| // SPDX-License-Identifier: GPL-2.0+ |
| // |
| // SLG51000 High PSRR, Multi-Output Regulators |
| // Copyright (C) 2019 Dialog Semiconductor |
| // |
| // Author: Eric Jeong <eric.jeong.opensource@diasemi.com> |
| |
| #include <linux/err.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/i2c.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/irq.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/regmap.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/machine.h> |
| #include <linux/regulator/of_regulator.h> |
| #include "slg51000-regulator.h" |
| |
| #define SLG51000_SCTL_EVT 7 |
| #define SLG51000_MAX_EVT_REGISTER 8 |
| #define SLG51000_LDOHP_LV_MIN 1200000 |
| #define SLG51000_LDOHP_HV_MIN 2400000 |
| |
| enum slg51000_regulators { |
| SLG51000_REGULATOR_LDO1 = 0, |
| SLG51000_REGULATOR_LDO2, |
| SLG51000_REGULATOR_LDO3, |
| SLG51000_REGULATOR_LDO4, |
| SLG51000_REGULATOR_LDO5, |
| SLG51000_REGULATOR_LDO6, |
| SLG51000_REGULATOR_LDO7, |
| SLG51000_MAX_REGULATORS, |
| }; |
| |
| struct slg51000 { |
| struct device *dev; |
| struct regmap *regmap; |
| struct regulator_desc *rdesc[SLG51000_MAX_REGULATORS]; |
| struct regulator_dev *rdev[SLG51000_MAX_REGULATORS]; |
| struct gpio_desc *cs_gpiod; |
| int chip_irq; |
| }; |
| |
| struct slg51000_evt_sta { |
| unsigned int ereg; |
| unsigned int sreg; |
| }; |
| |
| static const struct slg51000_evt_sta es_reg[SLG51000_MAX_EVT_REGISTER] = { |
| {SLG51000_LDO1_EVENT, SLG51000_LDO1_STATUS}, |
| {SLG51000_LDO2_EVENT, SLG51000_LDO2_STATUS}, |
| {SLG51000_LDO3_EVENT, SLG51000_LDO3_STATUS}, |
| {SLG51000_LDO4_EVENT, SLG51000_LDO4_STATUS}, |
| {SLG51000_LDO5_EVENT, SLG51000_LDO5_STATUS}, |
| {SLG51000_LDO6_EVENT, SLG51000_LDO6_STATUS}, |
| {SLG51000_LDO7_EVENT, SLG51000_LDO7_STATUS}, |
| {SLG51000_SYSCTL_EVENT, SLG51000_SYSCTL_STATUS}, |
| }; |
| |
| static const struct regmap_range slg51000_writeable_ranges[] = { |
| regmap_reg_range(SLG51000_SYSCTL_MATRIX_CONF_A, |
| SLG51000_SYSCTL_MATRIX_CONF_A), |
| regmap_reg_range(SLG51000_LDO1_VSEL, SLG51000_LDO1_VSEL), |
| regmap_reg_range(SLG51000_LDO1_MINV, SLG51000_LDO1_MAXV), |
| regmap_reg_range(SLG51000_LDO1_IRQ_MASK, SLG51000_LDO1_IRQ_MASK), |
| regmap_reg_range(SLG51000_LDO2_VSEL, SLG51000_LDO2_VSEL), |
| regmap_reg_range(SLG51000_LDO2_MINV, SLG51000_LDO2_MAXV), |
| regmap_reg_range(SLG51000_LDO2_IRQ_MASK, SLG51000_LDO2_IRQ_MASK), |
| regmap_reg_range(SLG51000_LDO3_VSEL, SLG51000_LDO3_VSEL), |
| regmap_reg_range(SLG51000_LDO3_MINV, SLG51000_LDO3_MAXV), |
| regmap_reg_range(SLG51000_LDO3_IRQ_MASK, SLG51000_LDO3_IRQ_MASK), |
