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301 lines
7.9 KiB
301 lines
7.9 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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// |
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// max77826-regulator.c - regulator driver for Maxim MAX77826 |
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// |
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// Author: Iskren Chernev <[email protected]> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/err.h> |
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#include <linux/of.h> |
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#include <linux/of_device.h> |
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#include <linux/platform_device.h> |
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#include <linux/regulator/driver.h> |
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#include <linux/regulator/of_regulator.h> |
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#include <linux/i2c.h> |
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#include <linux/regmap.h> |
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enum max77826_registers { |
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MAX77826_REG_INT_SRC = 0x00, |
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MAX77826_REG_SYS_INT, |
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MAX77826_REG_INT1, |
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MAX77826_REG_INT2, |
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MAX77826_REG_BB_INT, |
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MAX77826_REG_INT_SRC_M, |
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MAX77826_REG_TOPSYS_INT_M, |
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MAX77826_REG_INT1_M, |
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MAX77826_REG_INT2_M, |
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MAX77826_REG_BB_INT_M, |
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MAX77826_REG_TOPSYS_STAT, |
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MAX77826_REG_STAT1, |
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MAX77826_REG_STAT2, |
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MAX77826_REG_BB_STAT, |
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/* 0x0E - 0x0F: Reserved */ |
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MAX77826_REG_LDO_OPMD1 = 0x10, |
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MAX77826_REG_LDO_OPMD2, |
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MAX77826_REG_LDO_OPMD3, |
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MAX77826_REG_LDO_OPMD4, |
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MAX77826_REG_B_BB_OPMD, |
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/* 0x15 - 0x1F: Reserved */ |
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MAX77826_REG_LDO1_CFG = 0x20, |
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MAX77826_REG_LDO2_CFG, |
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MAX77826_REG_LDO3_CFG, |
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MAX77826_REG_LDO4_CFG, |
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MAX77826_REG_LDO5_CFG, |
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MAX77826_REG_LDO6_CFG, |
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MAX77826_REG_LDO7_CFG, |
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MAX77826_REG_LDO8_CFG, |
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MAX77826_REG_LDO9_CFG, |
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MAX77826_REG_LDO10_CFG, |
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MAX77826_REG_LDO11_CFG, |
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MAX77826_REG_LDO12_CFG, |
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MAX77826_REG_LDO13_CFG, |
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MAX77826_REG_LDO14_CFG, |
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MAX77826_REG_LDO15_CFG, |
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/* 0x2F: Reserved */ |
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MAX77826_REG_BUCK_CFG = 0x30, |
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MAX77826_REG_BUCK_VOUT, |
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MAX77826_REG_BB_CFG, |
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MAX77826_REG_BB_VOUT, |
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/* 0x34 - 0x3F: Reserved */ |
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MAX77826_REG_BUCK_SS_FREQ = 0x40, |
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MAX77826_REG_UVLO_FALL, |
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/* 0x42 - 0xCE: Reserved */ |
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MAX77826_REG_DEVICE_ID = 0xCF, |
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}; |
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enum max77826_regulators { |
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MAX77826_LDO1 = 0, |
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MAX77826_LDO2, |
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MAX77826_LDO3, |
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MAX77826_LDO4, |
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MAX77826_LDO5, |
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MAX77826_LDO6, |
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MAX77826_LDO7, |
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MAX77826_LDO8, |
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MAX77826_LDO9, |
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MAX77826_LDO10, |
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MAX77826_LDO11, |
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MAX77826_LDO12, |
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MAX77826_LDO13, |
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MAX77826_LDO14, |
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MAX77826_LDO15, |
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MAX77826_BUCK, |
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MAX77826_BUCKBOOST, |
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MAX77826_MAX_REGULATORS, |
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}; |
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#define MAX77826_MASK_LDO 0x7f |
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#define MAX77826_MASK_BUCK 0xff |
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#define MAX77826_MASK_BUCKBOOST 0x7f |
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#define MAX77826_BUCK_RAMP_DELAY 12500 |
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/* values in mV */ |
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/* for LDO1-3 */ |
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#define MAX77826_NMOS_LDO_VOLT_MIN 600000 |
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#define MAX77826_NMOS_LDO_VOLT_MAX 2187500 |
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#define MAX77826_NMOS_LDO_VOLT_STEP 12500 |
