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/*
* AXP20x regulators driver.
*
* Copyright (C) 2013 Carlo Caione <carlo@caione.org>
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file "COPYING" in the main directory of this
* archive for more details.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/err.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/mfd/axp20x.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>
#define AXP20X_IO_ENABLED 0x03
#define AXP20X_IO_DISABLED 0x07
#define AXP20X_WORKMODE_DCDC2_MASK BIT(2)
#define AXP20X_WORKMODE_DCDC3_MASK BIT(1)
#define AXP20X_FREQ_DCDC_MASK 0x0f
#define AXP20X_DESC_IO(_id, _supply, _min, _max, _step, _vreg, _vmask, _ereg, \
_emask, _enable_val, _disable_val) \
[AXP20X_##_id] = { \
.name = #_id, \
.supply_name = (_supply), \
.type = REGULATOR_VOLTAGE, \
.id = AXP20X_##_id, \
.n_voltages = (((_max) - (_min)) / (_step) + 1), \
.owner = THIS_MODULE, \
.min_uV = (_min) * 1000, \
.uV_step = (_step) * 1000, \
.vsel_reg = (_vreg), \
.vsel_mask = (_vmask), \
.enable_reg = (_ereg), \
.enable_mask = (_emask), \
.enable_val = (_enable_val), \
.disable_val = (_disable_val), \
.ops = &axp20x_ops, \
}
#define AXP20X_DESC(_id, _supply, _min, _max, _step, _vreg, _vmask, _ereg, \
_emask) \
[AXP20X_##_id] = { \
.name = #_id, \
.supply_name = (_supply), \
.type = REGULATOR_VOLTAGE, \
.id = AXP20X_##_id, \
.n_voltages = (((_max) - (_min)) / (_step) + 1), \
.owner = THIS_MODULE, \
.min_uV = (_min) * 1000, \
.uV_step = (_step) * 1000, \
.vsel_reg = (_vreg), \
.vsel_mask = (_vmask), \
.enable_reg = (_ereg), \
.enable_mask = (_emask), \
.ops = &axp20x_ops, \
}
#define AXP20X_DESC_FIXED(_id, _supply, _volt) \
[AXP20X_##_id] = { \
.name = #_id, \
.supply_name = (_supply), \
.type = REGULATOR_VOLTAGE, \
.id = AXP20X_##_id, \
.n_voltages = 1, \
.owner = THIS_MODULE, \
.min_uV = (_volt) * 1000, \
.ops = &axp20x_ops_fixed \
}
#define AXP20X_DESC_TABLE(_id, _supply, _table, _vreg, _vmask, _ereg, _emask) \
[AXP20X_##_id] = { \
.name = #_id, \
.supply_name = (_supply), \
.type = REGULATOR_VOLTAGE, \
.id = AXP20X_##_id, \
.n_voltages = ARRAY_SIZE(_table), \
.owner = THIS_MODULE, \
.vsel_reg = (_vreg), \
.vsel_mask = (_vmask), \
.enable_reg = (_ereg), \
.enable_mask = (_emask), \
.volt_table = (_table), \
.ops = &axp20x_ops_table, \
}
static const int axp20x_ldo4_data[] = { 1250000, 1300000, 1400000, 1500000, 1600000,
1700000, 1800000, 1900000, 2000000, 2500000,
2700000, 2800000, 3000000, 3100000, 3200000,
3300000 };
static struct regulator_ops axp20x_ops_fixed = {
.list_voltage = regulator_list_voltage_linear,
};
static struct regulator_ops axp20x_ops_table = {
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_ascend,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
};
static struct regulator_ops axp20x_ops = {
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
};
static const struct regulator_desc axp20x_regulators[] = {
AXP20X_DESC(DCDC2, "vin2", 700, 2275, 25, AXP20X_DCDC2_V_OUT, 0x3f,
AXP20X_PWR_OUT_CTRL, 0x10),
AXP20X_DESC(DCDC3, "vin3", 700, 3500, 25, AXP20X_DCDC3_V_OUT, 0x7f,
AXP20X_PWR_OUT_CTRL, 0x02),
AXP20X_DESC_FIXED(LDO1, "acin", 1300),
AXP20X_DESC(LDO2, "ldo24in", 1800, 3300, 100, AXP20X_LDO24_V_OUT, 0xf0,
AXP20X_PWR_OUT_CTRL, 0x04),
AXP20X_DESC(LDO3, "ldo3in", 700, 3500, 25, AXP20X_LDO3_V_OUT, 0x7f,
AXP20X_PWR_OUT_CTRL, 0x40),
AXP20X_DESC_TABLE(LDO4, "ldo24in", axp20x_ldo4_data, AXP20X_LDO24_V_OUT, 0x0f,