| regmap_reg_range(SLG51000_LDO4_VSEL, SLG51000_LDO4_VSEL), |
| regmap_reg_range(SLG51000_LDO4_MINV, SLG51000_LDO4_MAXV), |
| regmap_reg_range(SLG51000_LDO4_IRQ_MASK, SLG51000_LDO4_IRQ_MASK), |
| regmap_reg_range(SLG51000_LDO5_VSEL, SLG51000_LDO5_VSEL), |
| regmap_reg_range(SLG51000_LDO5_MINV, SLG51000_LDO5_MAXV), |
| regmap_reg_range(SLG51000_LDO5_IRQ_MASK, SLG51000_LDO5_IRQ_MASK), |
| regmap_reg_range(SLG51000_LDO6_VSEL, SLG51000_LDO6_VSEL), |
| regmap_reg_range(SLG51000_LDO6_MINV, SLG51000_LDO6_MAXV), |
| regmap_reg_range(SLG51000_LDO6_IRQ_MASK, SLG51000_LDO6_IRQ_MASK), |
| regmap_reg_range(SLG51000_LDO7_VSEL, SLG51000_LDO7_VSEL), |
| regmap_reg_range(SLG51000_LDO7_MINV, SLG51000_LDO7_MAXV), |
| regmap_reg_range(SLG51000_LDO7_IRQ_MASK, SLG51000_LDO7_IRQ_MASK), |
| regmap_reg_range(SLG51000_OTP_IRQ_MASK, SLG51000_OTP_IRQ_MASK), |
| }; |
| |
| static const struct regmap_range slg51000_readable_ranges[] = { |
| regmap_reg_range(SLG51000_SYSCTL_PATN_ID_B0, |
| SLG51000_SYSCTL_PATN_ID_B2), |
| regmap_reg_range(SLG51000_SYSCTL_SYS_CONF_A, |
| SLG51000_SYSCTL_SYS_CONF_A), |
| regmap_reg_range(SLG51000_SYSCTL_SYS_CONF_D, |
| SLG51000_SYSCTL_MATRIX_CONF_B), |
| regmap_reg_range(SLG51000_SYSCTL_REFGEN_CONF_C, |
| SLG51000_SYSCTL_UVLO_CONF_A), |
| regmap_reg_range(SLG51000_SYSCTL_FAULT_LOG1, SLG51000_SYSCTL_IRQ_MASK), |
| regmap_reg_range(SLG51000_IO_GPIO1_CONF, SLG51000_IO_GPIO_STATUS), |
| regmap_reg_range(SLG51000_LUTARRAY_LUT_VAL_0, |
| SLG51000_LUTARRAY_LUT_VAL_11), |
| regmap_reg_range(SLG51000_MUXARRAY_INPUT_SEL_0, |
| SLG51000_MUXARRAY_INPUT_SEL_63), |
| regmap_reg_range(SLG51000_PWRSEQ_RESOURCE_EN_0, |
| SLG51000_PWRSEQ_INPUT_SENSE_CONF_B), |
| regmap_reg_range(SLG51000_LDO1_VSEL, SLG51000_LDO1_VSEL), |
| regmap_reg_range(SLG51000_LDO1_MINV, SLG51000_LDO1_MAXV), |
| regmap_reg_range(SLG51000_LDO1_MISC1, SLG51000_LDO1_VSEL_ACTUAL), |
| regmap_reg_range(SLG51000_LDO1_EVENT, SLG51000_LDO1_IRQ_MASK), |
| regmap_reg_range(SLG51000_LDO2_VSEL, SLG51000_LDO2_VSEL), |
| regmap_reg_range(SLG51000_LDO2_MINV, SLG51000_LDO2_MAXV), |
| regmap_reg_range(SLG51000_LDO2_MISC1, SLG51000_LDO2_VSEL_ACTUAL), |
| regmap_reg_range(SLG51000_LDO2_EVENT, SLG51000_LDO2_IRQ_MASK), |
| regmap_reg_range(SLG51000_LDO3_VSEL, SLG51000_LDO3_VSEL), |
| regmap_reg_range(SLG51000_LDO3_MINV, SLG51000_LDO3_MAXV), |
| regmap_reg_range(SLG51000_LDO3_CONF1, SLG51000_LDO3_VSEL_ACTUAL), |
| regmap_reg_range(SLG51000_LDO3_EVENT, SLG51000_LDO3_IRQ_MASK), |
| regmap_reg_range(SLG51000_LDO4_VSEL, SLG51000_LDO4_VSEL), |
| regmap_reg_range(SLG51000_LDO4_MINV, SLG51000_LDO4_MAXV), |
