408 lines
13 KiB
C
408 lines
13 KiB
C
/*
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* AXP20x regulators driver.
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*
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* Copyright (C) 2013 Carlo Caione <carlo@caione.org>
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of this
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* archive for more details.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/module.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/regmap.h>
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#include <linux/mfd/axp20x.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/of_regulator.h>
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#define AXP20X_IO_ENABLED 0x03
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#define AXP20X_IO_DISABLED 0x07
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#define AXP22X_IO_ENABLED 0x04
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#define AXP22X_IO_DISABLED 0x03
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#define AXP20X_WORKMODE_DCDC2_MASK BIT(2)
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#define AXP20X_WORKMODE_DCDC3_MASK BIT(1)
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#define AXP22X_WORKMODE_DCDCX_MASK(x) BIT(x)
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#define AXP20X_FREQ_DCDC_MASK 0x0f
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#define AXP_DESC_IO(_family, _id, _match, _supply, _min, _max, _step, _vreg, \
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_vmask, _ereg, _emask, _enable_val, _disable_val) \
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[_family##_##_id] = { \
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.name = #_id, \
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.supply_name = (_supply), \
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.of_match = of_match_ptr(_match), \
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.regulators_node = of_match_ptr("regulators"), \
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.type = REGULATOR_VOLTAGE, \
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.id = _family##_##_id, \
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.n_voltages = (((_max) - (_min)) / (_step) + 1), \
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.owner = THIS_MODULE, \
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.min_uV = (_min) * 1000, \
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.uV_step = (_step) * 1000, \
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.vsel_reg = (_vreg), \
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.vsel_mask = (_vmask), \
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.enable_reg = (_ereg), \
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.enable_mask = (_emask), \
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.enable_val = (_enable_val), \
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.disable_val = (_disable_val), \
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.ops = &axp20x_ops, \
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}
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#define AXP_DESC(_family, _id, _match, _supply, _min, _max, _step, _vreg, \
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_vmask, _ereg, _emask) \
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[_family##_##_id] = { \
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.name = #_id, \
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.supply_name = (_supply), \
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.of_match = of_match_ptr(_match), \
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.regulators_node = of_match_ptr("regulators"), \
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.type = REGULATOR_VOLTAGE, \
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.id = _family##_##_id, \
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.n_voltages = (((_max) - (_min)) / (_step) + 1), \
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.owner = THIS_MODULE, \
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.min_uV = (_min) * 1000, \
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.uV_step = (_step) * 1000, \
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.vsel_reg = (_vreg), \
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.vsel_mask = (_vmask), \
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.enable_reg = (_ereg), \
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.enable_mask = (_emask), \
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.ops = &axp20x_ops, \
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}
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#define AXP_DESC_SW(_family, _id, _match, _supply, _min, _max, _step, _vreg, \
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_vmask, _ereg, _emask) \
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[_family##_##_id] = { \
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.name = #_id, \
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.supply_name = (_supply), \
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.of_match = of_match_ptr(_match), \
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.regulators_node = of_match_ptr("regulators"), \
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.type = REGULATOR_VOLTAGE, \
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.id = _family##_##_id, \
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.n_voltages = (((_max) - (_min)) / (_step) + 1), \
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.owner = THIS_MODULE, \
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.min_uV = (_min) * 1000, \
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.uV_step = (_step) * 1000, \
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.vsel_reg = (_vreg), \
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.vsel_mask = (_vmask), \
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.enable_reg = (_ereg), \
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.enable_mask = (_emask), \
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.ops = &axp20x_ops_sw, \
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}
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#define AXP_DESC_FIXED(_family, _id, _match, _supply, _volt) \
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[_family##_##_id] = { \
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.name = #_id, \
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.supply_name = (_supply), \
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.of_match = of_match_ptr(_match), \
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.regulators_node = of_match_ptr("regulators"), \
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.type = REGULATOR_VOLTAGE, \
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.id = _family##_##_id, \
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.n_voltages = 1, \
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.owner = THIS_MODULE, \
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.min_uV = (_volt) * 1000, \
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.ops = &axp20x_ops_fixed \
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}
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#define AXP_DESC_TABLE(_family, _id, _match, _supply, _table, _vreg, _vmask, \
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_ereg, _emask) \
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[_family##_##_id] = { \
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.name = #_id, \
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.supply_name = (_supply), \
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.of_match = of_match_ptr(_match), \
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.regulators_node = of_match_ptr("regulators"), \
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.type = REGULATOR_VOLTAGE, \
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.id = _family##_##_id, \
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.n_voltages = ARRAY_SIZE(_table), \
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.owner = THIS_MODULE, \
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.vsel_reg = (_vreg), \
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.vsel_mask = (_vmask), \
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.enable_reg = (_ereg), \
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.enable_mask = (_emask), \
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.volt_table = (_table), \
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.ops = &axp20x_ops_table, \
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}
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static const int axp20x_ldo4_data[] = { 1250000, 1300000, 1400000, 1500000, 1600000,
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1700000, 1800000, 1900000, 2000000, 2500000,
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2700000, 2800000, 3000000, 3100000, 3200000,
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3300000 };
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static struct regulator_ops axp20x_ops_fixed = {
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.list_voltage = regulator_list_voltage_linear,
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};
