regulator: max77686: Implement .set_ramp_delay() callback

This patch implements the .set_ramp_delay callback to set the ramp_delay on
hardware for BUCK2/3/4 if ramp_delay is set in regulator constraints.

This patch also do some cleaning work for unrequired members of
struct max77686_data.

Signed-off-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 29 insertions, 8 deletions

diff --git a/drivers/regulator/max77686.c b/drivers/regulator/max77686.c
index 877d4bff1120..23f956a6c5f2 100644
--- a/drivers/regulator/max77686.c
+++ b/drivers/regulator/max77686.c
@@ -65,11 +65,34 @@ enum max77686_ramp_rate {
 };
 
 struct max77686_data {
-        struct device *dev;
-        struct max77686_dev *iodev;
         struct regulator_dev **rdev;
 };
 
+static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
+{
+        unsigned int ramp_value = RAMP_RATE_NO_CTRL;
+
+        switch (ramp_delay) {
+        case 1 ... 13750:
+                ramp_value = RAMP_RATE_13P75MV;
+                break;
+        case 13751 ... 27500:
+                ramp_value = RAMP_RATE_27P5MV;
+                break;
+        case 27501 ... 55000:
+                ramp_value = RAMP_RATE_55MV;
+                break;
+        case 55001 ... 100000:
+                break;
+        default:
+                pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
+                        rdev->desc->name, ramp_delay);
+        }
+
+        return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+                                  MAX77686_RAMP_RATE_MASK, ramp_value << 6);
+}
+
 static struct regulator_ops max77686_ops = {
         .list_voltage           = regulator_list_voltage_linear,
         .map_voltage            = regulator_map_voltage_linear,
@@ -90,6 +113,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
+        .set_ramp_delay         = max77686_set_ramp_delay,
 };
 
 #define regulator_desc_ldo(num)         {                               \
@@ -238,20 +262,17 @@ static __devinit int max77686_pmic_probe(struct platform_device *pdev)
                 return -ENOMEM;
 
         rdev = max77686->rdev;
-        max77686->dev = &pdev->dev;
-        max77686->iodev = iodev;
+        config.dev = &pdev->dev;
+        config.regmap = iodev->regmap;
         platform_set_drvdata(pdev, max77686);
 
         for (i = 0; i < MAX77686_REGULATORS; i++) {
-                config.dev = max77686->dev;
-                config.regmap = iodev->regmap;
-                config.driver_data = max77686;
                 config.init_data = pdata->regulators[i].initdata;
 
                 rdev[i] = regulator_register(&regulators[i], &config);
                 if (IS_ERR(rdev[i])) {
                         ret = PTR_ERR(rdev[i]);
-                        dev_err(max77686->dev,
+                        dev_err(&pdev->dev,
                                 "regulator init failed for %d\n", i);
                                 rdev[i] = NULL;
                                 goto err;