[PATCH v4 1/3] regulator: max77686: Replace hard-coded opmode values with defines

[Krzysztof Kozlowski]

Add defines for regulator operating modes which should be more readable,
especially if one does not have Maxim 77686 datasheet.

The patch does not introduce any functional change.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski at samsung.com>
Suggested-by: Javier Martinez Canillas <javier.martinez at collabora.co.uk>
Reviewed-by: Javier Martinez Canillas <javier.martinez at collabora.co.uk>
---
 drivers/regulator/max77686.c | 34 +++++++++++++++++++++++++++-------
 1 file changed, 27 insertions(+), 7 deletions(-)

diff --git a/drivers/regulator/max77686.c b/drivers/regulator/max77686.c
index ef1af2debbd2..3d0922051488 100644
--- a/drivers/regulator/max77686.c
+++ b/drivers/regulator/max77686.c
@@ -45,6 +45,25 @@
 #define MAX77686_DVS_MINUV	600000
 #define MAX77686_DVS_UVSTEP	12500
 
+/* Values used for configuring Buck[1234] */
+#define MAX77686_BUCK_OFF_PWRREQ	0x1
+#define MAX77686_BUCK_LOWPOWER		0x2
+#define MAX77686_BUCK_NORMAL		0x3
+
+/*
+ * Values used for configuring LDOn:
+ *  - LDO1, 3-5, 9, 13, 17-26: forcing low power mode
+ */
+#define MAX77686_LDO_LOWPOWER		0x1
+/*
+ * In the same time for LDOn:
+ *  - LDO2, 6-8, 10-12, 14-16: on/off controlled by PWRREQ
+ */
+#define MAX77686_LDO_OFF_PWRREQ		0x1
+/* Low power mode controlled by PWRREQ */
+#define MAX77686_LDO_LOWPOWER_PWRREQ	0x2
+#define MAX77686_LDO_NORMAL		0x3
+
 #define MAX77686_OPMODE_SHIFT	6
 #define MAX77686_OPMODE_BUCK234_SHIFT	4
 #define MAX77686_OPMODE_MASK	0x3
@@ -76,9 +95,10 @@ static int max77686_buck_set_suspend_disable(struct regulator_dev *rdev)
 	int ret, id = rdev_get_id(rdev);
 
 	if (id == MAX77686_BUCK1)
-		val = 0x1;
+		val = MAX77686_BUCK_OFF_PWRREQ;
 	else
-		val = 0x1 << MAX77686_OPMODE_BUCK234_SHIFT;
+		val = MAX77686_BUCK_OFF_PWRREQ
+			<< MAX77686_OPMODE_BUCK234_SHIFT;
 
 	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 				 rdev->desc->enable_mask, val);
@@ -103,10 +123,10 @@ static int max77686_set_suspend_mode(struct regulator_dev *rdev,
 
 	switch (mode) {
 	case REGULATOR_MODE_IDLE:			/* ON in LP Mode */
-		val = 0x2 << MAX77686_OPMODE_SHIFT;
+		val = MAX77686_LDO_LOWPOWER_PWRREQ << MAX77686_OPMODE_SHIFT;
 		break;
 	case REGULATOR_MODE_NORMAL:			/* ON in Normal Mode */
-		val = 0x3 << MAX77686_OPMODE_SHIFT;
+		val = MAX77686_LDO_NORMAL << MAX77686_OPMODE_SHIFT;
 		break;
 	default:
 		pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
@@ -133,13 +153,13 @@ static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
 
 	switch (mode) {
 	case REGULATOR_MODE_STANDBY:			/* switch off */
-		val = 0x1 << MAX77686_OPMODE_SHIFT;
+		val = MAX77686_LDO_OFF_PWRREQ << MAX77686_OPMODE_SHIFT;
 		break;
 	case REGULATOR_MODE_IDLE:			/* ON in LP Mode */
-		val = 0x2 << MAX77686_OPMODE_SHIFT;
+		val = MAX77686_LDO_LOWPOWER_PWRREQ << MAX77686_OPMODE_SHIFT;
 		break;
 	case REGULATOR_MODE_NORMAL:			/* ON in Normal Mode */
-		val = 0x3 << MAX77686_OPMODE_SHIFT;
+		val = MAX77686_LDO_NORMAL << MAX77686_OPMODE_SHIFT;
 		break;
 	default:
 		pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
-- 
1.9.1