| regmap_reg_range(SLG51000_LDO4_CONF1, SLG51000_LDO4_VSEL_ACTUAL), |
| regmap_reg_range(SLG51000_LDO4_EVENT, SLG51000_LDO4_IRQ_MASK), |
| regmap_reg_range(SLG51000_LDO5_VSEL, SLG51000_LDO5_VSEL), |
| regmap_reg_range(SLG51000_LDO5_MINV, SLG51000_LDO5_MAXV), |
| regmap_reg_range(SLG51000_LDO5_TRIM2, SLG51000_LDO5_TRIM2), |
| regmap_reg_range(SLG51000_LDO5_CONF1, SLG51000_LDO5_VSEL_ACTUAL), |
| regmap_reg_range(SLG51000_LDO5_EVENT, SLG51000_LDO5_IRQ_MASK), |
| regmap_reg_range(SLG51000_LDO6_VSEL, SLG51000_LDO6_VSEL), |
| regmap_reg_range(SLG51000_LDO6_MINV, SLG51000_LDO6_MAXV), |
| regmap_reg_range(SLG51000_LDO6_TRIM2, SLG51000_LDO6_TRIM2), |
| regmap_reg_range(SLG51000_LDO6_CONF1, SLG51000_LDO6_VSEL_ACTUAL), |
| regmap_reg_range(SLG51000_LDO6_EVENT, SLG51000_LDO6_IRQ_MASK), |
| regmap_reg_range(SLG51000_LDO7_VSEL, SLG51000_LDO7_VSEL), |
| regmap_reg_range(SLG51000_LDO7_MINV, SLG51000_LDO7_MAXV), |
| regmap_reg_range(SLG51000_LDO7_CONF1, SLG51000_LDO7_VSEL_ACTUAL), |
| regmap_reg_range(SLG51000_LDO7_EVENT, SLG51000_LDO7_IRQ_MASK), |
| regmap_reg_range(SLG51000_OTP_EVENT, SLG51000_OTP_EVENT), |
| regmap_reg_range(SLG51000_OTP_IRQ_MASK, SLG51000_OTP_IRQ_MASK), |
| regmap_reg_range(SLG51000_OTP_LOCK_OTP_PROG, SLG51000_OTP_LOCK_CTRL), |
| regmap_reg_range(SLG51000_LOCK_GLOBAL_LOCK_CTRL1, |
| SLG51000_LOCK_GLOBAL_LOCK_CTRL1), |
| }; |
| |
| static const struct regmap_range slg51000_volatile_ranges[] = { |
| regmap_reg_range(SLG51000_SYSCTL_FAULT_LOG1, SLG51000_SYSCTL_STATUS), |
| regmap_reg_range(SLG51000_IO_GPIO_STATUS, SLG51000_IO_GPIO_STATUS), |
| regmap_reg_range(SLG51000_LDO1_EVENT, SLG51000_LDO1_STATUS), |
| regmap_reg_range(SLG51000_LDO2_EVENT, SLG51000_LDO2_STATUS), |
| regmap_reg_range(SLG51000_LDO3_EVENT, SLG51000_LDO3_STATUS), |
| regmap_reg_range(SLG51000_LDO4_EVENT, SLG51000_LDO4_STATUS), |
| regmap_reg_range(SLG51000_LDO5_EVENT, SLG51000_LDO5_STATUS), |
| regmap_reg_range(SLG51000_LDO6_EVENT, SLG51000_LDO6_STATUS), |
| regmap_reg_range(SLG51000_LDO7_EVENT, SLG51000_LDO7_STATUS), |
| regmap_reg_range(SLG51000_OTP_EVENT, SLG51000_OTP_EVENT), |
| }; |
| |
| static const struct regmap_access_table slg51000_writeable_table = { |
| .yes_ranges = slg51000_writeable_ranges, |
| .n_yes_ranges = ARRAY_SIZE(slg51000_writeable_ranges), |
| }; |
| |
| static const struct regmap_access_table slg51000_readable_table = { |
| .yes_ranges = slg51000_readable_ranges, |
| .n_yes_ranges = ARRAY_SIZE(slg51000_readable_ranges), |
| }; |
| |
| static const struct regmap_access_table slg51000_volatile_table = { |