AXP20X_PWR_OUT_CTRL, 0x08),
AXP20X_DESC_IO(LDO5, "ldo5in", 1800, 3300, 100, AXP20X_LDO5_V_OUT, 0xf0,
AXP20X_GPIO0_CTRL, 0x07, AXP20X_IO_ENABLED,
AXP20X_IO_DISABLED),
};
#define AXP_MATCH(_name, _id) \
[AXP20X_##_id] = { \
.name = #_name, \
.driver_data = (void *) &axp20x_regulators[AXP20X_##_id], \
}
static struct of_regulator_match axp20x_matches[] = {
AXP_MATCH(dcdc2, DCDC2),
AXP_MATCH(dcdc3, DCDC3),
AXP_MATCH(ldo1, LDO1),
AXP_MATCH(ldo2, LDO2),
AXP_MATCH(ldo3, LDO3),
AXP_MATCH(ldo4, LDO4),
AXP_MATCH(ldo5, LDO5),
};
static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
{
struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
if (dcdcfreq < 750) {
dcdcfreq = 750;
dev_warn(&pdev->dev, "DCDC frequency too low. Set to 750kHz\n");
}
if (dcdcfreq > 1875) {
dcdcfreq = 1875;
dev_warn(&pdev->dev, "DCDC frequency too high. Set to 1875kHz\n");
}
dcdcfreq = (dcdcfreq - 750) / 75;
return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ,
AXP20X_FREQ_DCDC_MASK, dcdcfreq);
}
static int axp20x_regulator_parse_dt(struct platform_device *pdev)
{
struct device_node *np, *regulators;
int ret;
u32 dcdcfreq;
np = of_node_get(pdev->dev.parent->of_node);
if (!np)
return 0;
regulators = of_get_child_by_name(np, "regulators");
if (!regulators) {
dev_warn(&pdev->dev, "regulators node not found\n");
} else {
ret = of_regulator_match(&pdev->dev, regulators, axp20x_matches,
ARRAY_SIZE(axp20x_matches));
if (ret < 0) {
dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", ret);
return ret;
}
dcdcfreq = 1500;
of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq);
ret = axp20x_set_dcdc_freq(pdev, dcdcfreq);
if (ret < 0) {
dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret);
return ret;
}
of_node_put(regulators);
}
return 0;
}
static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode)
{
unsigned int mask = AXP20X_WORKMODE_DCDC2_MASK;
if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
return -EINVAL;
if (id == AXP20X_DCDC3)
mask = AXP20X_WORKMODE_DCDC3_MASK;
workmode <<= ffs(mask) - 1;
return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode);
}
static int axp20x_regulator_probe(struct platform_device *pdev)
{
struct regulator_dev *rdev;
struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
struct regulator_config config = { };
struct regulator_init_data *init_data;
int ret, i;
u32 workmode;
ret = axp20x_regulator_parse_dt(pdev);
if (ret)
return ret;
for (i = 0; i < AXP20X_REG_ID_MAX; i++) {
init_data = axp20x_matches[i].init_data;
config.dev = pdev->dev.parent;
config.init_data = init_data;
config.regmap = axp20x->regmap;
config.of_node = axp20x_matches[i].of_node;
rdev = devm_regulator_register(&pdev->dev, &axp20x_regulators[i],
&config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "Failed to register %s\n",
axp20x_regulators[i].name);
return PTR_ERR(rdev);
}
ret = of_property_read_u32(axp20x_matches[i].of_node, "x-powers,dcdc-workmode",
&workmode);
if (!ret) {
if (axp20x_set_dcdc_workmode(rdev, i, workmode))
dev_err(&pdev->dev, "Failed to set workmode on %s\n",
axp20x_regulators[i].name);
}
}
return 0;
}
static struct platform_driver axp20x_regulator_driver = {
.probe = axp20x_regulator_probe,
.driver = {
.name = "axp20x-regulator",
},
};
module_platform_driver(axp20x_regulator_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC");
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