regulator: tps51632 Add VSEL access attribute callback

Added callback to set voltage selector registers access attribute as
volatile or cached.

Bug 1454969

Change-Id: If246f7fe8d35cb99f28f1c07f4653646a141287b
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-on: http://git-master/r/367562
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>

diff --git a/drivers/regulator/tps51632-regulator.c b/drivers/regulator/tps51632-regulator.c
index ff7184069d6ed733e88c94afbc66b63627a35b52..a822730b7fe5afae0632d6c7436347ed600408fa 100644 (file)
--- a/drivers/regulator/tps51632-regulator.c
+++ b/drivers/regulator/tps51632-regulator.c
@@ -4,7 +4,7 @@
  * Regulator driver for TPS51632 3-2-1 Phase D-Cap Step Down Driverless
  * Controller with serial VID control and DVFS.
  *
- * Copyright (c) 2012, NVIDIA Corporation.
+ * Copyright (c) 2012-2014, NVIDIA Corporation.
  *
  * Author: Laxman Dewangan <ldewangan@nvidia.com>
  *
@@ -89,6 +89,7 @@ struct tps51632_chip {
        struct regulator_desc desc;
        struct regulator_dev *rdev;
        struct regmap *regmap;
+       bool vsel_volatile;
 };
 
 static int tps51632_dcdc_set_ramp_delay(struct regulator_dev *rdev,
@@ -210,7 +211,12 @@ skip_pwm_config:
 
 static bool is_volatile_reg(struct device *dev, unsigned int reg)
 {
+       struct tps51632_chip *tps = dev_get_drvdata(dev);
+
        switch (reg) {
+       case TPS51632_VOLTAGE_SELECT_REG:
+       case TPS51632_VOLTAGE_BASE_REG:
+               return tps->vsel_volatile;
        case TPS51632_OFFSET_REG:
        case TPS51632_FAULT_REG:
        case TPS51632_IMON_REG:
@@ -220,6 +226,21 @@ static bool is_volatile_reg(struct device *dev, unsigned int reg)
        }
 }
 
+static int tps51632_reg_volatile_set(struct device *dev, unsigned int reg,
+                                    bool is_volatile)
+{
+       struct tps51632_chip *tps = dev_get_drvdata(dev);
+
+       switch (reg) {
+       case TPS51632_VOLTAGE_SELECT_REG:
+       case TPS51632_VOLTAGE_BASE_REG:
+               tps->vsel_volatile = is_volatile;
+               return 0;
+       default:
+               return -EINVAL;
+       }
+}
+
 static bool is_read_reg(struct device *dev, unsigned int reg)
 {
        switch (reg) {
@@ -251,6 +272,7 @@ static const struct regmap_config tps51632_regmap_config = {
        .writeable_reg          = is_write_reg,
        .readable_reg           = is_read_reg,
        .volatile_reg           = is_volatile_reg,
+       .reg_volatile_set       = tps51632_reg_volatile_set,
        .max_register           = TPS51632_MAX_REG - 1,
        .cache_type             = REGCACHE_RBTREE,
 };