319 lines
9.2 KiB
C
319 lines
9.2 KiB
C
/*
|
|
* max77693.c - Regulator driver for the Maxim 77693 and 77843
|
|
*
|
|
* Copyright (C) 2013-2015 Samsung Electronics
|
|
* Jonghwa Lee <jonghwa3.lee@samsung.com>
|
|
* Krzysztof Kozlowski <krzk@kernel.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* This driver is based on max77686.c
|
|
*/
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/module.h>
|
|
#include <linux/export.h>
|
|
#include <linux/regulator/driver.h>
|
|
#include <linux/regulator/machine.h>
|
|
#include <linux/mfd/max77693.h>
|
|
#include <linux/mfd/max77693-common.h>
|
|
#include <linux/mfd/max77693-private.h>
|
|
#include <linux/mfd/max77843-private.h>
|
|
#include <linux/regulator/of_regulator.h>
|
|
#include <linux/regmap.h>
|
|
|
|
/*
|
|
* ID for MAX77843 regulators.
|
|
* There is no need for such for MAX77693.
|
|
*/
|
|
enum max77843_regulator_type {
|
|
MAX77843_SAFEOUT1 = 0,
|
|
MAX77843_SAFEOUT2,
|
|
MAX77843_CHARGER,
|
|
|
|
MAX77843_NUM,
|
|
};
|
|
|
|
/* Register differences between chargers: MAX77693 and MAX77843 */
|
|
struct chg_reg_data {
|
|
unsigned int linear_reg;
|
|
unsigned int linear_mask;
|
|
unsigned int uA_step;
|
|
unsigned int min_sel;
|
|
};
|
|
|
|
/*
|
|
* MAX77693 CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA
|
|
* 0x00, 0x01, 0x2, 0x03 = 60 mA
|
|
* 0x04 ~ 0x7E = (60 + (X - 3) * 20) mA
|
|
* Actually for MAX77693 the driver manipulates the maximum input current,
|
|
* not the fast charge current (output). This should be fixed.
|
|
*
|
|
* On MAX77843 the calculation formula is the same (except values).
|
|
* Fortunately it properly manipulates the fast charge current.
|
|
*/
|
|
static int max77693_chg_get_current_limit(struct regulator_dev *rdev)
|
|
{
|
|
const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev);
|
|
unsigned int chg_min_uA = rdev->constraints->min_uA;
|
|
unsigned int chg_max_uA = rdev->constraints->max_uA;
|
|
unsigned int reg, sel;
|
|
unsigned int val;
|
|
int ret;
|
|
|
|
ret = regmap_read(rdev->regmap, reg_data->linear_reg, ®);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
sel = reg & reg_data->linear_mask;
|
|
|
|
/* the first four codes for charger current are all 60mA */
|
|
if (sel <= reg_data->min_sel)
|
|
sel = 0;
|
|
else
|
|
sel -= reg_data->min_sel;
|
|
|
|
val = chg_min_uA + reg_data->uA_step * sel;
|
|
if (val > chg_max_uA)
|
|
return -EINVAL;
|
|
|
|
return val;
|
|
}
|
|
|
|
static int max77693_chg_set_current_limit(struct regulator_dev *rdev,
|
|
int min_uA, int max_uA)
|
|
{
|
|
const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev);
|
|
unsigned int chg_min_uA = rdev->constraints->min_uA;
|
|
int sel = 0;
|
|
|
|
while (chg_min_uA + reg_data->uA_step * sel < min_uA)
|
|
sel++;
|
|
|
|
if (chg_min_uA + reg_data->uA_step * sel > max_uA)
|
|
return -EINVAL;
|
|
|
|
/* the first four codes for charger current are all 60mA */
|
|
sel += reg_data->min_sel;
|
|
|
|
return regmap_write(rdev->regmap, reg_data->linear_reg, sel);
|
|
}
|
|
/* end of CHARGER regulator ops */
|
|
|
|
/* Returns regmap suitable for given regulator on chosen device */
|
|
