286 lines
8.1 KiB
C
286 lines
8.1 KiB
C
|
/*
|
||
|
|
* 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,
|
||
|
|
.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_find_node_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;
|
||
|
|
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",
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
module_platform_driver(axp20x_regulator_driver);
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL v2");
|
||
|
|
MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
|
||
|
|
MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC");
|