289 lines
8.3 KiB
C
289 lines
8.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2018 ROHM Semiconductors
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// bd70528-regulator.c ROHM BD70528MWV regulator driver
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mfd/rohm-bd70528.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/slab.h>
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#define BUCK_RAMPRATE_250MV 0
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#define BUCK_RAMPRATE_125MV 1
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#define BUCK_RAMP_MAX 250
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static const struct regulator_linear_range bd70528_buck1_volts[] = {
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REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x1, 600000),
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REGULATOR_LINEAR_RANGE(2750000, 0x2, 0xf, 50000),
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};
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static const struct regulator_linear_range bd70528_buck2_volts[] = {
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REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x1, 300000),
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REGULATOR_LINEAR_RANGE(1550000, 0x2, 0xd, 50000),
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REGULATOR_LINEAR_RANGE(3000000, 0xe, 0xf, 300000),
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};
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static const struct regulator_linear_range bd70528_buck3_volts[] = {
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REGULATOR_LINEAR_RANGE(800000, 0x00, 0xd, 50000),
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REGULATOR_LINEAR_RANGE(1800000, 0xe, 0xf, 0),
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};
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/* All LDOs have same voltage ranges */
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static const struct regulator_linear_range bd70528_ldo_volts[] = {
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REGULATOR_LINEAR_RANGE(1650000, 0x0, 0x07, 50000),
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REGULATOR_LINEAR_RANGE(2100000, 0x8, 0x0f, 100000),
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REGULATOR_LINEAR_RANGE(2850000, 0x10, 0x19, 50000),
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REGULATOR_LINEAR_RANGE(3300000, 0x19, 0x1f, 0),
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};
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/* Also both LEDs support same voltages */
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static const unsigned int led_volts[] = {
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20000, 30000
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};
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static int bd70528_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
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{
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if (ramp_delay > 0 && ramp_delay <= BUCK_RAMP_MAX) {
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unsigned int ramp_value = BUCK_RAMPRATE_250MV;
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if (ramp_delay <= 125)
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ramp_value = BUCK_RAMPRATE_125MV;
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return regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
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BD70528_MASK_BUCK_RAMP,
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ramp_value << BD70528_SIFT_BUCK_RAMP);
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}
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dev_err(&rdev->dev, "%s: ramp_delay: %d not supported\n",
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rdev->desc->name, ramp_delay);
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return -EINVAL;
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}
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static int bd70528_led_set_voltage_sel(struct regulator_dev *rdev,
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unsigned int sel)
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{
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int ret;
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ret = regulator_is_enabled_regmap(rdev);
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if (ret < 0)
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return ret;
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if (ret == 0)
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return regulator_set_voltage_sel_regmap(rdev, sel);
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dev_err(&rdev->dev,
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"LED voltage change not allowed when led is enabled\n");
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return -EBUSY;
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}
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static const struct regulator_ops bd70528_buck_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_linear_range,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_time_sel = regulator_set_voltage_time_sel,
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.set_ramp_delay = bd70528_set_ramp_delay,
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};
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static const struct regulator_ops bd70528_ldo_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_linear_range,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_time_sel = regulator_set_voltage_time_sel,
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.set_ramp_delay = bd70528_set_ramp_delay,
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};
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static const struct regulator_ops bd70528_led_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_table,
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.set_voltage_sel = bd70528_led_set_voltage_sel,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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};
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static const struct regulator_desc bd70528_desc[] = {
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{
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.name = "buck1",
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.of_match = of_match_ptr("BUCK1"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD70528_BUCK1,
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.ops = &bd70528_buck_ops,
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.type = REGULATOR_VOLTAGE,
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.linear_ranges = bd70528_buck1_volts,
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.n_linear_ranges = ARRAY_SIZE(bd70528_buck1_volts),
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.n_voltages = BD70528_BUCK_VOLTS,
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.enable_reg = BD70528_REG_BUCK1_EN,
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.enable_mask = BD70528_MASK_RUN_EN,
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.vsel_reg = BD70528_REG_BUCK1_VOLT,
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.vsel_mask = BD70528_MASK_BUCK_VOLT,
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.owner = THIS_MODULE,
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},
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{
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.name = "buck2",
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.of_match = of_match_ptr("BUCK2"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD70528_BUCK2,
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.ops = &bd70528_buck_ops,
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.type = REGULATOR_VOLTAGE,
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.linear_ranges = bd70528_buck2_volts,
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.n_linear_ranges = ARRAY_SIZE(bd70528_buck2_volts),
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.n_voltages = BD70528_BUCK_VOLTS,
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.enable_reg = BD70528_REG_BUCK2_EN,
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.enable_mask = BD70528_MASK_RUN_EN,
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.vsel_reg = BD70528_REG_BUCK2_VOLT,
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.vsel_mask = BD70528_MASK_BUCK_VOLT,
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.owner = THIS_MODULE,
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},
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{
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.name = "buck3",
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.of_match = of_match_ptr("BUCK3"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD70528_BUCK3,
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.ops = &bd70528_buck_ops,
