408 lines
13 KiB
C
408 lines
13 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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//
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// Copyright (C) 2018 BayLibre SAS
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// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
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//
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// Regulator driver for MAXIM 77650/77651 charger/power-supply.
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#include <linux/of.h>
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#include <linux/mfd/max77650.h>
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#include <linux/module.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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#define MAX77650_REGULATOR_EN_CTRL_MASK GENMASK(3, 0)
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#define MAX77650_REGULATOR_EN_CTRL_BITS(_reg) \
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((_reg) & MAX77650_REGULATOR_EN_CTRL_MASK)
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#define MAX77650_REGULATOR_ENABLED GENMASK(2, 1)
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#define MAX77650_REGULATOR_DISABLED BIT(2)
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#define MAX77650_REGULATOR_V_LDO_MASK GENMASK(6, 0)
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#define MAX77650_REGULATOR_V_SBB_MASK GENMASK(5, 0)
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#define MAX77651_REGULATOR_V_SBB1_MASK GENMASK(5, 2)
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#define MAX77651_REGULATOR_V_SBB1_RANGE_MASK GENMASK(1, 0)
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#define MAX77650_REGULATOR_AD_MASK BIT(3)
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#define MAX77650_REGULATOR_AD_DISABLED 0x00
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#define MAX77650_REGULATOR_AD_ENABLED BIT(3)
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#define MAX77650_REGULATOR_CURR_LIM_MASK GENMASK(7, 6)
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enum {
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MAX77650_REGULATOR_ID_LDO = 0,
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MAX77650_REGULATOR_ID_SBB0,
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MAX77650_REGULATOR_ID_SBB1,
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MAX77650_REGULATOR_ID_SBB2,
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MAX77650_REGULATOR_NUM_REGULATORS,
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};
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struct max77650_regulator_desc {
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struct regulator_desc desc;
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unsigned int regA;
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unsigned int regB;
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};
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static struct max77650_regulator_desc max77651_SBB1_desc;
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static const unsigned int max77651_sbb1_volt_range_sel[] = {
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0x0, 0x1, 0x2, 0x3
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};
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static const struct linear_range max77651_sbb1_volt_ranges[] = {
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/* range index 0 */
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REGULATOR_LINEAR_RANGE(2400000, 0x00, 0x0f, 50000),
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/* range index 1 */
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REGULATOR_LINEAR_RANGE(3200000, 0x00, 0x0f, 50000),
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/* range index 2 */
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REGULATOR_LINEAR_RANGE(4000000, 0x00, 0x0f, 50000),
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/* range index 3 */
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REGULATOR_LINEAR_RANGE(4800000, 0x00, 0x09, 50000),
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};
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static const unsigned int max77650_current_limit_table[] = {
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1000000, 866000, 707000, 500000,
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};
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static int max77650_regulator_is_enabled(struct regulator_dev *rdev)
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{
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struct max77650_regulator_desc *rdesc;
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struct regmap *map;
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int val, rv, en;
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rdesc = rdev_get_drvdata(rdev);
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map = rdev_get_regmap(rdev);
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rv = regmap_read(map, rdesc->regB, &val);
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if (rv)
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return rv;
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en = MAX77650_REGULATOR_EN_CTRL_BITS(val);
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return en != MAX77650_REGULATOR_DISABLED;
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}
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static int max77650_regulator_enable(struct regulator_dev *rdev)
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{
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struct max77650_regulator_desc *rdesc;
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struct regmap *map;
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rdesc = rdev_get_drvdata(rdev);
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map = rdev_get_regmap(rdev);
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return regmap_update_bits(map, rdesc->regB,
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MAX77650_REGULATOR_EN_CTRL_MASK,
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MAX77650_REGULATOR_ENABLED);
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}
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static int max77650_regulator_disable(struct regulator_dev *rdev)
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{
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struct max77650_regulator_desc *rdesc;