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static struct regulator_ops axp20x_ops_table = {
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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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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_ascend,
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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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};
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static struct regulator_ops axp20x_ops = {
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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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.list_voltage = regulator_list_voltage_linear,
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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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};
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static struct regulator_ops axp20x_ops_sw = {
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.list_voltage = regulator_list_voltage_linear,
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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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};
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static const struct regulator_desc axp20x_regulators[] = {
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AXP_DESC(AXP20X, DCDC2, "dcdc2", "vin2", 700, 2275, 25,
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AXP20X_DCDC2_V_OUT, 0x3f, AXP20X_PWR_OUT_CTRL, 0x10),
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AXP_DESC(AXP20X, DCDC3, "dcdc3", "vin3", 700, 3500, 25,
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AXP20X_DCDC3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x02),
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AXP_DESC_FIXED(AXP20X, LDO1, "ldo1", "acin", 1300),
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AXP_DESC(AXP20X, LDO2, "ldo2", "ldo24in", 1800, 3300, 100,
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AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04),
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AXP_DESC(AXP20X, LDO3, "ldo3", "ldo3in", 700, 3500, 25,
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AXP20X_LDO3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x40),
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AXP_DESC_TABLE(AXP20X, LDO4, "ldo4", "ldo24in", axp20x_ldo4_data,
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AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL, 0x08),
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AXP_DESC_IO(AXP20X, LDO5, "ldo5", "ldo5in", 1800, 3300, 100,
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AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07,
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AXP20X_IO_ENABLED, AXP20X_IO_DISABLED),
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};
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static const struct regulator_desc axp22x_regulators[] = {
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AXP_DESC(AXP22X, DCDC1, "dcdc1", "vin1", 1600, 3400, 100,
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AXP22X_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(1)),
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AXP_DESC(AXP22X, DCDC2, "dcdc2", "vin2", 600, 1540, 20,
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AXP22X_DCDC2_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(2)),
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AXP_DESC(AXP22X, DCDC3, "dcdc3", "vin3", 600, 1860, 20,
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AXP22X_DCDC3_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(3)),
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AXP_DESC(AXP22X, DCDC4, "dcdc4", "vin4", 600, 1540, 20,
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AXP22X_DCDC4_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(3)),
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AXP_DESC(AXP22X, DCDC5, "dcdc5", "vin5", 1000, 2550, 50,
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AXP22X_DCDC5_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(4)),
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/* secondary switchable output of DCDC1 */
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AXP_DESC_SW(AXP22X, DC1SW, "dc1sw", "dcdc1", 1600, 3400, 100,
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AXP22X_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(7)),
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/* LDO regulator internally chained to DCDC5 */
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AXP_DESC(AXP22X, DC5LDO, "dc5ldo", "dcdc5", 700, 1400, 100,
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AXP22X_DC5LDO_V_OUT, 0x7, AXP22X_PWR_OUT_CTRL1, BIT(0)),
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AXP_DESC(AXP22X, ALDO1, "aldo1", "aldoin", 700, 3300, 100,
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AXP22X_ALDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(6)),
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AXP_DESC(AXP22X, ALDO2, "aldo2", "aldoin", 700, 3300, 100,
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AXP22X_ALDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(7)),
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AXP_DESC(AXP22X, ALDO3, "aldo3", "aldoin", 700, 3300, 100,
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AXP22X_ALDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL3, BIT(7)),
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AXP_DESC(AXP22X, DLDO1, "dldo1", "dldoin", 700, 3300, 100,
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AXP22X_DLDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(3)),
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AXP_DESC(AXP22X, DLDO2, "dldo2", "dldoin", 700, 3300, 100,
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AXP22X_DLDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(4)),
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AXP_DESC(AXP22X, DLDO3, "dldo3", "dldoin", 700, 3300, 100,
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AXP22X_DLDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(5)),
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AXP_DESC(AXP22X, DLDO4, "dldo4", "dldoin", 700, 3300, 100,
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AXP22X_DLDO4_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(6)),
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AXP_DESC(AXP22X, ELDO1, "eldo1", "eldoin", 700, 3300, 100,
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AXP22X_ELDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(0)),
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AXP_DESC(AXP22X, ELDO2, "eldo2", "eldoin", 700, 3300, 100,
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AXP22X_ELDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(1)),
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AXP_DESC(AXP22X, ELDO3, "eldo3", "eldoin", 700, 3300, 100,
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AXP22X_ELDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(2)),
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AXP_DESC_IO(AXP22X, LDO_IO0, "ldo_io0", "ips", 1800, 3300, 100,
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AXP22X_LDO_IO0_V_OUT, 0x1f, AXP20X_GPIO0_CTRL, 0x07,
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AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
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AXP_DESC_IO(AXP22X, LDO_IO1, "ldo_io1", "ips", 1800, 3300, 100,
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AXP22X_LDO_IO1_V_OUT, 0x1f, AXP20X_GPIO1_CTRL, 0x07,
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AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
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AXP_DESC_FIXED(AXP22X, RTC_LDO, "rtc_ldo", "ips", 3000),
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};
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static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
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{
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struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
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u32 min, max, def, step;
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switch (axp20x->variant) {
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case AXP202_ID:
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case AXP209_ID:
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min = 750;
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max = 1875;
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def = 1500;
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step = 75;
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break;
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case AXP221_ID:
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min = 1800;
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max = 4050;
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def = 3000;
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step = 150;
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break;
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default:
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dev_err(&pdev->dev,