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.type = REGULATOR_VOLTAGE,
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.linear_ranges = bd70528_buck3_volts,
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.n_linear_ranges = ARRAY_SIZE(bd70528_buck3_volts),
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.n_voltages = BD70528_BUCK_VOLTS,
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.enable_reg = BD70528_REG_BUCK3_EN,
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.enable_mask = BD70528_MASK_RUN_EN,
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.vsel_reg = BD70528_REG_BUCK3_VOLT,
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.vsel_mask = BD70528_MASK_BUCK_VOLT,
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.owner = THIS_MODULE,
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},
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{
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.name = "ldo1",
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.of_match = of_match_ptr("LDO1"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD70528_LDO1,
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.ops = &bd70528_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.linear_ranges = bd70528_ldo_volts,
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.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),
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.n_voltages = BD70528_LDO_VOLTS,
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.enable_reg = BD70528_REG_LDO1_EN,
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.enable_mask = BD70528_MASK_RUN_EN,
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.vsel_reg = BD70528_REG_LDO1_VOLT,
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.vsel_mask = BD70528_MASK_LDO_VOLT,
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.owner = THIS_MODULE,
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},
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{
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.name = "ldo2",
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.of_match = of_match_ptr("LDO2"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD70528_LDO2,
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.ops = &bd70528_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.linear_ranges = bd70528_ldo_volts,
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.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),
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.n_voltages = BD70528_LDO_VOLTS,
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.enable_reg = BD70528_REG_LDO2_EN,
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.enable_mask = BD70528_MASK_RUN_EN,
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.vsel_reg = BD70528_REG_LDO2_VOLT,
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.vsel_mask = BD70528_MASK_LDO_VOLT,
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.owner = THIS_MODULE,
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},
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{
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.name = "ldo3",
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.of_match = of_match_ptr("LDO3"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD70528_LDO3,
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.ops = &bd70528_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.linear_ranges = bd70528_ldo_volts,
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.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),
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.n_voltages = BD70528_LDO_VOLTS,
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.enable_reg = BD70528_REG_LDO3_EN,
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.enable_mask = BD70528_MASK_RUN_EN,
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.vsel_reg = BD70528_REG_LDO3_VOLT,
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.vsel_mask = BD70528_MASK_LDO_VOLT,
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.owner = THIS_MODULE,
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},
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{
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.name = "ldo_led1",
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.of_match = of_match_ptr("LDO_LED1"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD70528_LED1,
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.ops = &bd70528_led_ops,
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.type = REGULATOR_VOLTAGE,
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.volt_table = &led_volts[0],
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.n_voltages = ARRAY_SIZE(led_volts),
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.enable_reg = BD70528_REG_LED_EN,
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.enable_mask = BD70528_MASK_LED1_EN,
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.vsel_reg = BD70528_REG_LED_VOLT,
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.vsel_mask = BD70528_MASK_LED1_VOLT,
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.owner = THIS_MODULE,
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},
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{
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.name = "ldo_led2",
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.of_match = of_match_ptr("LDO_LED2"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD70528_LED2,
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.ops = &bd70528_led_ops,
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.type = REGULATOR_VOLTAGE,
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.volt_table = &led_volts[0],
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.n_voltages = ARRAY_SIZE(led_volts),
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.enable_reg = BD70528_REG_LED_EN,
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.enable_mask = BD70528_MASK_LED2_EN,
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.vsel_reg = BD70528_REG_LED_VOLT,
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.vsel_mask = BD70528_MASK_LED2_VOLT,
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.owner = THIS_MODULE,
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},
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};
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static int bd70528_probe(struct platform_device *pdev)
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{
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struct rohm_regmap_dev *bd70528;
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int i;
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struct regulator_config config = {
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.dev = pdev->dev.parent,
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};
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bd70528 = dev_get_drvdata(pdev->dev.parent);
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if (!bd70528) {
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dev_err(&pdev->dev, "No MFD driver data\n");
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return -EINVAL;
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}
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config.regmap = bd70528->regmap;
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for (i = 0; i < ARRAY_SIZE(bd70528_desc); i++) {
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struct regulator_dev *rdev;
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rdev = devm_regulator_register(&pdev->dev, &bd70528_desc[i],
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&config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev,
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"failed to register %s regulator\n",
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bd70528_desc[i].name);
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return PTR_ERR(rdev);
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}
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}
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return 0;
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}
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static struct platform_driver bd70528_regulator = {
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.driver = {
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.name = "bd70528-pmic"
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},
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.probe = bd70528_probe,
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};
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module_platform_driver(bd70528_regulator);
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MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
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MODULE_DESCRIPTION("BD70528 voltage regulator driver");
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MODULE_LICENSE("GPL");
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