327 lines
9.7 KiB
C
327 lines
9.7 KiB
C
/*
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* Copyright (c) 2023 Grinn
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT maxim_max20335_regulator
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#include <zephyr/drivers/i2c.h>
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#include <zephyr/drivers/regulator.h>
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#include <zephyr/dt-bindings/regulator/max20335.h>
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#include <zephyr/kernel.h>
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#include <zephyr/sys/linear_range.h>
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#define MAX20335_BUCK1_CFG 0x0DU
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#define MAX20335_BUCK1_VSET 0x0EU
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#define MAX20335_BUCK2_CFG 0x0FU
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#define MAX20335_BUCK2_VSET 0x10U
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#define MAX20335_BUCK12_CSET 0x11U
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#define MAX20335_BUCK1_CSET_MASK 0xF0U
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#define MAX20335_BUCK2_CSET_MASK 0x0FU
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#define MAX20335_BUCK2_CSET_SHIFT 4
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#define MAX20335_BUCK_EN BIT(3)
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#define MAX20335_BUCK_EN_MASK GENMASK(4, 3)
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#define MAX20335_LDO1_CFG 0x12U
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#define MAX20335_LDO1_VSET 0x13U
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#define MAX20335_LDO2_CFG 0x14U
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#define MAX20335_LDO2_VSET 0x15U
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#define MAX20335_LDO3_CFG 0x16U
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#define MAX20335_LDO3_VSET 0x17U
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#define MAX20335_LDO_MODE_MASK BIT(0)
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#define MAX20335_LDO_EN BIT(1)
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#define MAX20335_LDO_EN_MASK GENMASK(2, 1)
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enum max20335_pmic_sources {
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MAX20335_PMIC_SOURCE_BUCK1,
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MAX20335_PMIC_SOURCE_BUCK2,
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MAX20335_PMIC_SOURCE_LDO1,
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MAX20335_PMIC_SOURCE_LDO2,
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MAX20335_PMIC_SOURCE_LDO3,
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};
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struct regulator_max20335_desc {
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uint8_t vsel_reg;
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uint8_t enable_mask;
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uint8_t enable_val;
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uint8_t cfg_reg;
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const struct linear_range *uv_range;
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const struct linear_range *ua_range;
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};
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struct regulator_max20335_config {
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struct regulator_common_config common;
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struct i2c_dt_spec bus;
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const struct regulator_max20335_desc *desc;
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uint8_t source;
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};
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struct regulator_max20335_data {
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struct regulator_common_data common;
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};
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static const struct linear_range buck1_range = LINEAR_RANGE_INIT(700000, 25000U, 0x0U, 0x3FU);
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static const struct linear_range buck2_range = LINEAR_RANGE_INIT(700000, 50000U, 0x0U, 0x3FU);
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static const struct linear_range buck12_current_limit_range =
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LINEAR_RANGE_INIT(50000, 25000U, 0x02U, 0x0FU);
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static const struct linear_range ldo1_range = LINEAR_RANGE_INIT(800000, 100000U, 0x0U, 0x1CU);
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static const struct linear_range ldo23_range = LINEAR_RANGE_INIT(900000, 100000U, 0x0U, 0x1FU);
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static const struct regulator_max20335_desc buck1_desc = {
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.vsel_reg = MAX20335_BUCK1_VSET,
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.enable_mask = MAX20335_BUCK_EN_MASK,
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.enable_val = MAX20335_BUCK_EN,
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.cfg_reg = MAX20335_BUCK1_CFG,
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.uv_range = &buck1_range,
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.ua_range = &buck12_current_limit_range,
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};
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static const struct regulator_max20335_desc buck2_desc = {
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.vsel_reg = MAX20335_BUCK2_VSET,
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.enable_mask = MAX20335_BUCK_EN_MASK,
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.enable_val = MAX20335_BUCK_EN,
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.cfg_reg = MAX20335_BUCK2_CFG,
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.uv_range = &buck2_range,
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.ua_range = &buck12_current_limit_range,
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};
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static const struct regulator_max20335_desc ldo1_desc = {
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.vsel_reg = MAX20335_LDO1_VSET,
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.enable_mask = MAX20335_LDO_EN_MASK,
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.enable_val = MAX20335_LDO_EN,
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.cfg_reg = MAX20335_LDO1_CFG,
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.uv_range = &ldo1_range,
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};
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static const struct regulator_max20335_desc ldo2_desc = {
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.vsel_reg = MAX20335_LDO2_VSET,
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.enable_mask = MAX20335_LDO_EN_MASK,
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.enable_val = MAX20335_LDO_EN,
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.cfg_reg = MAX20335_LDO2_CFG,
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.uv_range = &ldo23_range,
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};
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static const struct regulator_max20335_desc ldo3_desc = {
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.vsel_reg = MAX20335_LDO3_VSET,
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.enable_mask = MAX20335_LDO_EN_MASK,
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.enable_val = MAX20335_LDO_EN,