| .yes_ranges = slg51000_volatile_ranges, |
| .n_yes_ranges = ARRAY_SIZE(slg51000_volatile_ranges), |
| }; |
| |
| static const struct regmap_config slg51000_regmap_config = { |
| .reg_bits = 16, |
| .val_bits = 8, |
| .max_register = 0x8000, |
| .wr_table = &slg51000_writeable_table, |
| .rd_table = &slg51000_readable_table, |
| .volatile_table = &slg51000_volatile_table, |
| }; |
| |
| static const struct regulator_ops slg51000_regl_ops = { |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| .list_voltage = regulator_list_voltage_linear, |
| .map_voltage = regulator_map_voltage_linear, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| }; |
| |
| static const struct regulator_ops slg51000_switch_ops = { |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| }; |
| |
| static int slg51000_of_parse_cb(struct device_node *np, |
| const struct regulator_desc *desc, |
| struct regulator_config *config) |
| { |
| struct slg51000 *chip = config->driver_data; |
| struct gpio_desc *ena_gpiod; |
| enum gpiod_flags gflags = GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE; |
| |
| ena_gpiod = devm_gpiod_get_from_of_node(chip->dev, np, |
| "enable-gpios", 0, |
| gflags, "gpio-en-ldo"); |
| if (!IS_ERR(ena_gpiod)) { |
| config->ena_gpiod = ena_gpiod; |
| devm_gpiod_unhinge(chip->dev, config->ena_gpiod); |
| } |
| |
| return 0; |
| } |
| |
| #define SLG51000_REGL_DESC(_id, _name, _s_name, _min, _step) \ |
| [SLG51000_REGULATOR_##_id] = { \ |
| .name = #_name, \ |
| .supply_name = _s_name, \ |
| .id = SLG51000_REGULATOR_##_id, \ |
| .of_match = of_match_ptr(#_name), \ |
| .of_parse_cb = slg51000_of_parse_cb, \ |
| .ops = &slg51000_regl_ops, \ |
| .regulators_node = of_match_ptr("regulators"), \ |
| .n_voltages = 256, \ |
| .min_uV = _min, \ |
| .uV_step = _step, \ |
| .linear_min_sel = 0, \ |
| .vsel_mask = SLG51000_VSEL_MASK, \ |
| .vsel_reg = SLG51000_##_id##_VSEL, \ |
| .enable_reg = SLG51000_SYSCTL_MATRIX_CONF_A, \ |
| .enable_mask = BIT(SLG51000_REGULATOR_##_id), \ |
| .type = REGULATOR_VOLTAGE, \ |
| .owner = THIS_MODULE, \ |
| } |
| |
| static struct regulator_desc regls_desc[SLG51000_MAX_REGULATORS] = { |
| SLG51000_REGL_DESC(LDO1, ldo1, NULL, 2400000, 5000), |
| SLG51000_REGL_DESC(LDO2, ldo2, NULL, 2400000, 5000), |
| SLG51000_REGL_DESC(LDO3, ldo3, "vin3", 1200000, 10000), |
| SLG51000_REGL_DESC(LDO4, ldo4, "vin4", 1200000, 10000), |
| SLG51000_REGL_DESC(LDO5, ldo5, "vin5", 400000, 5000), |
| SLG51000_REGL_DESC(LDO6, ldo6, "vin6", 400000, 5000), |
| SLG51000_REGL_DESC(LDO7, ldo7, "vin7", 1200000, 10000), |
| }; |
| |
