diff options
Diffstat (limited to 'drivers/regulator/bd71815-regulator.c')
| -rw-r--r-- | drivers/regulator/bd71815-regulator.c | 652 |
1 files changed, 652 insertions, 0 deletions
diff --git a/drivers/regulator/bd71815-regulator.c b/drivers/regulator/bd71815-regulator.c new file mode 100644 index 000000000000..a4e8d5e36b40 --- /dev/null +++ b/drivers/regulator/bd71815-regulator.c @@ -0,0 +1,652 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// Copyright 2014 Embest Technology Co. Ltd. Inc. +// bd71815-regulator.c ROHM BD71815 regulator driver +// +// Author: Tony Luo <luofc@embedinfo.com> +// +// Partially rewritten at 2021 by +// Matti Vaittinen <matti.vaitinen@fi.rohmeurope.com> + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/gpio.h> +#include <linux/mfd/rohm-generic.h> +#include <linux/mfd/rohm-bd71815.h> +#include <linux/regulator/of_regulator.h> + +struct bd71815_regulator { + struct regulator_desc desc; + const struct rohm_dvs_config *dvs; +}; + +struct bd71815_pmic { + struct bd71815_regulator descs[BD71815_REGULATOR_CNT]; + struct regmap *regmap; + struct device *dev; + struct gpio_descs *gps; + struct regulator_dev *rdev[BD71815_REGULATOR_CNT]; +}; + +static const int bd7181x_wled_currents[] = { + 10, 20, 30, 50, 70, 100, 200, 300, 500, 700, 1000, 2000, 3000, 4000, + 5000, 6000, 7000, 8000, 9000, 10000, 11000, 12000, 13000, 14000, 15000, + 16000, 17000, 18000, 19000, 20000, 21000, 22000, 23000, 24000, 25000, +}; + +static const struct rohm_dvs_config buck1_dvs = { + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, + .run_reg = BD71815_REG_BUCK1_VOLT_H, + .run_mask = BD71815_VOLT_MASK, + .run_on_mask = BD71815_BUCK_RUN_ON, + .snvs_on_mask = BD71815_BUCK_SNVS_ON, + .suspend_reg = BD71815_REG_BUCK1_VOLT_L, + .suspend_mask = BD71815_VOLT_MASK, + .suspend_on_mask = BD71815_BUCK_SUSP_ON, + .lpsr_reg = BD71815_REG_BUCK1_VOLT_L, + .lpsr_mask = BD71815_VOLT_MASK, + .lpsr_on_mask = BD71815_BUCK_LPSR_ON, +}; + +static const struct rohm_dvs_config buck2_dvs = { + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, + .run_reg = BD71815_REG_BUCK2_VOLT_H, + .run_mask = BD71815_VOLT_MASK, + .run_on_mask = BD71815_BUCK_RUN_ON, + .snvs_on_mask = BD71815_BUCK_SNVS_ON, + .suspend_reg = BD71815_REG_BUCK2_VOLT_L, + .suspend_mask = BD71815_VOLT_MASK, + .suspend_on_mask = BD71815_BUCK_SUSP_ON, + .lpsr_reg = BD71815_REG_BUCK2_VOLT_L, + .lpsr_mask = BD71815_VOLT_MASK, + .lpsr_on_mask = BD71815_BUCK_LPSR_ON, +}; + +static const struct rohm_dvs_config buck3_dvs = { + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, + .run_reg = BD71815_REG_BUCK3_VOLT, + .run_mask = BD71815_VOLT_MASK, + .run_on_mask = BD71815_BUCK_RUN_ON, + .snvs_on_mask = BD71815_BUCK_SNVS_ON, + .suspend_on_mask = BD71815_BUCK_SUSP_ON, + .lpsr_on_mask = BD71815_BUCK_LPSR_ON, +}; + +static const struct rohm_dvs_config buck4_dvs = { + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, + .run_reg = BD71815_REG_BUCK4_VOLT, + .run_mask = BD71815_VOLT_MASK, + .run_on_mask = BD71815_BUCK_RUN_ON, + .snvs_on_mask = BD71815_BUCK_SNVS_ON, + .suspend_on_mask = BD71815_BUCK_SUSP_ON, + .lpsr_on_mask = BD71815_BUCK_LPSR_ON, +}; + +static const struct