_mask = BUCK5OUT_MASK, + .enable_reg = PCA9450_REG_BUCK5CTRL, + .enable_mask = BUCK5_ENMODE_MASK, + .owner = THIS_MODULE, + }, + }, + { + .desc = { + .name = "buck6", + .of_match = of_match_ptr("BUCK6"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_BUCK6, + .ops = &pca9450_buck_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_BUCK6_VOLTAGE_NUM, + .linear_ranges = pca9450_buck_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts), + .vsel_reg = PCA9450_REG_BUCK6OUT, + .vsel_mask = BUCK6OUT_MASK, + .enable_reg = PCA9450_REG_BUCK6CTRL, + .enable_mask = BUCK6_ENMODE_MASK, + .owner = THIS_MODULE, + }, + }, + { + .desc = { + .name = "ldo1", + .of_match = of_match_ptr("LDO1"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_LDO1, + .ops = &pca9450_ldo_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_LDO1_VOLTAGE_NUM, + .linear_ranges = pca9450_ldo1_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts), + .vsel_reg = PCA9450_REG_LDO1CTRL, + .vsel_mask = LDO1OUT_MASK, + .enable_reg = PCA9450_REG_LDO1CTRL, + .enable_mask = LDO1_EN_MASK, + .owner = THIS_MODULE, + }, + }, + { + .desc = { + .name = "ldo2", + .of_match = of_match_ptr("LDO2"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_LDO2, + .ops = &pca9450_ldo_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_LDO2_VOLTAGE_NUM, + .linear_ranges = pca9450_ldo2_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts), + .vsel_reg = PCA9450_REG_LDO2CTRL, + .vsel_mask = LDO2OUT_MASK, + .enable_reg = PCA9450_REG_LDO2CTRL, + .enable_mask = LDO2_EN_MASK, + .owner = THIS_MODULE, + }, + }, + { + .desc = { + .name = "ldo3", + .of_match = of_match_ptr("LDO3"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_LDO3, + .ops = &pca9450_ldo_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_LDO3_VOLTAGE_NUM, + .linear_ranges = pca9450_ldo34_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts), + .vsel_reg = PCA9450_REG_LDO3CTRL, + .vsel_mask = LDO3OUT_MASK, + .enable_reg = PCA9450_REG_LDO3CTRL, + .enable_mask = LDO3_EN_MASK, + .owner = THIS_MODULE, + }, + }, + { + .desc = { + .name = "ldo4", + .of_match = of_match_ptr("LDO4"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_LDO4, + .ops = &pca9450_ldo_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_LDO4_VOLTAGE_NUM, + .linear_ranges = pca9450_ldo34_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts), + .vsel_reg = PCA9450_REG_LDO4CTRL, + .vsel_mask = LDO4OUT_MASK, + .enable_reg = PCA9450_REG_LDO4CTRL, + .enable_mask = LDO4_EN_MASK, + .owner = THIS_MODULE, + }, + }, + { + .desc = { + .name = "ldo5", + .of_match = of_match_ptr("LDO5"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_LDO5, + .ops = &pca9450_ldo_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_LDO5_VOLTAGE_NUM, + .linear_ranges = pca9450_ldo5_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts), + .vsel_reg = PCA9450_REG_LDO5CTRL_H, + .vsel_mask = LDO5HOUT_MASK, + .enable_reg = PCA9450_REG_LDO5CTRL_H, + .enable_mask = LDO5H_EN_MASK, + .owner = THIS_MODULE, + }, + }, +}; + +/* + * Buck3 removed on PCA9450B and connected with Buck1 internal for dual phase + * on PCA9450C as no Buck3. + */ +static const struct pca9450_regulator_desc pca9450bc_regulators[] = { + { + .desc = { + .name = "buck1", + .of_match = of_match_ptr("BUCK1"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_BUCK1, + .ops = &pca9450_dvs_buck_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_BUCK1_VOLTAGE_NUM, + .linear_ranges = pca9450_dvs_buck_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts), + .vsel_reg = PCA9450_REG_BUCK1OUT_DVS0, + .vsel_mask = BUCK1OUT_DVS0_MASK, + .enable_reg = PCA9450_REG_BUCK1CTRL, + .enable_mask = BUCK1_ENMODE_MASK, + .ramp_reg = PCA9450_REG_BUCK1CTRL, + .ramp_mask = BUCK1_RAMP_MASK, + .ramp_delay_table = pca9450_dvs_buck_ramp_table, + .