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.cfg_reg = MAX20335_LDO3_CFG,
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.uv_range = &ldo23_range,
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};
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static int regulator_max20335_set_enable(const struct device *dev, bool enable)
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{
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const struct regulator_max20335_config *config = dev->config;
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return i2c_reg_update_byte_dt(&config->bus,
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config->desc->cfg_reg,
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config->desc->enable_mask,
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enable ? config->desc->enable_val : 0);
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}
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static int regulator_max20335_enable(const struct device *dev)
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{
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return regulator_max20335_set_enable(dev, true);
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}
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static int regulator_max20335_disable(const struct device *dev)
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{
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return regulator_max20335_set_enable(dev, false);
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}
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static int regulator_max20335_set_mode(const struct device *dev, regulator_mode_t mode)
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{
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const struct regulator_max20335_config *config = dev->config;
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if (mode > MAX20335_LOAD_SWITCH_MODE) {
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return -ENOTSUP;
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}
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switch (config->source) {
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case MAX20335_PMIC_SOURCE_LDO1:
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__fallthrough;
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case MAX20335_PMIC_SOURCE_LDO2:
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__fallthrough;
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case MAX20335_PMIC_SOURCE_LDO3:
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return i2c_reg_update_byte_dt(&config->bus,
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config->desc->cfg_reg,
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MAX20335_LDO_MODE_MASK,
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mode);
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default:
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return -ENOTSUP;
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}
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}
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static unsigned int regulator_max20335_count_voltages(const struct device *dev)
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{
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const struct regulator_max20335_config *config = dev->config;
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return linear_range_values_count(config->desc->uv_range);
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}
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static int regulator_max20335_list_voltage(const struct device *dev, unsigned int idx,
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int32_t *volt_uv)
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{
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const struct regulator_max20335_config *config = dev->config;
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return linear_range_get_value(config->desc->uv_range, idx, volt_uv);
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}
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static int regulator_max20335_set_buck_ldo_voltage(const struct device *dev, int32_t min_uv,
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int32_t max_uv, const struct linear_range *range,
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uint8_t vout_reg)
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{
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const struct regulator_max20335_config *config = dev->config;
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uint16_t idx;
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int ret;
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ret = linear_range_get_win_index(range, min_uv, max_uv, &idx);
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if (ret == -EINVAL) {
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return ret;
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}
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return i2c_reg_write_byte_dt(&config->bus, vout_reg, (uint8_t)idx);
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}
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static int regulator_max20335_buck12_ldo123_get_voltage(const struct device *dev,
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const struct linear_range *range,
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uint8_t vout_reg, int32_t *volt_uv)
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{
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const struct regulator_max20335_config *config = dev->config;
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uint8_t idx;
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int ret;
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ret = i2c_reg_read_byte_dt(&config->bus, vout_reg, &idx);
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if (ret < 0) {
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return ret;
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}
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return linear_range_get_value(range, idx, volt_uv);
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}
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static int regulator_max20335_get_voltage(const struct device *dev, int32_t *volt_uv)
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{
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const struct regulator_max20335_config *config = dev->config;
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return regulator_max20335_buck12_ldo123_get_voltage(dev,
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config->desc->uv_range,
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config->desc->vsel_reg,
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volt_uv);
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}
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static int regulator_max20335_set_voltage(const struct device *dev, int32_t min_uv, int32_t max_uv)
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{
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const struct regulator_max20335_config *config = dev->config;
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return regulator_max20335_set_buck_ldo_voltage(dev,
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min_uv,
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max_uv,
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config->desc->uv_range,
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config->desc->vsel_reg);
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}
