regulator: s5m8767: Add symbols for hard-coded DVS_RAMP register

Add symbols for hard-coded values of BUCK_RAMP field in DVS_RAMP
register. This simplifies a little the code as register update is called
only once.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/regulator/s5m8767.c

@@ -881,31 +881,29 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
 
 	if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
 		|| s5m8767->buck4_ramp) {
+		unsigned int val;
 		switch (s5m8767->ramp_delay) {
 		case 5:
-			sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
-					0x40, 0xf0);
+			val = S5M8767_DVS_BUCK_RAMP_5;
 			break;
 		case 10:
-			sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
-					0x90, 0xf0);
+			val = S5M8767_DVS_BUCK_RAMP_10;
 			break;
 		case 25:
-			sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
-					0xd0, 0xf0);
+			val = S5M8767_DVS_BUCK_RAMP_25;
 			break;
 		case 50:
-			sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
-					0xe0, 0xf0);
+			val = S5M8767_DVS_BUCK_RAMP_50;
 			break;
 		case 100:
-			sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
-					0xf0, 0xf0);
+			val = S5M8767_DVS_BUCK_RAMP_100;
 			break;
 		default:
-			sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
-					0x90, 0xf0);
+			val = S5M8767_DVS_BUCK_RAMP_10;
 		}
+		sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
+					val << S5M8767_DVS_BUCK_RAMP_SHIFT,
+					S5M8767_DVS_BUCK_RAMP_MASK);
 	}
 
 	for (i = 0; i < pdata->num_regulators; i++) {

include/linux/mfd/samsung/s5m8767.h

@@ -186,4 +186,19 @@ enum s5m8767_regulators {
 #define S5M8767_ENCTRL_SHIFT		6
 #define S5M8767_ENCTRL_MASK		(0x3 << S5M8767_ENCTRL_SHIFT)
 
+/*
+ * Values for BUCK_RAMP field in DVS_RAMP register, matching raw values
+ * in mV/us.
+ */
+enum s5m8767_dvs_buck_ramp_values {
+	S5M8767_DVS_BUCK_RAMP_5		= 0x4,
+	S5M8767_DVS_BUCK_RAMP_10	= 0x9,
+	S5M8767_DVS_BUCK_RAMP_12_5	= 0xb,
+	S5M8767_DVS_BUCK_RAMP_25	= 0xd,
+	S5M8767_DVS_BUCK_RAMP_50	= 0xe,
+	S5M8767_DVS_BUCK_RAMP_100	= 0xf,
+};
+#define S5M8767_DVS_BUCK_RAMP_SHIFT	4
+#define S5M8767_DVS_BUCK_RAMP_MASK	(0xf << S5M8767_DVS_BUCK_RAMP_SHIFT)
+
 #endif /* __LINUX_MFD_S5M8767_H */