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table), + .owner = THIS_MODULE, + .of_parse_cb = pca9450_set_dvs_levels, + }, + .dvs = { + .run_reg = PCA9450_REG_BUCK1OUT_DVS0, + .run_mask = BUCK1OUT_DVS0_MASK, + .standby_reg = PCA9450_REG_BUCK1OUT_DVS1, + .standby_mask = BUCK1OUT_DVS1_MASK, + }, + }, + { + .desc = { + .name = "buck2", + .of_match = of_match_ptr("BUCK2"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_BUCK2, + .ops = &pca9450_dvs_buck_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_BUCK2_VOLTAGE_NUM, + .linear_ranges = pca9450_dvs_buck_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts), + .vsel_reg = PCA9450_REG_BUCK2OUT_DVS0, + .vsel_mask = BUCK2OUT_DVS0_MASK, + .enable_reg = PCA9450_REG_BUCK2CTRL, + .enable_mask = BUCK2_ENMODE_MASK, + .ramp_reg = PCA9450_REG_BUCK2CTRL, + .ramp_mask = BUCK2_RAMP_MASK, + .ramp_delay_table = pca9450_dvs_buck_ramp_table, + .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table), + .owner = THIS_MODULE, + .of_parse_cb = pca9450_set_dvs_levels, + }, + .dvs = { + .run_reg = PCA9450_REG_BUCK2OUT_DVS0, + .run_mask = BUCK2OUT_DVS0_MASK, + .standby_reg = PCA9450_REG_BUCK2OUT_DVS1, + .standby_mask = BUCK2OUT_DVS1_MASK, + }, + }, + { + .desc = { + .name = "buck4", + .of_match = of_match_ptr("BUCK4"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_BUCK4, + .ops = &pca9450_buck_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_BUCK4_VOLTAGE_NUM, + .linear_ranges = pca9450_buck_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts), + .vsel_reg = PCA9450_REG_BUCK4OUT, + .vsel_mask = BUCK4OUT_MASK, + .enable_reg = PCA9450_REG_BUCK4CTRL, + .enable_mask = BUCK4_ENMODE_MASK, + .owner = THIS_MODULE, + }, + }, + { + .desc = { + .name = "buck5", + .of_match = of_match_ptr("BUCK5"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_BUCK5, + .ops = &pca9450_buck_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_BUCK5_VOLTAGE_NUM, + .linear_ranges = pca9450_buck_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts), + .vsel_reg = PCA9450_REG_BUCK5OUT, + .vsel_mask = BUCK5OUT_MASK, + .enable_reg = PCA9450_REG_BUCK5CTRL, + .enable_mask = BUCK5_ENMODE_MASK, + .owner = THIS_MODULE, + }, + }, + { + .desc = { + .name = "buck6", + .of_match = of_match_ptr("BUCK6"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_BUCK6, + .ops = &pca9450_buck_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_BUCK6_VOLTAGE_NUM, + .linear_ranges = pca9450_buck_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts), + .vsel_reg = PCA9450_REG_BUCK6OUT, + .vsel_mask = BUCK6OUT_MASK, + .enable_reg = PCA9450_REG_BUCK6CTRL, + .enable_mask = BUCK6_ENMODE_MASK, + .owner = THIS_MODULE, + }, + }, + { + .desc = { + .name = "ldo1", + .of_match = of_match_ptr("LDO1"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_LDO1, + .ops = &pca9450_ldo_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_LDO1_VOLTAGE_NUM, + .linear_ranges = pca9450_ldo1_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts), + .vsel_reg = PCA9450_REG_LDO1CTRL, + .vsel_mask = LDO1OUT_MASK, + .enable_reg = PCA9450_REG_LDO1CTRL, + .enable_mask = LDO1_EN_MASK, + .owner = THIS_MODULE, + }, + }, + { + .desc = { + .name = "ldo2", + .of_match = of_match_ptr("LDO2"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_LDO2, + .ops = &pca9450_ldo_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_LDO2_VOLTAGE_NUM, + .linear_ranges = pca9450_ldo2_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts), + .vsel_reg = PCA9450_REG_LDO2CTRL, + .vsel_mask = LDO2OUT_MASK, + .enable_reg = PCA9450_REG_LDO2CTRL, + .enable_mask = LDO2_EN_MASK, + .owner = THIS_MODULE, + }, + }, + { + .desc = { + .name = "ldo3", + .of_match = of_match_ptr("LDO3"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_LDO3, + .ops = &pca9450_ldo_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_LDO3_VOLTAGE_NUM, + .linear_ranges = pca9450_ldo34_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts), + .vsel_reg = PCA9450_REG_LDO3CTRL, + .vsel_mask = LDO3OUT_MASK, + .enable_reg = PCA9450_REG_LDO3CTRL, + .enable_mask = LDO3_EN_MASK, + .owner = THIS_MODULE, + }, + }, + { + .desc = { + .name = "ldo4", + .of_match = of_match_ptr("LDO4"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_LDO4, + .ops = &pca9450_ldo_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_LDO4_VOLTAGE_NUM, + .linear_ranges = pca9450_ldo34_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts), + .vsel_reg = PCA9450_REG_LDO4CTRL, + .vsel_mask = LDO4OUT_MASK, + .enable_reg = PCA9450_REG_LDO4CTRL, + .enable_mask = LDO4_EN_MASK, + .owner = THIS_MODULE, + }, + }, + { + .desc = { + .name = "ldo5", + .of_match = of_match_ptr("LDO5"), + .regulators_node = of_match_ptr("regulators"), + .id = PCA9450_LDO5, + .ops = &pca9450_ldo_regulator_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = PCA9450_LDO5_VOLTAGE_NUM, + .linear_ranges = pca9450_ldo5_volts, + .n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts), + .vsel_reg = PCA9450_REG_LDO5CTRL_H, + .vsel_mask = LDO5HOUT_MASK, + .enable_reg = PCA9450_REG_LDO5CTRL_H, + .enable_mask = LDO5H_EN_MASK, + .owner = THIS_MODULE, + }, + }, +}; + +static irqreturn_t pca9450_irq_handler(int irq, void *data) +{ + struct pca9450 *pca9450 = data; + struct regmap *regmap = pca9450->regmap; + unsigned int status; + int ret; + + ret = regmap_read(regmap, PCA9450_REG_INT1, &status); + if (ret < 0) { + dev_err(pca9450->dev, + "Failed to read INT1(%d)\n", ret); + return IRQ_NONE; + } + + if (status & IRQ_PWRON) + dev_warn(pca9450->dev, "PWRON interrupt.\n"); + + if (status & IRQ_WDOGB) + dev_warn(pca9450->dev, "WDOGB interrupt.\n"); + + if (status & IRQ_VR_FLT1) + dev_warn(pca9450->dev, "VRFLT1 interrupt.\n"); + + if (status & IRQ_VR_FLT2) + dev_warn(pca9450->dev, "VRFLT2 interrupt.\n"); + + if (status & IRQ_LOWVSYS) + dev_warn(pca9450->dev, "LOWVSYS interrupt.\n"); + + if (status & IRQ_THERM_105) + dev_warn(pca9450->dev, "IRQ_THERM_105 interrupt.\n"); + + if (status & IRQ_THERM_125) + dev_warn(pca9450->dev, "IRQ_THERM_125 interrupt.\n"); + + return IRQ_HANDLED; +} + +static int pca9450_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + enum pca9450_chip_type type = (unsigned int)(uintptr_t) + of_device_get_match_data(&i2c->dev); + const struct pca9450_regulator_desc *regulator_desc; + struct regulator_config config = { }; + struct pca9450 *pca9450; + unsigned int device_id, i; + unsigned int reset_ctrl; + int ret; + + if (!i2c->irq) { + dev_err(&i2c->dev, "No IRQ configured?\n"); + return -EINVAL; + } + + pca9450 = devm_kzalloc(&i2c->dev, sizeof(struct pca9450), GFP_KERNEL); + if (!pca9450) + return -ENOMEM; + + switch (type) { + case PCA9450_TYPE_PCA9450A: + regulator_desc = pca9450a_regulators; + pca9450->rcnt = ARRAY_SIZE(pca9450a_regulators); + break; + case PCA9450_TYPE_PCA9450BC: + regulator_desc = pca9450bc_regulators; + pca9450->rcnt = ARRAY_SIZE(pca9450bc_regulators); + break; + default: + dev_err(&i2c->dev, "Unknown device type"); + return -EINVAL; + } + + pca9450->irq = i2c->irq; + pca9450->type = type; + pca9450->dev = &i2c->dev; + + dev_set_drvdata(&i2c->dev, pca9450); + + pca9450->regmap = devm_regmap_init_i2c(i2c, + &pca9450_regmap_config); + if (IS_ERR(pca9450->regmap)) { + dev_err(&i2c->dev, "regmap initialization failed\n"); + return PTR_ERR(pca9450->regmap); + } + + ret = regmap_read(pca9450->regmap, PCA9450_REG_DEV_ID, &device_id); + if (ret) { + dev_err(&i2c->dev, "Read device id error\n"); + return ret; + } + + /* Check your board and dts for match the right pmic */ + if (((device_id >> 4) != 0x1 && type == PCA9450_TYPE_PCA9450A) || + ((device_id >> 4) != 0x3 && type == PCA9450_TYPE_PCA9450BC)) { + dev_err(&i2c->dev, "Device id(%x) mismatched\n", + device_id >> 4); + return -EINVAL; + } + + for (i = 0; i < pca9450->rcnt; i++) { + const struct regulator_desc *desc; + struct regulator_dev *rdev; + const struct pca9450_regulator_desc *r; + + r = ®ulator_desc[i]; + desc = &r->desc; + + config.regmap = pca9450->regmap; + config.dev = pca9450->dev; + + rdev = devm_regulator_register(pca9450->dev, desc, &config); + if (IS_ERR(rdev)) { + ret = PTR_ERR(rdev); + dev_err(pca9450->dev, + "Failed to register regulator(%s): %d\n", + desc->name, ret); + return ret; + } + } + + ret = devm_request_threaded_irq(pca9450->dev, pca9450->irq, NULL, + pca9450_irq_handler, + (IRQF_TRIGGER_FALLING | IRQF_ONESHOT), + "pca9450-irq", pca9450); + if (ret != 0) { + dev_err(pca9450->dev, "Failed to request IRQ: %d\n", + pca9450->irq); + return ret; + } + /* Unmask all interrupt except PWRON/WDOG/RSVD */ + ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_INT1_MSK, + IRQ_VR_FLT1 | IRQ_VR_FLT2 | IRQ_LOWVSYS | + IRQ_THERM_105 | IRQ_THERM_125, + IRQ_PWRON | IRQ_WDOGB | IRQ_RSVD); + if (ret) { + dev_err(&i2c->dev, "Unmask irq error\n"); + return ret; + } + + /* Clear PRESET_EN bit in BUCK123_DVS to use DVS registers */ + ret = regmap_clear_bits(pca9450->regmap, PCA9450_REG_BUCK123_DVS, + BUCK123_PRESET_EN); + if (ret) { + dev_err(&i2c->dev, "Failed to clear PRESET_EN bit: %d\n", ret); + return ret; + } + + if (of_property_read_bool(i2c->dev.of_node, "nxp,wdog_b-warm-reset")) + reset_ctrl = WDOG_B_CFG_WARM; + else + reset_ctrl = WDOG_B_CFG_COLD_LDO12; + + /* Set reset behavior on assertion of WDOG_B signal */ + ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_RESET_CTRL, + WDOG_B_CFG_MASK, reset_ctrl); + if (ret) { + dev_err(&i2c->dev, "Failed to set WDOG_B reset behavior\n"); + return ret; + } + + if (of_property_read_bool(i2c->dev.of_node, "nxp,i2c-lt-enable")) { + /* Enable I2C Level Translator */ + ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_CONFIG2, + I2C_LT_MASK, I2C_LT_ON_STANDBY_RUN); + if (ret) { + dev_err(&i2c->dev, + "Failed to enable I2C level translator\n"); + return ret; + } + } + + /* + * The driver uses the LDO5CTRL_H register to control the LDO5 regulator. + * This is only valid if the SD_VSEL input of the PMIC is high. Let's + * check if the pin is available as GPIO and set it to high. + */ + pca9450->sd_vsel_gpio = gpiod_get_optional(pca9450->dev, "sd-vsel", GPIOD_OUT_HIGH); + + if (IS_ERR(pca9450->sd_vsel_gpio)) { + dev_err(&i2c->dev, "Failed to get SD_VSEL GPIO\n"); + return PTR_ERR(pca9450->sd_vsel_gpio); + } + + dev_info(&i2c->dev, "%s probed.\n", + type == PCA9450_TYPE_PCA9450A ? "pca9450a" : "pca9450bc"); + + return 0; +} + +static const struct of_device_id pca9450_of_match[] = { + { + .compatible = "nxp,pca9450a", + .data = (void *)PCA9450_TYPE_PCA9450A, + }, + { + .compatible = "nxp,pca9450b", + .data = (void *)PCA9450_TYPE_PCA9450BC, + }, + { + .compatible = "nxp,pca9450c", + .data = (void *)PCA9450_TYPE_PCA9450BC, + }, + { } +}; +MODULE_DEVICE_TABLE(of, pca9450_of_match); + +static struct i2c_driver pca9450_i2c_driver = { + .driver = { + .name = "nxp-pca9450", + .of_match_table = pca9450_of_match, + }, + .probe = pca9450_i2c_probe, +}; + +module_i2c_driver(pca9450_i2c_driver); + +MODULE_AUTHOR("Robin Gong <yibin.gong@nxp.com>"); +MODULE_DESCRIPTION("NXP PCA9450 Power Management IC driver"); +MODULE_LICENSE("GPL"); |