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/* for LDO4-15 */ |
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#define MAX77826_PMOS_LDO_VOLT_MIN 800000 |
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#define MAX77826_PMOS_LDO_VOLT_MAX 3975000 |
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#define MAX77826_PMOS_LDO_VOLT_STEP 25000 |
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/* for BUCK */ |
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#define MAX77826_BUCK_VOLT_MIN 500000 |
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#define MAX77826_BUCK_VOLT_MAX 1800000 |
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#define MAX77826_BUCK_VOLT_STEP 6250 |
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/* for BUCKBOOST */ |
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#define MAX77826_BUCKBOOST_VOLT_MIN 2600000 |
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#define MAX77826_BUCKBOOST_VOLT_MAX 4187500 |
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#define MAX77826_BUCKBOOST_VOLT_STEP 12500 |
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#define MAX77826_VOLT_RANGE(_type) \ |
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((MAX77826_ ## _type ## _VOLT_MAX - \ |
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MAX77826_ ## _type ## _VOLT_MIN) / \ |
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MAX77826_ ## _type ## _VOLT_STEP + 1) |
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#define MAX77826_LDO(_id, _type) \ |
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[MAX77826_LDO ## _id] = { \ |
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.id = MAX77826_LDO ## _id, \ |
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.name = "LDO"#_id, \ |
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.of_match = of_match_ptr("LDO"#_id), \ |
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.regulators_node = "regulators", \ |
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.ops = &max77826_most_ops, \ |
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.min_uV = MAX77826_ ## _type ## _LDO_VOLT_MIN, \ |
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.uV_step = MAX77826_ ## _type ## _LDO_VOLT_STEP, \ |
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.n_voltages = MAX77826_VOLT_RANGE(_type ## _LDO), \ |
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.enable_reg = MAX77826_REG_LDO_OPMD1 + (_id - 1) / 4, \ |
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.enable_mask = BIT(((_id - 1) % 4) * 2 + 1), \ |
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.vsel_reg = MAX77826_REG_LDO1_CFG + (_id - 1), \ |
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.vsel_mask = MAX77826_MASK_LDO, \ |
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.owner = THIS_MODULE, \ |
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} |
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#define MAX77826_BUCK(_idx, _id, _ops) \ |
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[MAX77826_ ## _id] = { \ |
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.id = MAX77826_ ## _id, \ |
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.name = #_id, \ |
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.of_match = of_match_ptr(#_id), \ |
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.regulators_node = "regulators", \ |
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.ops = &_ops, \ |
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.min_uV = MAX77826_ ## _id ## _VOLT_MIN, \ |
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.uV_step = MAX77826_ ## _id ## _VOLT_STEP, \ |
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.n_voltages = MAX77826_VOLT_RANGE(_id), \ |
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.enable_reg = MAX77826_REG_B_BB_OPMD, \ |
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.enable_mask = BIT(_idx * 2 + 1), \ |
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.vsel_reg = MAX77826_REG_BUCK_VOUT + _idx * 2, \ |
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.vsel_mask = MAX77826_MASK_ ## _id, \ |
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.owner = THIS_MODULE, \ |
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} |
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struct max77826_regulator_info { |
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struct regmap *regmap; |
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struct regulator_desc *rdesc; |
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}; |
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static const struct regmap_config max77826_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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.max_register = MAX77826_REG_DEVICE_ID, |
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}; |
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static int max77826_set_voltage_time_sel(struct regulator_dev *, |
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unsigned int old_selector, |
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unsigned int new_selector); |
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static const struct regulator_ops max77826_most_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, |
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.map_voltage = regulator_map_voltage_linear, |
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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.set_voltage_sel = regulator_set_voltage_sel_regmap, |
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}; |
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static const struct regulator_ops max77826_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, |
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.map_voltage = regulator_map_voltage_linear, |
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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.set_voltage_sel = regulator_set_voltage_sel_regmap, |
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.set_voltage_time_sel = max77826_set_voltage_time_sel, |
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}; |
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static struct regulator_desc max77826_regulators_desc[] = { |
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MAX77826_LDO(1, NMOS), |
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MAX77826_LDO(2, NMOS), |
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MAX77826_LDO(3, NMOS), |
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MAX77826_LDO(4, PMOS), |
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MAX77826_LDO(5, PMOS), |
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MAX77826_LDO(6, PMOS), |
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MAX77826_LDO(7, PMOS), |
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MAX77826_LDO(8, PMOS), |
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MAX77826_LDO(9, PMOS), |