rohm_dvs_config ldo1_dvs = { + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, + .run_reg = BD71815_REG_LDO_MODE1, + .run_mask = BD71815_VOLT_MASK, + .run_on_mask = LDO1_RUN_ON, + .snvs_on_mask = LDO1_SNVS_ON, + .suspend_on_mask = LDO1_SUSP_ON, + .lpsr_on_mask = LDO1_LPSR_ON, +}; + +static const struct rohm_dvs_config ldo2_dvs = { + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, + .run_reg = BD71815_REG_LDO_MODE2, + .run_mask = BD71815_VOLT_MASK, + .run_on_mask = LDO2_RUN_ON, + .snvs_on_mask = LDO2_SNVS_ON, + .suspend_on_mask = LDO2_SUSP_ON, + .lpsr_on_mask = LDO2_LPSR_ON, +}; + +static const struct rohm_dvs_config ldo3_dvs = { + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, + .run_reg = BD71815_REG_LDO_MODE2, + .run_mask = BD71815_VOLT_MASK, + .run_on_mask = LDO3_RUN_ON, + .snvs_on_mask = LDO3_SNVS_ON, + .suspend_on_mask = LDO3_SUSP_ON, + .lpsr_on_mask = LDO3_LPSR_ON, +}; + +static const struct rohm_dvs_config ldo4_dvs = { + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, + .run_reg = BD71815_REG_LDO_MODE3, + .run_mask = BD71815_VOLT_MASK, + .run_on_mask = LDO4_RUN_ON, + .snvs_on_mask = LDO4_SNVS_ON, + .suspend_on_mask = LDO4_SUSP_ON, + .lpsr_on_mask = LDO4_LPSR_ON, +}; + +static const struct rohm_dvs_config ldo5_dvs = { + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, + .run_reg = BD71815_REG_LDO_MODE3, + .run_mask = BD71815_VOLT_MASK, + .run_on_mask = LDO5_RUN_ON, + .snvs_on_mask = LDO5_SNVS_ON, + .suspend_on_mask = LDO5_SUSP_ON, + .lpsr_on_mask = LDO5_LPSR_ON, +}; + +static const struct rohm_dvs_config dvref_dvs = { + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, + .run_on_mask = DVREF_RUN_ON, + .snvs_on_mask = DVREF_SNVS_ON, + .suspend_on_mask = DVREF_SUSP_ON, + .lpsr_on_mask = DVREF_LPSR_ON, +}; + +static const struct rohm_dvs_config ldolpsr_dvs = { + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, + .run_on_mask = DVREF_RUN_ON, + .snvs_on_mask = DVREF_SNVS_ON, + .suspend_on_mask = DVREF_SUSP_ON, + .lpsr_on_mask = DVREF_LPSR_ON, +}; + +static const struct rohm_dvs_config buck5_dvs = { + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, + .run_reg = BD71815_REG_BUCK5_VOLT, + .run_mask = BD71815_VOLT_MASK, + .run_on_mask = BD71815_BUCK_RUN_ON, + .snvs_on_mask = BD71815_BUCK_SNVS_ON, + .suspend_on_mask = BD71815_BUCK_SUSP_ON, + .lpsr_on_mask = BD71815_BUCK_LPSR_ON, +}; + +static int set_hw_dvs_levels(struct device_node *np, + const struct regulator_desc *desc, + struct regulator_config *cfg) +{ + struct bd71815_regulator *data; + + data = container_of(desc, struct bd71815_regulator, desc); + return rohm_regulator_set_dvs_levels(data->dvs, np, desc, cfg->regmap); +} + +/* + * Bucks 1 and 2 have two voltage selection registers where selected + * voltage can be set. Which of the registers is used can be either controlled + * by a control bit in register - or by HW state. If HW state specific voltages + * are given - then we assume HW state based control should be used. + * + * If volatge value is updated to currently selected register - then output + * voltage is immediately changed no matter what is set as ramp rate. Thus we + * default changing voltage by