regulator: AXP20x: Add support for regulators subsystem
AXP202 and AXP209 come with two synchronous step-down DC-DCs and five LDOs. This patch introduces basic support for those regulators. Signed-off-by: Carlo Caione <carlo@caione.org> Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Carlo Caione
Mark Brown
Родитель
c9eaa447e7
Коммит
dfe7a1b058
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@ -139,6 +139,13 @@ config REGULATOR_AS3722
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AS3722 PMIC. This will enable support for all the software
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controllable DCDC/LDO regulators.
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config REGULATOR_AXP20X
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tristate "X-POWERS AXP20X PMIC Regulators"
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depends on MFD_AXP20X
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help
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This driver provides support for the voltage regulators on the
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AXP20X PMIC.
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config REGULATOR_BCM590XX
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tristate "Broadcom BCM590xx PMU Regulators"
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depends on MFD_BCM590XX
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@ -20,6 +20,7 @@ obj-$(CONFIG_REGULATOR_ANATOP) += anatop-regulator.o
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obj-$(CONFIG_REGULATOR_ARIZONA) += arizona-micsupp.o arizona-ldo1.o
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obj-$(CONFIG_REGULATOR_AS3711) += as3711-regulator.o
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obj-$(CONFIG_REGULATOR_AS3722) += as3722-regulator.o
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obj-$(CONFIG_REGULATOR_AXP20X) += axp20x-regulator.o
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obj-$(CONFIG_REGULATOR_BCM590XX) += bcm590xx-regulator.o
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obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
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obj-$(CONFIG_REGULATOR_DA9052) += da9052-regulator.o
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@ -0,0 +1,285 @@
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/*
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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 AXP20X_WORKMODE_DCDC2_MASK BIT(2)
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#define AXP20X_WORKMODE_DCDC3_MASK BIT(1)
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#define AXP20X_FREQ_DCDC_MASK 0x0f
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#define AXP20X_DESC_IO(_id, _supply, _min, _max, _step, _vreg, _vmask, _ereg, \
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_emask, _enable_val, _disable_val) \
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[AXP20X_##_id] = { \
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.name = #_id, \
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.supply_name = (_supply), \
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.type = REGULATOR_VOLTAGE, \
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.id = AXP20X_##_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 AXP20X_DESC(_id, _supply, _min, _max, _step, _vreg, _vmask, _ereg, \
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_emask) \
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[AXP20X_##_id] = { \
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.name = #_id, \
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.supply_name = (_supply), \
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.type = REGULATOR_VOLTAGE, \
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.id = AXP20X_##_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 AXP20X_DESC_FIXED(_id, _supply, _volt) \
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[AXP20X_##_id] = { \
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.name = #_id, \
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.supply_name = (_supply), \
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.type = REGULATOR_VOLTAGE, \
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.id = AXP20X_##_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 AXP20X_DESC_TABLE(_id, _supply, _table, _vreg, _vmask, _ereg, _emask) \
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[AXP20X_##_id] = { \
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.name = #_id, \
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.supply_name = (_supply), \
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.type = REGULATOR_VOLTAGE, \
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.id = AXP20X_##_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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.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 const struct regulator_desc axp20x_regulators[] = {
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AXP20X_DESC(DCDC2, "vin2", 700, 2275, 25, AXP20X_DCDC2_V_OUT, 0x3f,
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AXP20X_PWR_OUT_CTRL, 0x10),
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AXP20X_DESC(DCDC3, "vin3", 700, 3500, 25, AXP20X_DCDC3_V_OUT, 0x7f,
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AXP20X_PWR_OUT_CTRL, 0x02),
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AXP20X_DESC_FIXED(LDO1, "acin", 1300),
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AXP20X_DESC(LDO2, "ldo24in", 1800, 3300, 100, AXP20X_LDO24_V_OUT, 0xf0,
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AXP20X_PWR_OUT_CTRL, 0x04),
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AXP20X_DESC(LDO3, "ldo3in", 700, 3500, 25, AXP20X_LDO3_V_OUT, 0x7f,
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AXP20X_PWR_OUT_CTRL, 0x40),
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AXP20X_DESC_TABLE(LDO4, "ldo24in", axp20x_ldo4_data, AXP20X_LDO24_V_OUT, 0x0f,
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AXP20X_PWR_OUT_CTRL, 0x08),
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AXP20X_DESC_IO(LDO5, "ldo5in", 1800, 3300, 100, AXP20X_LDO5_V_OUT, 0xf0,
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AXP20X_GPIO0_CTRL, 0x07, AXP20X_IO_ENABLED,
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AXP20X_IO_DISABLED),
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};
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#define AXP_MATCH(_name, _id) \
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[AXP20X_##_id] = { \
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.name = #_name, \
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.driver_data = (void *) &axp20x_regulators[AXP20X_##_id], \
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}
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static struct of_regulator_match axp20x_matches[] = {
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AXP_MATCH(dcdc2, DCDC2),
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AXP_MATCH(dcdc3, DCDC3),
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AXP_MATCH(ldo1, LDO1),
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AXP_MATCH(ldo2, LDO2),
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AXP_MATCH(ldo3, LDO3),
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AXP_MATCH(ldo4, LDO4),
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AXP_MATCH(ldo5, LDO5),
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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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if (dcdcfreq < 750) {
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dcdcfreq = 750;
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dev_warn(&pdev->dev, "DCDC frequency too low. Set to 750kHz\n");
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}
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if (dcdcfreq > 1875) {
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dcdcfreq = 1875;
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dev_warn(&pdev->dev, "DCDC frequency too high. Set to 1875kHz\n");
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}
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dcdcfreq = (dcdcfreq - 750) / 75;
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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;
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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_find_node_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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ret = of_regulator_match(&pdev->dev, regulators, axp20x_matches,
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ARRAY_SIZE(axp20x_matches));
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if (ret < 0) {
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dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", ret);
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return ret;
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}
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dcdcfreq = 1500;
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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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unsigned int mask = AXP20X_WORKMODE_DCDC2_MASK;
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if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
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return -EINVAL;
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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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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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struct regulator_config config = { };
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struct regulator_init_data *init_data;
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int ret, i;
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u32 workmode;
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ret = axp20x_regulator_parse_dt(pdev);
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if (ret)
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return ret;
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for (i = 0; i < AXP20X_REG_ID_MAX; i++) {
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init_data = axp20x_matches[i].init_data;
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config.dev = &pdev->dev;
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config.init_data = init_data;
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config.regmap = axp20x->regmap;
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config.of_node = axp20x_matches[i].of_node;
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rdev = devm_regulator_register(&pdev->dev, &axp20x_regulators[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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axp20x_regulators[i].name);
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return PTR_ERR(rdev);
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}
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ret = of_property_read_u32(axp20x_matches[i].of_node, "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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axp20x_regulators[i].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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.owner = THIS_MODULE,
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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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