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struct regmap *map;
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rdesc = rdev_get_drvdata(rdev);
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map = rdev_get_regmap(rdev);
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return regmap_update_bits(map, rdesc->regB,
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MAX77650_REGULATOR_EN_CTRL_MASK,
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MAX77650_REGULATOR_DISABLED);
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}
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static const struct regulator_ops max77650_regulator_LDO_ops = {
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.is_enabled = max77650_regulator_is_enabled,
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.enable = max77650_regulator_enable,
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.disable = max77650_regulator_disable,
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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_active_discharge = regulator_set_active_discharge_regmap,
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};
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static const struct regulator_ops max77650_regulator_SBB_ops = {
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.is_enabled = max77650_regulator_is_enabled,
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.enable = max77650_regulator_enable,
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.disable = max77650_regulator_disable,
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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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.get_current_limit = regulator_get_current_limit_regmap,
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.set_current_limit = regulator_set_current_limit_regmap,
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.set_active_discharge = regulator_set_active_discharge_regmap,
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};
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/* Special case for max77651 SBB1 - pickable linear-range voltage mapping. */
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static const struct regulator_ops max77651_SBB1_regulator_ops = {
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.is_enabled = max77650_regulator_is_enabled,
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.enable = max77650_regulator_enable,
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.disable = max77650_regulator_disable,
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.list_voltage = regulator_list_voltage_pickable_linear_range,
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.get_voltage_sel = regulator_get_voltage_sel_pickable_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_pickable_regmap,
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.get_current_limit = regulator_get_current_limit_regmap,
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.set_current_limit = regulator_set_current_limit_regmap,
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.set_active_discharge = regulator_set_active_discharge_regmap,
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};
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static struct max77650_regulator_desc max77650_LDO_desc = {
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.desc = {
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.name = "ldo",
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.of_match = of_match_ptr("ldo"),
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.regulators_node = of_match_ptr("regulators"),
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.supply_name = "in-ldo",
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.id = MAX77650_REGULATOR_ID_LDO,
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.ops = &max77650_regulator_LDO_ops,
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.min_uV = 1350000,
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.uV_step = 12500,
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.n_voltages = 128,
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.vsel_step = 1,
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.vsel_mask = MAX77650_REGULATOR_V_LDO_MASK,
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.vsel_reg = MAX77650_REG_CNFG_LDO_A,
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.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
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.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
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.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
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.active_discharge_reg = MAX77650_REG_CNFG_LDO_B,
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.enable_time = 100,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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},
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.regA = MAX77650_REG_CNFG_LDO_A,
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.regB = MAX77650_REG_CNFG_LDO_B,
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};
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static struct max77650_regulator_desc max77650_SBB0_desc = {
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.desc = {
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.name = "sbb0",
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.of_match = of_match_ptr("sbb0"),
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.regulators_node = of_match_ptr("regulators"),
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.supply_name = "in-sbb0",
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.id = MAX77650_REGULATOR_ID_SBB0,
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.ops = &max77650_regulator_SBB_ops,
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.min_uV = 800000,
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.uV_step = 25000,
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.n_voltages = 64,
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.vsel_step = 1,
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.vsel_mask = MAX77650_REGULATOR_V_SBB_MASK,
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.vsel_reg = MAX77650_REG_CNFG_SBB0_A,
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.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
