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Subject[PATCH v2 3/9] regulator: max77693: Support different register configurations
Date
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>
---
drivers/regulator/max77693.c | 39 +++++++++++++++++++++++++++------------
1 file changed, 27 insertions(+), 12 deletions(-)

diff --git a/drivers/regulator/max77693.c b/drivers/regulator/max77693.c
index 38722c8311a5..236851ab575a 100644
--- a/drivers/regulator/max77693.c
+++ b/drivers/regulator/max77693.c
@@ -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 },
{},
};

--
2.1.4


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