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regulator: max77693: Support different register configurations 

Add support for different configurations of charger's registers so the
same driver could be used on other devices (e.g. MAX77843).

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Krzysztof Kozlowski 2015-07-15 21:59:49 +09:00 committed by Mark Brown
parent b3b58cee8a
commit 5b5e771fb7
1 changed files with 27 additions and 12 deletions
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39
drivers/regulator/max77693.c
View File

@ -33,7 +33,13 @@
#include <linux/regulator/of_regulator.h>
#include <linux/regmap.h>
#define CHGIN_ILIM_STEP_20mA 20000
/* Charger regulator differences between MAX77693 and MAX77843 */
struct chg_reg_data {
unsigned int linear_reg;
unsigned int linear_mask;
unsigned int uA_step;
unsigned int min_sel;
};
/*
* CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA
@ -42,25 +48,26 @@
*/
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, MAX77693_CHG_REG_CHG_CNFG_09, &reg);
ret = regmap_read(rdev->regmap, reg_data->linear_reg, &reg);
if (ret < 0)
return ret;
sel = reg & CHG_CNFG_09_CHGIN_ILIM_MASK;
sel = reg & reg_data->linear_mask;
/* the first four codes for charger current are all 60mA */
if (sel <= 3)
if (sel <= reg_data->min_sel)
sel = 0;
else
sel -= 3;
sel -= reg_data->min_sel;
val = chg_min_uA + CHGIN_ILIM_STEP_20mA * sel;
val = chg_min_uA + reg_data->uA_step * sel;
if (val > chg_max_uA)
return -EINVAL;
@ -70,20 +77,20 @@ static int max77693_chg_get_current_limit(struct regulator_dev *rdev)
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 + CHGIN_ILIM_STEP_20mA * sel < min_uA)
while (chg_min_uA + reg_data->uA_step * sel < min_uA)
sel++;
if (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel > max_uA)
if (chg_min_uA + reg_data->uA_step * sel > max_uA)
return -EINVAL;
/* the first four codes for charger current are all 60mA */
sel += 3;
sel += reg_data->min_sel;
return regmap_write(rdev->regmap,
MAX77693_CHG_REG_CHG_CNFG_09, sel);
return regmap_write(rdev->regmap, reg_data->linear_reg, sel);
}
/* end of CHARGER regulator ops */
@ -145,6 +152,13 @@ static const struct regulator_desc regulators[] = {
},
};
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,
};
static int max77693_pmic_probe(struct platform_device *pdev)
{
struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent);
@ -153,6 +167,7 @@ static int max77693_pmic_probe(struct platform_device *pdev)
config.dev = iodev->dev;
config.regmap = iodev->regmap;
config.driver_data = (void *)&max77693_chg_reg_data;
for (i = 0; i < ARRAY_SIZE(regulators); i++) {
struct regulator_dev *rdev;
@ -170,7 +185,7 @@ static int max77693_pmic_probe(struct platform_device *pdev)
}
static const struct platform_device_id max77693_pmic_id[] = {
{"max77693-pmic", 0},
{ "max77693-pmic", TYPE_MAX77693 },
{},
};