| static int slg51000_regulator_init(struct slg51000 *chip) |
| { |
| struct regulator_config config = { }; |
| struct regulator_desc *rdesc; |
| unsigned int reg, val; |
| u8 vsel_range[2]; |
| int id, ret = 0; |
| const unsigned int min_regs[SLG51000_MAX_REGULATORS] = { |
| SLG51000_LDO1_MINV, SLG51000_LDO2_MINV, SLG51000_LDO3_MINV, |
| SLG51000_LDO4_MINV, SLG51000_LDO5_MINV, SLG51000_LDO6_MINV, |
| SLG51000_LDO7_MINV, |
| }; |
| |
| for (id = 0; id < SLG51000_MAX_REGULATORS; id++) { |
| chip->rdesc[id] = ®ls_desc[id]; |
| rdesc = chip->rdesc[id]; |
| config.regmap = chip->regmap; |
| config.dev = chip->dev; |
| config.driver_data = chip; |
| |
| ret = regmap_bulk_read(chip->regmap, min_regs[id], |
| vsel_range, 2); |
| if (ret < 0) { |
| dev_err(chip->dev, |
| "Failed to read the MIN register\n"); |
| return ret; |
| } |
| |
| switch (id) { |
| case SLG51000_REGULATOR_LDO1: |
| case SLG51000_REGULATOR_LDO2: |
| if (id == SLG51000_REGULATOR_LDO1) |
| reg = SLG51000_LDO1_MISC1; |
| else |
| reg = SLG51000_LDO2_MISC1; |
| |
| ret = regmap_read(chip->regmap, reg, &val); |
| if (ret < 0) { |
| dev_err(chip->dev, |
| "Failed to read voltage range of ldo%d\n", |
| id + 1); |
| return ret; |
| } |
| |
| rdesc->linear_min_sel = vsel_range[0]; |
| rdesc->n_voltages = vsel_range[1] + 1; |
| if (val & SLG51000_SEL_VRANGE_MASK) |
| rdesc->min_uV = SLG51000_LDOHP_HV_MIN |
| + (vsel_range[0] |
| * rdesc->uV_step); |
| else |
| rdesc->min_uV = SLG51000_LDOHP_LV_MIN |
| + (vsel_range[0] |
| * rdesc->uV_step); |
| break; |
| |
| case SLG51000_REGULATOR_LDO5: |
| case SLG51000_REGULATOR_LDO6: |
| if (id == SLG51000_REGULATOR_LDO5) |
| reg = SLG51000_LDO5_TRIM2; |
| else |
| reg = SLG51000_LDO6_TRIM2; |
| |
| ret = regmap_read(chip->regmap, reg, &val); |
| if (ret < 0) { |
| dev_err(chip->dev, |
| "Failed to read LDO mode register\n"); |
| return ret; |
| } |
| |
| if (val & SLG51000_SEL_BYP_MODE_MASK) { |
| rdesc->ops = &slg51000_switch_ops; |
| rdesc->n_voltages = 0; |
| rdesc->min_uV = 0; |
| rdesc->uV_step = 0; |
| rdesc->linear_min_sel = 0; |
| break; |
| } |
| /* Fall through - to the check below.*/ |
| |
| default: |
| rdesc->linear_min_sel = vsel_range[0]; |
| rdesc->n_voltages = vsel_range[1] + 1; |
| rdesc->min_uV = rdesc->min_uV |
| + (vsel_range[0] * rdesc->uV_step); |
| break; |
| } |
| |
| chip->rdev[id] = devm_regulator_register(chip->dev, rdesc, |
| &config); |
| if (IS_ERR(chip->rdev[id])) { |
| ret = PTR_ERR(chip->rdev[id]); |
| dev_err(chip->dev, |
| "Failed to register regulator(%s):%d\n", |
