regulator: add ab8500 enable and raise time delays

This uses the new infrastructure to provide proper delays when
enabling or setting the voltage of one specific regulator.

Cc: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 30 insertions, 0 deletions

diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c
index d157146c8655..02f3c2333c83 100644
--- a/drivers/regulator/ab8500.c
+++ b/drivers/regulator/ab8500.c
@@ -38,6 +38,7 @@
  * @voltage_mask: mask to control regulator voltage
  * @voltages: supported voltage table
  * @voltages_len: number of supported voltages for the regulator
+ * @delay: startup/set voltage delay in us
  */
 struct ab8500_regulator_info {
         struct device           *dev;
@@ -55,6 +56,7 @@ struct ab8500_regulator_info {
         u8 voltage_mask;
         int const *voltages;
         int voltages_len;
+        unsigned int delay;
 };
 
 /* voltage tables for the vauxn/vintcore supplies */
@@ -290,6 +292,29 @@ static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
         return ret;
 }
 
+static int ab8500_regulator_enable_time(struct regulator_dev *rdev)
+{
+        struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
+
+        return info->delay;
+}
+
+static int ab8500_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
+                                             unsigned int old_sel,
+                                             unsigned int new_sel)
+{
+        struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
+        int ret;
+
+        /* If the regulator isn't on, it won't take time here */
+        ret = ab8500_regulator_is_enabled(rdev);
+        if (ret < 0)
+                return ret;
+        if (!ret)
+                return 0;
+        return info->delay;
+}
+
 static struct regulator_ops ab8500_regulator_ops = {
         .enable         = ab8500_regulator_enable,
         .disable        = ab8500_regulator_disable,
@@ -297,6 +322,8 @@ static struct regulator_ops ab8500_regulator_ops = {
         .get_voltage    = ab8500_regulator_get_voltage,
         .set_voltage    = ab8500_regulator_set_voltage,
         .list_voltage   = ab8500_list_voltage,
+        .enable_time    = ab8500_regulator_enable_time,
+        .set_voltage_time_sel = ab8500_regulator_set_voltage_time_sel,
 };
 
 static int ab8500_fixed_get_voltage(struct regulator_dev *rdev)
@@ -317,6 +344,8 @@ static struct regulator_ops ab8500_regulator_fixed_ops = {
         .is_enabled     = ab8500_regulator_is_enabled,
         .get_voltage    = ab8500_fixed_get_voltage,
         .list_voltage   = ab8500_list_voltage,
+        .enable_time    = ab8500_regulator_enable_time,
+        .set_voltage_time_sel = ab8500_regulator_set_voltage_time_sel,
 };
 
 static struct ab8500_regulator_info
@@ -426,6 +455,7 @@ static struct ab8500_regulator_info
                         .owner          = THIS_MODULE,
                         .n_voltages     = 1,
                 },
+                .delay                  = 10000,
                 .fixed_uV               = 2000000,
                 .update_bank            = 0x03,
                 .update_reg             = 0x80,