writing new value to inactive register and + * then updating the 'register selection' bit. This naturally only works when + * HW state machine is not used to select the voltage. + */ +static int buck12_set_hw_dvs_levels(struct device_node *np, + const struct regulator_desc *desc, + struct regulator_config *cfg) +{ + struct bd71815_regulator *data; + int ret = 0, val; + + data = container_of(desc, struct bd71815_regulator, desc); + + if (of_find_property(np, "rohm,dvs-run-voltage", NULL) || + of_find_property(np, "rohm,dvs-suspend-voltage", NULL) || + of_find_property(np, "rohm,dvs-lpsr-voltage", NULL) || + of_find_property(np, "rohm,dvs-snvs-voltage", NULL)) { + ret = regmap_read(cfg->regmap, desc->vsel_reg, &val); + if (ret) + return ret; + + if (!(BD71815_BUCK_STBY_DVS & val) && + !(BD71815_BUCK_DVSSEL & val)) { + int val2; + + /* + * We are currently using voltage from _L. + * We'd better copy it to _H and switch to it to + * avoid shutting us down if LPSR or SUSPEND is set to + * disabled. _L value is at reg _H + 1 + */ + ret = regmap_read(cfg->regmap, desc->vsel_reg + 1, + &val2); + if (ret) + return ret; + + ret = regmap_update_bits(cfg->regmap, desc->vsel_reg, + BD71815_VOLT_MASK | + BD71815_BUCK_DVSSEL, + val2 | BD71815_BUCK_DVSSEL); + if (ret) + return ret; + } + ret = rohm_regulator_set_dvs_levels(data->dvs, np, desc, + cfg->regmap); + if (ret) + return ret; + /* + * DVS levels were given => use HW-state machine for voltage + * controls. NOTE: AFAIK, This means that if voltage is changed + * by SW the ramp-rate is not respected. Should we disable + * SW voltage control when the HW state machine is used? + */ + ret = regmap_update_bits(cfg->regmap, desc->vsel_reg, + BD71815_BUCK_STBY_DVS, + BD71815_BUCK_STBY_DVS); + } + + return ret; +} + +/* + * BUCK1/2 + * BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting + * 00: 10.00mV/usec 10mV 1uS + * 01: 5.00mV/usec 10mV 2uS + * 10: 2.50mV/usec 10mV 4uS + * 11: 1.25mV/usec 10mV 8uS + */ +static const unsigned int bd7181x_ramp_table[] = { 1250, 2500, 5000, 10000 }; + +static int bd7181x_led_set_current_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + int ret; + int onstatus; + + onstatus = regulator_is_enabled_regmap(rdev); + + ret = regulator_set_current_limit_regmap(rdev, min_uA, max_uA); + if (!ret) { + int newstatus; + + newstatus = regulator_is_enabled_regmap(rdev); + if (onstatus != newstatus) { + /* + * HW FIX: spurious led status change detected. Toggle + * state as a workaround + */ + if (onstatus) + ret = regulator_enable_regmap(rdev); + else + ret = regulator_disable_regmap(rdev); + + if (ret) + dev_err(rdev_get_dev(rdev), + "failed to revert the LED state (%d)\n", + ret); + } + } + + return ret; +} + +static int bd7181x_buck12_get_voltage_sel(struct regulator_dev *rdev) +{ + struct bd71815_pmic *pmic = rdev_get_drvdata(rdev); + int rid = rdev_get_id(rdev); + int ret, regh, regl, val; + + regh = BD71815_REG_BUCK1_VOLT_H + rid * 0x2; + regl = BD71815_REG_BUCK1_VOLT_L + rid * 0x2; + + ret = regmap_read(pmic->regmap, regh, &val); + if (ret) + return ret; + + /* + * If we use HW state machine based voltage reg selection - then we + * return BD71815_REG_BUCK1_VOLT_H which is used at RUN. + * Else we do return the BD71815_REG_BUCK1_VOLT_H or + * BD71815_REG_BUCK1_VOLT_L depending on which is selected to be used + * by BD71815_BUCK_DVSSEL bit + */ + if ((!