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static unsigned int regulator_max20335_count_current_limits(const struct device *dev)
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{
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const struct regulator_max20335_config *config = dev->config;
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return linear_range_values_count(config->desc->ua_range);
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}
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static int regulator_max20335_list_current_limit(const struct device *dev, unsigned int idx,
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int32_t *current_ua)
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{
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const struct regulator_max20335_config *config = dev->config;
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return linear_range_get_value(config->desc->ua_range, idx, current_ua);
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}
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static int regulator_max20335_set_current_limit(const struct device *dev,
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int32_t min_ua,
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int32_t max_ua)
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{
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const struct regulator_max20335_config *config = dev->config;
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uint8_t val;
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uint16_t idx;
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int ret;
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ret = i2c_reg_read_byte_dt(&config->bus, MAX20335_BUCK12_CSET, &val);
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if (ret < 0) {
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return ret;
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}
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ret = linear_range_get_win_index(config->desc->ua_range, min_ua, max_ua, &idx);
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if (ret == -EINVAL) {
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return ret;
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}
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switch (config->source) {
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case MAX20335_PMIC_SOURCE_BUCK1:
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val = idx | (val & MAX20335_BUCK1_CSET_MASK);
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break;
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case MAX20335_PMIC_SOURCE_BUCK2:
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val = (idx << MAX20335_BUCK2_CSET_SHIFT) | (val & MAX20335_BUCK2_CSET_MASK);
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break;
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default:
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return -ENOTSUP;
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}
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return i2c_reg_write_byte_dt(&config->bus, MAX20335_BUCK12_CSET, val);
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}
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static int regulator_max20335_init(const struct device *dev)
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{
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const struct regulator_max20335_config *config = dev->config;
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if (!i2c_is_ready_dt(&config->bus)) {
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return -ENODEV;
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}
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regulator_common_data_init(dev);
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return regulator_common_init(dev, false);
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}
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static const struct regulator_driver_api api = {
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.enable = regulator_max20335_enable,
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.disable = regulator_max20335_disable,
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.set_mode = regulator_max20335_set_mode,
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.count_voltages = regulator_max20335_count_voltages,
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.list_voltage = regulator_max20335_list_voltage,
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.set_voltage = regulator_max20335_set_voltage,
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.get_voltage = regulator_max20335_get_voltage,
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.count_current_limits = regulator_max20335_count_current_limits,
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.list_current_limit = regulator_max20335_list_current_limit,
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.set_current_limit = regulator_max20335_set_current_limit,
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};
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#define REGULATOR_MAX20335_DEFINE(node_id, id, child_name, _source) \
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static const struct regulator_max20335_config regulator_max20335_config_##id = { \
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.common = REGULATOR_DT_COMMON_CONFIG_INIT(node_id), \
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.bus = I2C_DT_SPEC_GET(DT_GPARENT(node_id)), \
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.desc = &child_name##_desc, \
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.source = _source, \
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}; \
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\
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static struct regulator_max20335_data regulator_max20335_data_##id; \
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DEVICE_DT_DEFINE(node_id, regulator_max20335_init, NULL, \
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®ulator_max20335_data_##id, \
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®ulator_max20335_config_##id, \
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POST_KERNEL, \
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CONFIG_REGULATOR_MAXIM_MAX20335_INIT_PRIORITY, \
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&api);
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#define REGULATOR_MAX20335_DEFINE_COND(inst, child, source) \
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COND_CODE_1(DT_NODE_EXISTS(DT_INST_CHILD(inst, child)), \
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(REGULATOR_MAX20335_DEFINE(DT_INST_CHILD(inst, child), \
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child##inst, child, source)), \
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())
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#define REGULATOR_MAX20335_DEFINE_ALL(inst) \
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REGULATOR_MAX20335_DEFINE_COND(inst, buck1, MAX20335_PMIC_SOURCE_BUCK1) \
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REGULATOR_MAX20335_DEFINE_COND(inst, buck2, MAX20335_PMIC_SOURCE_BUCK2) \
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REGULATOR_MAX20335_DEFINE_COND(inst, ldo1, MAX20335_PMIC_SOURCE_LDO1) \
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REGULATOR_MAX20335_DEFINE_COND(inst, ldo2, MAX20335_PMIC_SOURCE_LDO2) \
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REGULATOR_MAX20335_DEFINE_COND(inst, ldo3, MAX20335_PMIC_SOURCE_LDO3)
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DT_INST_FOREACH_STATUS_OKAY(REGULATOR_MAX20335_DEFINE_ALL);
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