| chip->rdesc[id]->name, ret); |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static irqreturn_t slg51000_irq_handler(int irq, void *data) |
| { |
| struct slg51000 *chip = data; |
| struct regmap *regmap = chip->regmap; |
| enum { R0 = 0, R1, R2, REG_MAX }; |
| u8 evt[SLG51000_MAX_EVT_REGISTER][REG_MAX]; |
| int ret, i, handled = IRQ_NONE; |
| unsigned int evt_otp, mask_otp; |
| |
| /* Read event[R0], status[R1] and mask[R2] register */ |
| for (i = 0; i < SLG51000_MAX_EVT_REGISTER; i++) { |
| ret = regmap_bulk_read(regmap, es_reg[i].ereg, evt[i], REG_MAX); |
| if (ret < 0) { |
| dev_err(chip->dev, |
| "Failed to read event registers(%d)\n", ret); |
| return IRQ_NONE; |
| } |
| } |
| |
| ret = regmap_read(regmap, SLG51000_OTP_EVENT, &evt_otp); |
| if (ret < 0) { |
| dev_err(chip->dev, |
| "Failed to read otp event registers(%d)\n", ret); |
| return IRQ_NONE; |
| } |
| |
| ret = regmap_read(regmap, SLG51000_OTP_IRQ_MASK, &mask_otp); |
| if (ret < 0) { |
| dev_err(chip->dev, |
| "Failed to read otp mask register(%d)\n", ret); |
| return IRQ_NONE; |
| } |
| |
| if ((evt_otp & SLG51000_EVT_CRC_MASK) && |
| !(mask_otp & SLG51000_IRQ_CRC_MASK)) { |
| dev_info(chip->dev, |
| "OTP has been read or OTP crc is not zero\n"); |
| handled = IRQ_HANDLED; |
| } |
| |
| for (i = 0; i < SLG51000_MAX_REGULATORS; i++) { |
| if (!(evt[i][R2] & SLG51000_IRQ_ILIM_FLAG_MASK) && |
| (evt[i][R0] & SLG51000_EVT_ILIM_FLAG_MASK)) { |
| regulator_lock(chip->rdev[i]); |
| regulator_notifier_call_chain(chip->rdev[i], |
| REGULATOR_EVENT_OVER_CURRENT, NULL); |
| regulator_unlock(chip->rdev[i]); |
| |
| if (evt[i][R1] & SLG51000_STA_ILIM_FLAG_MASK) |
| dev_warn(chip->dev, |
| "Over-current limit(ldo%d)\n", i + 1); |
| handled = IRQ_HANDLED; |
| } |
| } |
| |
| if (!(evt[SLG51000_SCTL_EVT][R2] & SLG51000_IRQ_HIGH_TEMP_WARN_MASK) && |
| (evt[SLG51000_SCTL_EVT][R0] & SLG51000_EVT_HIGH_TEMP_WARN_MASK)) { |
| for (i = 0; i < SLG51000_MAX_REGULATORS; i++) { |
| if (!(evt[i][R1] & SLG51000_STA_ILIM_FLAG_MASK) && |
| (evt[i][R1] & SLG51000_STA_VOUT_OK_FLAG_MASK)) { |
| regulator_lock(chip->rdev[i]); |
| regulator_notifier_call_chain(chip->rdev[i], |
| REGULATOR_EVENT_OVER_TEMP, NULL); |
| regulator_unlock(chip->rdev[i]); |
| } |
| } |
| handled = IRQ_HANDLED; |
| if (evt[SLG51000_SCTL_EVT][R1] & |
| SLG51000_STA_HIGH_TEMP_WARN_MASK) |
| dev_warn(chip->dev, "High temperature warning!\n"); |
| } |
| |
| return handled; |
| } |
| |
| static void slg51000_clear_fault_log(struct slg51000 *chip) |
| { |
| unsigned int val = 0; |
| int ret = 0; |
| |
| ret = regmap_read(chip->regmap, SLG51000_SYSCTL_FAULT_LOG1, &val); |