(val & BD71815_BUCK_STBY_DVS)) && (!(val & BD71815_BUCK_DVSSEL))) + ret = regmap_read(pmic->regmap, regl, &val); + + if (ret) + return ret; + + return val & BD71815_VOLT_MASK; +} + +/* + * For Buck 1/2. + */ +static int bd7181x_buck12_set_voltage_sel(struct regulator_dev *rdev, + unsigned int sel) +{ + struct bd71815_pmic *pmic = rdev_get_drvdata(rdev); + int rid = rdev_get_id(rdev); + int ret, val, reg, regh, regl; + + regh = BD71815_REG_BUCK1_VOLT_H + rid*0x2; + regl = BD71815_REG_BUCK1_VOLT_L + rid*0x2; + + ret = regmap_read(pmic->regmap, regh, &val); + if (ret) + return ret; + + /* + * If bucks 1 & 2 are controlled by state machine - then the RUN state + * voltage is set to BD71815_REG_BUCK1_VOLT_H. Changing SUSPEND/LPSR + * voltages at runtime is not supported by this driver. + */ + if (((val & BD71815_BUCK_STBY_DVS))) { + return regmap_update_bits(pmic->regmap, regh, BD71815_VOLT_MASK, + sel); + } + /* Update new voltage to the register which is not selected now */ + if (val & BD71815_BUCK_DVSSEL) + reg = regl; + else + reg = regh; + + ret = regmap_update_bits(pmic->regmap, reg, BD71815_VOLT_MASK, sel); + if (ret) + return ret; + + /* Select the other DVS register to be used */ + return regmap_update_bits(pmic->regmap, regh, BD71815_BUCK_DVSSEL, ~val); +} + +static const struct regulator_ops bd7181x_ldo_regulator_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, +}; + +static const struct regulator_ops bd7181x_fixed_regulator_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .list_voltage = regulator_list_voltage_linear, +}; + +static const struct regulator_ops bd7181x_buck_regulator_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_voltage_time_sel = regulator_set_voltage_time_sel, +}; + +static const struct regulator_ops bd7181x_buck12_regulator_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .list_voltage = regulator_list_voltage_linear, + .set_voltage_sel = bd7181x_buck12_set_voltage_sel, + .get_voltage_sel = bd7181x_buck12_get_voltage_sel, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .set_ramp_delay = regulator_set_ramp_delay_regmap, +}; + +static const struct regulator_ops bd7181x_led_regulator_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .set_current_limit = bd7181x_led_set_current_limit, + .get_current_limit = regulator_get_current_limit_regmap, +}; + +#define BD71815_FIXED_REG(_name, _id, ereg, emsk, voltage, _dvs) \ + [(_id)] = { \ + .desc = { \ + .name = #_name, \ + .of_match = of_match_ptr(#_name), \ + .regulators_node = of_match_ptr("regulators"), \ + .n_voltages = 1, \ + .ops = &bd7181x_fixed_regulator_ops, \ + .type = REGULATOR_VOLTAGE, \ + .id = (_id), \ + .owner = THIS_MODULE, \ + .min_uV = (voltage), \ + .enable_reg = (ereg), \ + .enable_mask = (emsk), \ + .of_parse_cb = set_hw_dvs_levels, \ + }, \ + .dvs = (_dvs), \ + } + +#define BD71815_BUCK_REG(_name, _id, vsel, ereg, min, max, step, _dvs) \ + [(_id)] = { \ + .desc = { \ + .name = #_name, \ + .of_match = of_match_ptr(#_name), \ + .regulators_node = of_match_ptr("regulators"), \ + .n_voltages = ((max) - (min)) / (step) + 1, \ + .ops = &bd7181x_buck_regulator_ops, \ + .type = REGULATOR_VOLTAGE, \ + .id = (_id), \ + .owner = THIS_MODULE, \ + .min_uV = (min), \ + .uV_step = (step), \ + .vsel_reg = (vsel), \ + .vsel_mask = BD71815_VOLT_MASK, \ + .enable_reg = (ereg), \ + .enable_mask = BD71815_BUCK_RUN_ON, \ + .of_parse_cb = set_hw_dvs_levels, \ + }, \ + .dvs = (_dvs), \ + } + +#define BD71815_BUCK12_REG(_name, _id, vsel, ereg, min, max, step, \ + _dvs) \ + [(_id)] = { \ + .desc = { \ + .name = #_name, \ + .of_match = of_match_ptr(#_name), \ + .regulators_node = of_match_ptr("regulators"), \ + .n_voltages = ((max) - (min)) / (step) + 1, \ + .ops = &bd7181x_buck12_regulator_ops, \ + .type = REGULATOR_VOLTAGE, \ + .id = (_id), \ + .owner = THIS_MODULE, \ + .min_uV = (min), \ + .uV_step = (step), \ + .vsel_reg = (vsel), \ + .vsel_mask = 0x3f, \ + .enable_reg = (ereg), \ + .enable_mask = 0x04, \ + .ramp_reg = (ereg), \ + .ramp_mask = BD71815_BUCK_RAMPRATE_MASK, \ + .ramp_delay_table = bd7181x_ramp_table, \ + .n_ramp_values = ARRAY_SIZE(bd7181x_ramp_table),\ + .of_parse_cb = buck12_set_hw_dvs_levels, \ + }, \ + .dvs = (_dvs), \ + } + +#define BD71815_LED_REG(_name, _id, csel, mask, ereg, emsk, currents) \ + [(_id)] = { \ + .desc = { \ + .name = #_name, \ + .of_match = of_match_ptr(#_name), \ + .regulators_node = of_match_ptr("regulators"), \ + .n_current_limits = ARRAY_SIZE(currents), \ + .ops = &bd7181x_led_regulator_ops, \ + .type = REGULATOR_CURRENT, \ + .id = (_id), \ + .owner = THIS_MODULE, \ + .curr_table = currents, \ + .csel_reg = (csel), \ + .csel_mask = (mask), \ + .enable_reg = (ereg), \ + .enable_mask = (emsk), \ + }, \ + } + +#define BD71815_LDO_REG(_name, _id, vsel, ereg, emsk, min, max, step, \ + _dvs) \ + [(_id)] = { \ + .desc = { \ + .name = #_name, \ + .of_match = of_match_ptr(#_name), \ + .regulators_node = of_match_ptr("regulators"), \ + .n_voltages = ((max) - (min)) / (step) + 1, \ + .ops = &bd7181x_ldo_regulator_ops, \ + .type = REGULATOR_VOLTAGE, \ + .id = (_id), \ + .owner = THIS_MODULE, \ + .min_uV = (min), \ + .uV_step = (step), \ + .vsel_reg = (vsel), \ + .vsel_mask = BD71815_VOLT_MASK, \ + .enable_reg = (ereg), \ + .enable_mask = (emsk), \ + .of_parse_cb = set_hw_dvs_levels, \ + }, \ + .dvs = (_dvs), \ + } + +static struct bd71815_regulator bd71815_regulators[] = { + BD71815_BUCK12_REG(buck1, BD71815_BUCK1, BD71815_REG_BUCK1_VOLT_H, + BD71815_REG_BUCK1_MODE, 800000, 2000000, 25000, + &buck1_dvs), + BD71815_BUCK12_REG(buck2, BD71815_BUCK2, BD71815_REG_BUCK2_VOLT_H, + BD71815_REG_BUCK2_MODE, 800000, 2000000, 25000, + &buck2_dvs), + BD71815_BUCK_REG(buck3, BD71815_BUCK3, BD71815_REG_BUCK3_VOLT, + BD71815_REG_BUCK3_MODE, 1200000, 2700000, 50000, + &buck3_dvs), + BD71815_BUCK_REG(buck4, BD71815_BUCK4, BD71815_REG_BUCK4_VOLT, + BD71815_REG_BUCK4_MODE, 1100000, 1850000, 25000, + &buck4_dvs), + BD71815_BUCK_REG(buck5, BD71815_BUCK5, BD71815_REG_BUCK5_VOLT, + BD71815_REG_BUCK5_MODE, 1800000, 3300000, 50000, + &buck5_dvs), + BD71815_LDO_REG(ldo1, BD71815_LDO1, BD71815_REG_LDO1_VOLT, + BD71815_REG_LDO_MODE1, LDO1_RUN_ON, 