static struct regmap *max77693_get_regmap(enum max77693_types type,
|
|
struct max77693_dev *max77693,
|
|
int reg_id)
|
|
{
|
|
if (type == TYPE_MAX77693)
|
|
return max77693->regmap;
|
|
|
|
/* Else: TYPE_MAX77843 */
|
|
switch (reg_id) {
|
|
case MAX77843_SAFEOUT1:
|
|
case MAX77843_SAFEOUT2:
|
|
return max77693->regmap;
|
|
case MAX77843_CHARGER:
|
|
return max77693->regmap_chg;
|
|
default:
|
|
return max77693->regmap;
|
|
}
|
|
}
|
|
|
|
static const unsigned int max77693_safeout_table[] = {
|
|
4850000,
|
|
4900000,
|
|
4950000,
|
|
3300000,
|
|
};
|
|
|
|
static const struct regulator_ops max77693_safeout_ops = {
|
|
.list_voltage = regulator_list_voltage_table,
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
|
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
|
};
|
|
|
|
static const struct regulator_ops max77693_charger_ops = {
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.get_current_limit = max77693_chg_get_current_limit,
|
|
.set_current_limit = max77693_chg_set_current_limit,
|
|
};
|
|
|
|
#define max77693_regulator_desc_esafeout(_num) { \
|
|
.name = "ESAFEOUT"#_num, \
|
|
.id = MAX77693_ESAFEOUT##_num, \
|
|
.of_match = of_match_ptr("ESAFEOUT"#_num), \
|
|
.regulators_node = of_match_ptr("regulators"), \
|
|
.n_voltages = 4, \
|
|
.ops = &max77693_safeout_ops, \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.owner = THIS_MODULE, \
|
|
.volt_table = max77693_safeout_table, \
|
|
.vsel_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \
|
|
.vsel_mask = SAFEOUT_CTRL_SAFEOUT##_num##_MASK, \
|
|
.enable_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \
|
|
.enable_mask = SAFEOUT_CTRL_ENSAFEOUT##_num##_MASK , \
|
|
}
|
|
|
|
static const struct regulator_desc max77693_supported_regulators[] = {
|
|
max77693_regulator_desc_esafeout(1),
|
|
max77693_regulator_desc_esafeout(2),
|
|
{
|
|
.name = "CHARGER",
|
|
.id = MAX77693_CHARGER,
|
|
.of_match = of_match_ptr("CHARGER"),
|
|
.regulators_node = of_match_ptr("regulators"),
|
|
.ops = &max77693_charger_ops,
|
|
.type = REGULATOR_CURRENT,
|
|
.owner = THIS_MODULE,
|
|
.enable_reg = MAX77693_CHG_REG_CHG_CNFG_00,
|
|
.enable_mask = CHG_CNFG_00_CHG_MASK |
|
|
CHG_CNFG_00_BUCK_MASK,
|
|
.enable_val = CHG_CNFG_00_CHG_MASK | CHG_CNFG_00_BUCK_MASK,
|
|
},
|
|
};
|
|
|
|
static const struct chg_reg_data max77693_chg_reg_data = {
|
|
.linear_reg = MAX77693_CHG_REG_CHG_CNFG_09,
|
|
.linear_mask = CHG_CNFG_09_CHGIN_ILIM_MASK,
|
|
.uA_step = 20000,
|
|
.min_sel = 3,
|
|
};
|
|
|
|
#define max77843_regulator_desc_esafeout(num) { \
|
|
.name = "SAFEOUT" # num, \
|
|
.id = MAX77843_SAFEOUT ## num, \
|
|
.ops = &max77693_safeout_ops, \
|
|
.of_match = of_match_ptr("SAFEOUT" # num), \
|
|
.regulators_node = of_match_ptr("regulators"), \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.owner = THIS_MODULE, \
|
|
.n_voltages = ARRAY_SIZE(max77693_safeout_table), \
|
|
.volt_table = max77693_safeout_table, \
|
|
.enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL, \
|
|
.enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT ## num, \
|
|
.vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL, \
|
|
.vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT ## num ## _MASK, \