| if (ret < 0) { |
| dev_err(chip->dev, "Failed to read Fault log register\n"); |
| return; |
| } |
| |
| if (val & SLG51000_FLT_OVER_TEMP_MASK) |
| dev_dbg(chip->dev, "Fault log: FLT_OVER_TEMP\n"); |
| if (val & SLG51000_FLT_POWER_SEQ_CRASH_REQ_MASK) |
| dev_dbg(chip->dev, "Fault log: FLT_POWER_SEQ_CRASH_REQ\n"); |
| if (val & SLG51000_FLT_RST_MASK) |
| dev_dbg(chip->dev, "Fault log: FLT_RST\n"); |
| if (val & SLG51000_FLT_POR_MASK) |
| dev_dbg(chip->dev, "Fault log: FLT_POR\n"); |
| } |
| |
| static int slg51000_i2c_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct device *dev = &client->dev; |
| struct slg51000 *chip; |
| struct gpio_desc *cs_gpiod = NULL; |
| int error, ret; |
| |
| chip = devm_kzalloc(dev, sizeof(struct slg51000), GFP_KERNEL); |
| if (!chip) |
| return -ENOMEM; |
| |
| cs_gpiod = devm_gpiod_get_from_of_node(dev, dev->of_node, |
| "dlg,cs-gpios", 0, |
| GPIOD_OUT_HIGH |
| | GPIOD_FLAGS_BIT_NONEXCLUSIVE, |
| "slg51000-cs"); |
| if (!IS_ERR(cs_gpiod)) { |
| dev_info(dev, "Found chip selector property\n"); |
| chip->cs_gpiod = cs_gpiod; |
| } |
| |
| i2c_set_clientdata(client, chip); |
| chip->chip_irq = client->irq; |
| chip->dev = dev; |
| chip->regmap = devm_regmap_init_i2c(client, &slg51000_regmap_config); |
| if (IS_ERR(chip->regmap)) { |
| error = PTR_ERR(chip->regmap); |
| dev_err(dev, "Failed to allocate register map: %d\n", |
| error); |
| return error; |
| } |
| |
| ret = slg51000_regulator_init(chip); |
| if (ret < 0) { |
| dev_err(chip->dev, "Failed to init regulator(%d)\n", ret); |
| return ret; |
| } |
| |
| slg51000_clear_fault_log(chip); |
| |
| if (chip->chip_irq) { |
| ret = devm_request_threaded_irq(dev, chip->chip_irq, NULL, |
| slg51000_irq_handler, |
| (IRQF_TRIGGER_HIGH | |
| IRQF_ONESHOT), |
| "slg51000-irq", chip); |
| if (ret != 0) { |
| dev_err(dev, "Failed to request IRQ: %d\n", |
| chip->chip_irq); |
| return ret; |
| } |
| } else { |
| dev_info(dev, "No IRQ configured\n"); |
| } |
| |
| return ret; |
| } |
| |
| static const struct i2c_device_id slg51000_i2c_id[] = { |
| {"slg51000", 0}, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(i2c, slg51000_i2c_id); |
| |
| static struct i2c_driver slg51000_regulator_driver = { |
| .driver = { |
| .name = "slg51000-regulator", |
| }, |
| .probe = slg51000_i2c_probe, |
| .id_table = slg51000_i2c_id, |
| }; |
| |
| module_i2c_driver(slg51000_regulator_driver); |
| |
| MODULE_AUTHOR("Eric Jeong <eric.jeong.opensource@diasemi.com>"); |
| MODULE_DESCRIPTION("SLG51000 regulator driver"); |
| MODULE_LICENSE("GPL"); |
| |