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.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
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.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
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.active_discharge_reg = MAX77650_REG_CNFG_SBB0_B,
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.enable_time = 100,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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.csel_reg = MAX77650_REG_CNFG_SBB0_A,
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.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
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.curr_table = max77650_current_limit_table,
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.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
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},
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.regA = MAX77650_REG_CNFG_SBB0_A,
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.regB = MAX77650_REG_CNFG_SBB0_B,
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};
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static struct max77650_regulator_desc max77650_SBB1_desc = {
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.desc = {
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.name = "sbb1",
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.of_match = of_match_ptr("sbb1"),
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.regulators_node = of_match_ptr("regulators"),
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.supply_name = "in-sbb1",
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.id = MAX77650_REGULATOR_ID_SBB1,
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.ops = &max77650_regulator_SBB_ops,
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.min_uV = 800000,
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.uV_step = 12500,
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.n_voltages = 64,
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.vsel_step = 1,
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.vsel_mask = MAX77650_REGULATOR_V_SBB_MASK,
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.vsel_reg = MAX77650_REG_CNFG_SBB1_A,
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.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
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.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
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.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
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.active_discharge_reg = MAX77650_REG_CNFG_SBB1_B,
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.enable_time = 100,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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.csel_reg = MAX77650_REG_CNFG_SBB1_A,
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.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
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.curr_table = max77650_current_limit_table,
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.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
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},
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.regA = MAX77650_REG_CNFG_SBB1_A,
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.regB = MAX77650_REG_CNFG_SBB1_B,
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};
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static struct max77650_regulator_desc max77651_SBB1_desc = {
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.desc = {
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.name = "sbb1",
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.of_match = of_match_ptr("sbb1"),
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.regulators_node = of_match_ptr("regulators"),
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.supply_name = "in-sbb1",
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.id = MAX77650_REGULATOR_ID_SBB1,
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.ops = &max77651_SBB1_regulator_ops,
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.linear_range_selectors = max77651_sbb1_volt_range_sel,
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.linear_ranges = max77651_sbb1_volt_ranges,
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.n_linear_ranges = ARRAY_SIZE(max77651_sbb1_volt_ranges),
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.n_voltages = 58,
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.vsel_step = 1,
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.vsel_range_mask = MAX77651_REGULATOR_V_SBB1_RANGE_MASK,
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.vsel_range_reg = MAX77650_REG_CNFG_SBB1_A,
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.vsel_mask = MAX77651_REGULATOR_V_SBB1_MASK,
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.vsel_reg = MAX77650_REG_CNFG_SBB1_A,
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.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
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.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
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.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
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.active_discharge_reg = MAX77650_REG_CNFG_SBB1_B,
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.enable_time = 100,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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.csel_reg = MAX77650_REG_CNFG_SBB1_A,
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.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
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.curr_table = max77650_current_limit_table,
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.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
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},
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.regA = MAX77650_REG_CNFG_SBB1_A,
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.regB = MAX77650_REG_CNFG_SBB1_B,
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};
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static struct max77650_regulator_desc max77650_SBB2_desc = {
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.desc = {
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.name = "sbb2",
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.of_match = of_match_ptr("sbb2"),