800000, 3300000, + 50000, &ldo1_dvs), + BD71815_LDO_REG(ldo2, BD71815_LDO2, BD71815_REG_LDO2_VOLT, + BD71815_REG_LDO_MODE2, LDO2_RUN_ON, 800000, 3300000, + 50000, &ldo2_dvs), + /* + * Let's default LDO3 to be enabled by SW. We can override ops if DT + * says LDO3 should be enabled by HW when DCIN is connected. + */ + BD71815_LDO_REG(ldo3, BD71815_LDO3, BD71815_REG_LDO3_VOLT, + BD71815_REG_LDO_MODE2, LDO3_RUN_ON, 800000, 3300000, + 50000, &ldo3_dvs), + BD71815_LDO_REG(ldo4, BD71815_LDO4, BD71815_REG_LDO4_VOLT, + BD71815_REG_LDO_MODE3, LDO4_RUN_ON, 800000, 3300000, + 50000, &ldo4_dvs), + BD71815_LDO_REG(ldo5, BD71815_LDO5, BD71815_REG_LDO5_VOLT_H, + BD71815_REG_LDO_MODE3, LDO5_RUN_ON, 800000, 3300000, + 50000, &ldo5_dvs), + BD71815_FIXED_REG(ldodvref, BD71815_LDODVREF, BD71815_REG_LDO_MODE4, + DVREF_RUN_ON, 3000000, &dvref_dvs), + BD71815_FIXED_REG(ldolpsr, BD71815_LDOLPSR, BD71815_REG_LDO_MODE4, + LDO_LPSR_RUN_ON, 1800000, &ldolpsr_dvs), + BD71815_LED_REG(wled, BD71815_WLED, BD71815_REG_LED_DIMM, LED_DIMM_MASK, + BD71815_REG_LED_CTRL, LED_RUN_ON, + bd7181x_wled_currents), +}; + +static int bd7181x_probe(struct platform_device *pdev) +{ + struct bd71815_pmic *pmic; + struct regulator_config config = {}; + int i, ret; + struct gpio_desc *ldo4_en; + + pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL); + if (!pmic) + return -ENOMEM; + + memcpy(pmic->descs, bd71815_regulators, sizeof(pmic->descs)); + + pmic->dev = &pdev->dev; + pmic->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!pmic->regmap) { + dev_err(pmic->dev, "No parent regmap\n"); + return -ENODEV; + } + platform_set_drvdata(pdev, pmic); + ldo4_en = devm_gpiod_get_from_of_node(&pdev->dev, + pdev->dev.parent->of_node, + "rohm,vsel-gpios", 0, + GPIOD_ASIS, "ldo4-en"); + + if (IS_ERR(ldo4_en)) { + ret = PTR_ERR(ldo4_en); + if (ret != -ENOENT) + return ret; + ldo4_en = NULL; + } + + /* Disable to go to ship-mode */ + ret = regmap_update_bits(pmic->regmap, BD71815_REG_PWRCTRL, + RESTARTEN, 0); + if (ret) + return ret; + + config.dev = pdev->dev.parent; + config.regmap = pmic->regmap; + + for (i = 0; i < BD71815_REGULATOR_CNT; i++) { + struct regulator_desc *desc; + struct regulator_dev *rdev; + + desc = &pmic->descs[i].desc; + if (i == BD71815_LDO4) + config.ena_gpiod = ldo4_en; + + config.driver_data = pmic; + + rdev = devm_regulator_register(&pdev->dev, desc, &config); + if (IS_ERR(rdev)) { + dev_err(&pdev->dev, + "failed to register %s regulator\n", + desc->name); + return PTR_ERR(rdev); + } + config.ena_gpiod = NULL; + pmic->rdev[i] = rdev; + } + return 0; +} + +static const struct platform_device_id bd7181x_pmic_id[] = { + { "bd71815-pmic", ROHM_CHIP_TYPE_BD71815 }, + { }, +}; +MODULE_DEVICE_TABLE(platform, bd7181x_pmic_id); + +static struct platform_driver bd7181x_regulator = { + .driver = { + .name = "bd7181x-pmic", + .owner = THIS_MODULE, + }, + .probe = bd7181x_probe, + .id_table = bd7181x_pmic_id, +}; +module_platform_driver(bd7181x_regulator); + +MODULE_AUTHOR("Tony Luo <luofc@embedinfo.com>"); +MODULE_DESCRIPTION("BD71815 voltage regulator driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:bd7181x-pmic"); |