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"Setting DCDC frequency for unsupported AXP variant\n");
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return -EINVAL;
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}
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if (dcdcfreq == 0)
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dcdcfreq = def;
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if (dcdcfreq < min) {
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dcdcfreq = min;
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dev_warn(&pdev->dev, "DCDC frequency too low. Set to %ukHz\n",
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min);
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}
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if (dcdcfreq > max) {
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dcdcfreq = max;
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dev_warn(&pdev->dev, "DCDC frequency too high. Set to %ukHz\n",
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max);
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}
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dcdcfreq = (dcdcfreq - min) / step;
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return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ,
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AXP20X_FREQ_DCDC_MASK, dcdcfreq);
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}
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static int axp20x_regulator_parse_dt(struct platform_device *pdev)
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{
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struct device_node *np, *regulators;
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int ret;
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u32 dcdcfreq = 0;
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np = of_node_get(pdev->dev.parent->of_node);
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if (!np)
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return 0;
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regulators = of_get_child_by_name(np, "regulators");
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if (!regulators) {
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dev_warn(&pdev->dev, "regulators node not found\n");
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} else {
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of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq);
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ret = axp20x_set_dcdc_freq(pdev, dcdcfreq);
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if (ret < 0) {
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dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret);
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return ret;
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}
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of_node_put(regulators);
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}
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return 0;
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}
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static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode)
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{
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struct axp20x_dev *axp20x = rdev_get_drvdata(rdev);
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unsigned int mask;
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switch (axp20x->variant) {
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case AXP202_ID:
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case AXP209_ID:
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if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
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return -EINVAL;
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mask = AXP20X_WORKMODE_DCDC2_MASK;
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if (id == AXP20X_DCDC3)
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mask = AXP20X_WORKMODE_DCDC3_MASK;
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workmode <<= ffs(mask) - 1;
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break;
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case AXP221_ID:
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if (id < AXP22X_DCDC1 || id > AXP22X_DCDC5)
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return -EINVAL;
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mask = AXP22X_WORKMODE_DCDCX_MASK(id - AXP22X_DCDC1);
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workmode <<= id - AXP22X_DCDC1;
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break;
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default:
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/* should not happen */
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WARN_ON(1);
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return -EINVAL;
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}
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return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode);
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}
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static int axp20x_regulator_probe(struct platform_device *pdev)
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{
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struct regulator_dev *rdev;
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struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
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const struct regulator_desc *regulators;
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struct regulator_config config = {
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.dev = pdev->dev.parent,
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.regmap = axp20x->regmap,
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.driver_data = axp20x,
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};
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int ret, i, nregulators;
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u32 workmode;
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switch (axp20x->variant) {
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case AXP202_ID:
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case AXP209_ID:
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regulators = axp20x_regulators;
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nregulators = AXP20X_REG_ID_MAX;
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break;
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case AXP221_ID:
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regulators = axp22x_regulators;
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nregulators = AXP22X_REG_ID_MAX;
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break;
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default:
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dev_err(&pdev->dev, "Unsupported AXP variant: %ld\n",
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axp20x->variant);
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return -EINVAL;
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}
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/* This only sets the dcdc freq. Ignore any errors */
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axp20x_regulator_parse_dt(pdev);
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for (i = 0; i < nregulators; i++) {
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rdev = devm_regulator_register(&pdev->dev, ®ulators[i],
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&config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev, "Failed to register %s\n",
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regulators[i].name);
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return PTR_ERR(rdev);
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}
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ret = of_property_read_u32(rdev->dev.of_node,
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"x-powers,dcdc-workmode",
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&workmode);
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if (!ret) {
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if (axp20x_set_dcdc_workmode(rdev, i, workmode))
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dev_err(&pdev->dev, "Failed to set workmode on %s\n",
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rdev->desc->name);
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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 axp20x_regulator_driver = {
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.probe = axp20x_regulator_probe,
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.driver = {
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.name = "axp20x-regulator",
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},
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};
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module_platform_driver(axp20x_regulator_driver);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
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MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC");
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