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MAX77826_LDO(10, PMOS), |
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MAX77826_LDO(11, PMOS), |
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MAX77826_LDO(12, PMOS), |
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MAX77826_LDO(13, PMOS), |
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MAX77826_LDO(14, PMOS), |
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MAX77826_LDO(15, PMOS), |
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MAX77826_BUCK(0, BUCK, max77826_buck_ops), |
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MAX77826_BUCK(1, BUCKBOOST, max77826_most_ops), |
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}; |
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static int max77826_set_voltage_time_sel(struct regulator_dev *rdev, |
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unsigned int old_selector, |
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unsigned int new_selector) |
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{ |
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if (new_selector > old_selector) { |
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return DIV_ROUND_UP(MAX77826_BUCK_VOLT_STEP * |
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(new_selector - old_selector), |
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MAX77826_BUCK_RAMP_DELAY); |
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} |
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return 0; |
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} |
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static int max77826_read_device_id(struct regmap *regmap, struct device *dev) |
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{ |
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unsigned int device_id; |
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int res; |
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res = regmap_read(regmap, MAX77826_REG_DEVICE_ID, &device_id); |
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if (!res) |
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dev_dbg(dev, "DEVICE_ID: 0x%x\n", device_id); |
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return res; |
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} |
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static int max77826_i2c_probe(struct i2c_client *client) |
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{ |
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struct device *dev = &client->dev; |
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struct max77826_regulator_info *info; |
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struct regulator_config config = {}; |
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struct regulator_dev *rdev; |
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struct regmap *regmap; |
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int i; |
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info = devm_kzalloc(dev, sizeof(struct max77826_regulator_info), |
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GFP_KERNEL); |
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if (!info) |
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return -ENOMEM; |
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info->rdesc = max77826_regulators_desc; |
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regmap = devm_regmap_init_i2c(client, &max77826_regmap_config); |
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if (IS_ERR(regmap)) { |
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dev_err(dev, "Failed to allocate regmap!\n"); |
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return PTR_ERR(regmap); |
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} |
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info->regmap = regmap; |
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i2c_set_clientdata(client, info); |
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config.dev = dev; |
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config.regmap = regmap; |
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config.driver_data = info; |
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for (i = 0; i < MAX77826_MAX_REGULATORS; i++) { |
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rdev = devm_regulator_register(dev, |
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&max77826_regulators_desc[i], |
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&config); |
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if (IS_ERR(rdev)) { |
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dev_err(dev, "Failed to register regulator!\n"); |
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return PTR_ERR(rdev); |
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} |
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} |
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return max77826_read_device_id(regmap, dev); |
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} |
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static const struct of_device_id __maybe_unused max77826_of_match[] = { |
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{ .compatible = "maxim,max77826" }, |
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{ /* sentinel */ } |
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}; |
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MODULE_DEVICE_TABLE(of, max77826_of_match); |
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static const struct i2c_device_id max77826_id[] = { |
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{ "max77826-regulator" }, |
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{ /* sentinel */ } |
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}; |
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MODULE_DEVICE_TABLE(i2c, max77826_id); |
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static struct i2c_driver max77826_regulator_driver = { |
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.driver = { |
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.name = "max77826", |
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.of_match_table = of_match_ptr(max77826_of_match), |
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}, |
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.probe_new = max77826_i2c_probe, |
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.id_table = max77826_id, |
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}; |
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module_i2c_driver(max77826_regulator_driver); |
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MODULE_AUTHOR("Iskren Chernev <[email protected]>"); |
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MODULE_DESCRIPTION("MAX77826 PMIC regulator driver"); |
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MODULE_LICENSE("GPL");
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