regulator: twl: fix twl6030 regulator is_enabled

With TWL6030, it is not enough to ensure that the regulator is the
group of P1 group (CPU/Linux), but we need to check the state as far
as APP is concerned as well.

Split the current is_enabled to 6030 and 4030 specific ones. This
split impacts few macros and variables as well, but sets up the
stage for further fixes to set_mode and get_status in subsequent
patches.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Saquib Herman <saquib@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@vega.(none)>

1 files changed, 46 insertions, 15 deletions

diff --git a/drivers/regulator/twl-regulator.c b/drivers/regulator/twl-regulator.c
index 821fd4206ad..cae168f0f7b 100644
--- a/drivers/regulator/twl-regulator.c
+++ b/drivers/regulator/twl-regulator.c
@@ -80,6 +80,10 @@ struct twlreg_info {
 #define TWL6030_CFG_STATE_OFF   0x00
 #define TWL6030_CFG_STATE_ON    0x01
 #define TWL6030_CFG_STATE_GRP_SHIFT     5
+#define TWL6030_CFG_STATE_APP_SHIFT     2
+#define TWL6030_CFG_STATE_APP_MASK      (0x03 << TWL6030_CFG_STATE_APP_SHIFT)
+#define TWL6030_CFG_STATE_APP(v)        (((v) & TWL6030_CFG_STATE_APP_MASK) >>\
+                                                TWL6030_CFG_STATE_APP_SHIFT)
 
 static inline int
 twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
@@ -123,18 +127,31 @@ static int twlreg_grp(struct regulator_dev *rdev)
 #define P2_GRP_6030     BIT(1)          /* "peripherals" */
 #define P1_GRP_6030     BIT(0)          /* CPU/Linux */
 
-static int twlreg_is_enabled(struct regulator_dev *rdev)
+static int twl4030reg_is_enabled(struct regulator_dev *rdev)
 {
         int     state = twlreg_grp(rdev);
 
         if (state < 0)
                 return state;
 
-        if (twl_class_is_4030())
-                state &= P1_GRP_4030;
-        else
-                state &= P1_GRP_6030;
-        return state;
+        return state & P1_GRP_4030;
+}
+
+static int twl6030reg_is_enabled(struct regulator_dev *rdev)
+{
+        struct twlreg_info      *info = rdev_get_drvdata(rdev);
+        int                     grp, val;
+
+        grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
+        if (grp < 0)
+                return grp;
+
+        grp &= P1_GRP_6030;
+
+        val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
+        val = TWL6030_CFG_STATE_APP(val);
+
+        return grp && (val == TWL6030_CFG_STATE_ON);
 }
 
 static int twlreg_enable(struct regulator_dev *rdev)
@@ -406,7 +423,7 @@ static struct regulator_ops twl4030ldo_ops = {
 
         .enable         = twlreg_enable,
         .disable        = twlreg_disable,
-        .is_enabled     = twlreg_is_enabled,
+        .is_enabled     = twl4030reg_is_enabled,
 
         .set_mode       = twlreg_set_mode,
 
@@ -464,7 +481,7 @@ static struct regulator_ops twl6030ldo_ops = {
 
         .enable         = twlreg_enable,
         .disable        = twlreg_disable,
-        .is_enabled     = twlreg_is_enabled,
+        .is_enabled     = twl6030reg_is_enabled,
 
         .set_mode       = twlreg_set_mode,
 
@@ -490,14 +507,28 @@ static int twlfixed_get_voltage(struct regulator_dev *rdev)
         return info->min_mV * 1000;
 }
 
-static struct regulator_ops twlfixed_ops = {
+static struct regulator_ops twl4030fixed_ops = {
+        .list_voltage   = twlfixed_list_voltage,
+
+        .get_voltage    = twlfixed_get_voltage,
+
+        .enable         = twlreg_enable,
+        .disable        = twlreg_disable,
+        .is_enabled     = twl4030reg_is_enabled,
+
+        .set_mode       = twlreg_set_mode,
+
+        .get_status     = twlreg_get_status,
+};
+
+static struct regulator_ops twl6030fixed_ops = {
         .list_voltage   = twlfixed_list_voltage,
 
         .get_voltage    = twlfixed_get_voltage,
 
         .enable         = twlreg_enable,
         .disable        = twlreg_disable,
-        .is_enabled     = twlreg_is_enabled,
+        .is_enabled     = twl6030reg_is_enabled,
 
         .set_mode       = twlreg_set_mode,
 
@@ -507,7 +538,7 @@ static struct regulator_ops twlfixed_ops = {
 static struct regulator_ops twl6030_fixed_resource = {
         .enable         = twlreg_enable,
         .disable        = twlreg_disable,
-        .is_enabled     = twlreg_is_enabled,
+        .is_enabled     = twl6030reg_is_enabled,
         .get_status     = twlreg_get_status,
 };
 
@@ -516,10 +547,10 @@ static struct regulator_ops twl6030_fixed_resource = {
 #define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
                         remap_conf) \
                 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
-                        remap_conf, TWL4030)
+                        remap_conf, TWL4030, twl4030fixed_ops)
 #define TWL6030_FIXED_LDO(label, offset, mVolts, num, turnon_delay) \
                 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
-                        0x0, TWL6030)
+                        0x0, TWL6030, twl6030fixed_ops)
 
 #define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) { \
         .base = offset, \
@@ -555,7 +586,7 @@ static struct regulator_ops twl6030_fixed_resource = {
 
 
 #define TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, remap_conf, \
-                family) { \
+                family, operations) { \
         .base = offset, \
         .id = num, \
         .min_mV = mVolts, \
@@ -565,7 +596,7 @@ static struct regulator_ops twl6030_fixed_resource = {
                 .name = #label, \
                 .id = family##_REG_##label, \
                 .n_voltages = 1, \
-                .ops = &twlfixed_ops, \
+                .ops = &operations, \
                 .type = REGULATOR_VOLTAGE, \
                 .owner = THIS_MODULE, \
                 }, \