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.regulators_node = of_match_ptr("regulators"),
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.supply_name = "in-sbb0",
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.id = MAX77650_REGULATOR_ID_SBB2,
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.ops = &max77650_regulator_SBB_ops,
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.min_uV = 800000,
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.uV_step = 50000,
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.n_voltages = 64,
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.vsel_step = 1,
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.vsel_mask = MAX77650_REGULATOR_V_SBB_MASK,
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.vsel_reg = MAX77650_REG_CNFG_SBB2_A,
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.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
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.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
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.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
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.active_discharge_reg = MAX77650_REG_CNFG_SBB2_B,
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.enable_time = 100,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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.csel_reg = MAX77650_REG_CNFG_SBB2_A,
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.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
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.curr_table = max77650_current_limit_table,
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.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
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},
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.regA = MAX77650_REG_CNFG_SBB2_A,
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.regB = MAX77650_REG_CNFG_SBB2_B,
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};
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static struct max77650_regulator_desc max77651_SBB2_desc = {
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.desc = {
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.name = "sbb2",
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.of_match = of_match_ptr("sbb2"),
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.regulators_node = of_match_ptr("regulators"),
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.supply_name = "in-sbb0",
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.id = MAX77650_REGULATOR_ID_SBB2,
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.ops = &max77650_regulator_SBB_ops,
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.min_uV = 2400000,
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.uV_step = 50000,
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.n_voltages = 64,
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.vsel_step = 1,
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.vsel_mask = MAX77650_REGULATOR_V_SBB_MASK,
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.vsel_reg = MAX77650_REG_CNFG_SBB2_A,
|
||
|
|
.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
|
||
|
|
.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
|
||
|
|
.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
|
||
|
|
.active_discharge_reg = MAX77650_REG_CNFG_SBB2_B,
|
||
|
|
.enable_time = 100,
|
||
|
|
.type = REGULATOR_VOLTAGE,
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.csel_reg = MAX77650_REG_CNFG_SBB2_A,
|
||
|
|
.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
|
||
|
|
.curr_table = max77650_current_limit_table,
|
||
|
|
.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
|
||
|
|
},
|
||
|
|
.regA = MAX77650_REG_CNFG_SBB2_A,
|
||
|
|
.regB = MAX77650_REG_CNFG_SBB2_B,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int max77650_regulator_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct max77650_regulator_desc **rdescs;
|
||
|
|
struct max77650_regulator_desc *rdesc;
|
||
|
|
struct regulator_config config = { };
|
||
|
|
struct device *dev, *parent;
|
||
|
|
struct regulator_dev *rdev;
|
||
|
|
struct regmap *map;
|
||
|
|
unsigned int val;
|
||
|
|
int i, rv;
|
||
|
|
|
||
|
|
dev = &pdev->dev;
|
||
|
|
parent = dev->parent;
|
||
|
|
|
||
|
|
if (!dev->of_node)
|
||
|
|
dev->of_node = parent->of_node;
|
||
|
|
|
||
|
|
rdescs = devm_kcalloc(dev, MAX77650_REGULATOR_NUM_REGULATORS,
|
||
|
|
sizeof(*rdescs), GFP_KERNEL);
|
||
|
|
if (!rdescs)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
map = dev_get_regmap(parent, NULL);
|
||
|
|
if (!map)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
rv = regmap_read(map, MAX77650_REG_CID, &val);
|
||
|
|
if (rv)
|
||
|
|
return rv;
|
||
|
|
|
||
|
|
rdescs[MAX77650_REGULATOR_ID_LDO] = &max77650_LDO_desc;
|
||
|
|
rdescs[MAX77650_REGULATOR_ID_SBB0] = &max77650_SBB0_desc;
|
||
|
|
|
||
|
|
switch (MAX77650_CID_BITS(val)) {
|
||
|
|
case MAX77650_CID_77650A:
|
||
|
|
case MAX77650_CID_77650C:
|
||
|
|
rdescs[MAX77650_REGULATOR_ID_SBB1] = &max77650_SBB1_desc;
|
||
|
|
rdescs[MAX77650_REGULATOR_ID_SBB2] = &max77650_SBB2_desc;
|
||
|
|
break;
|
||
|
|
case MAX77650_CID_77651A:
|
||
|
|
case MAX77650_CID_77651B:
|
||
|
|
rdescs[MAX77650_REGULATOR_ID_SBB1] = &max77651_SBB1_desc;
|
||
|
|
rdescs[MAX77650_REGULATOR_ID_SBB2] = &max77651_SBB2_desc;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
config.dev = parent;
|
||
|
|
|
||
|
|
for (i = 0; i < MAX77650_REGULATOR_NUM_REGULATORS; i++) {
|
||
|
|
rdesc = rdescs[i];
|
||
|
|
config.driver_data = rdesc;
|
||
|
|
|
||
|
|
rdev = devm_regulator_register(dev, &rdesc->desc, &config);
|
||
|
|
if (IS_ERR(rdev))
|
||
|
|
return PTR_ERR(rdev);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct of_device_id max77650_regulator_of_match[] = {
|
||
|
|
{ .compatible = "maxim,max77650-regulator" },
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, max77650_regulator_of_match);
|
||
|
|
|
||
|
|
static struct platform_driver max77650_regulator_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "max77650-regulator",
|
||
|
|
.of_match_table = max77650_regulator_of_match,
|
||
|
|
},
|
||
|
|
.probe = max77650_regulator_probe,
|
||
|
|
};
|
||
|
|
module_platform_driver(max77650_regulator_driver);
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("MAXIM 77650/77651 regulator driver");
|
||
|
|
MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
|
||
|
|
MODULE_LICENSE("GPL v2");
|
||
|
|
MODULE_ALIAS("platform:max77650-regulator");
|