|
|
}
|
|
|
|
static const struct regulator_desc max77843_supported_regulators[] = {
|
|
[MAX77843_SAFEOUT1] = max77843_regulator_desc_esafeout(1),
|
|
[MAX77843_SAFEOUT2] = max77843_regulator_desc_esafeout(2),
|
|
[MAX77843_CHARGER] = {
|
|
.name = "CHARGER",
|
|
.id = MAX77843_CHARGER,
|
|
.ops = &max77693_charger_ops,
|
|
.of_match = of_match_ptr("CHARGER"),
|
|
.regulators_node = of_match_ptr("regulators"),
|
|
.type = REGULATOR_CURRENT,
|
|
.owner = THIS_MODULE,
|
|
.enable_reg = MAX77843_CHG_REG_CHG_CNFG_00,
|
|
.enable_mask = MAX77843_CHG_MASK,
|
|
.enable_val = MAX77843_CHG_MASK,
|
|
},
|
|
};
|
|
|
|
static const struct chg_reg_data max77843_chg_reg_data = {
|
|
.linear_reg = MAX77843_CHG_REG_CHG_CNFG_02,
|
|
.linear_mask = MAX77843_CHG_FAST_CHG_CURRENT_MASK,
|
|
.uA_step = MAX77843_CHG_FAST_CHG_CURRENT_STEP,
|
|
.min_sel = 2,
|
|
};
|
|
|
|
static int max77693_pmic_probe(struct platform_device *pdev)
|
|
{
|
|
enum max77693_types type = platform_get_device_id(pdev)->driver_data;
|
|
struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent);
|
|
const struct regulator_desc *regulators;
|
|
unsigned int regulators_size;
|
|
int i;
|
|
struct regulator_config config = { };
|
|
|
|
config.dev = iodev->dev;
|
|
|
|
switch (type) {
|
|
case TYPE_MAX77693:
|
|
regulators = max77693_supported_regulators;
|
|
regulators_size = ARRAY_SIZE(max77693_supported_regulators);
|
|
config.driver_data = (void *)&max77693_chg_reg_data;
|
|
break;
|
|
case TYPE_MAX77843:
|
|
regulators = max77843_supported_regulators;
|
|
regulators_size = ARRAY_SIZE(max77843_supported_regulators);
|
|
config.driver_data = (void *)&max77843_chg_reg_data;
|
|
break;
|
|
default:
|
|
dev_err(&pdev->dev, "Unsupported device type: %u\n", type);
|
|
return -ENODEV;
|
|
}
|
|
|
|
for (i = 0; i < regulators_size; i++) {
|
|
struct regulator_dev *rdev;
|
|
|
|
config.regmap = max77693_get_regmap(type, iodev,
|
|
regulators[i].id);
|
|
|
|
rdev = devm_regulator_register(&pdev->dev,
|
|
®ulators[i], &config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(&pdev->dev,
|
|
"Failed to initialize regulator-%d\n", i);
|
|
return PTR_ERR(rdev);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id max77693_pmic_id[] = {
|
|
{ "max77693-pmic", TYPE_MAX77693 },
|
|
{ "max77843-regulator", TYPE_MAX77843 },
|
|
{},
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(platform, max77693_pmic_id);
|
|
|
|
static struct platform_driver max77693_pmic_driver = {
|
|
.driver = {
|
|
.name = "max77693-pmic",
|
|
},
|
|
.probe = max77693_pmic_probe,
|
|
.id_table = max77693_pmic_id,
|
|
};
|
|
|
|
static int __init max77693_pmic_init(void)
|
|
{
|
|
return platform_driver_register(&max77693_pmic_driver);
|
|
}
|
|
subsys_initcall(max77693_pmic_init);
|
|
|
|
static void __exit max77693_pmic_cleanup(void)
|
|
{
|
|
platform_driver_unregister(&max77693_pmic_driver);
|
|
}
|
|
module_exit(max77693_pmic_cleanup);
|
|
|
|
MODULE_DESCRIPTION("MAXIM 77693/77843 regulator driver");
|
|
MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>");
|
|
MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
|
|
MODULE_LICENSE("GPL");
|