regulator: fan52555: add support for fan53528 fan

drivers/regulator/fan53555.c

@@ -56,6 +56,11 @@
 #define CTL_MODE_VSEL0_MODE	BIT(0)
 #define CTL_MODE_VSEL1_MODE	BIT(1)
 
+#define FAN53528_CTL_MODE_MASK		0x3
+#define FAN53528_CTL_MODE_FPWM		(BIT(1) | BIT(0))
+#define FAN53528_CTL_MODE_AUTFPWM	0x0
+#define FAN53528_VOLTAGE_MASK	0x7F
+
 #define FAN53555_NVOLTAGES	64	/* Numbers of voltages */
 #define FAN53526_NVOLTAGES	128
 #define RK8602_NVOLTAGES	160
@@ -67,6 +72,7 @@
 
 enum fan53555_vendor {
 	FAN53526_VENDOR_FAIRCHILD = 0,
+	FAN53528_VENDOR_FAIRCHILD,
 	FAN53555_VENDOR_FAIRCHILD,
 	FAN53555_VENDOR_ROCKCHIP,	/* RK8600, RK8601 */
 	RK8602_VENDOR_ROCKCHIP,		/* RK8602, RK8603 */
@@ -161,8 +167,12 @@ static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 	ret = regulator_map_voltage_linear(rdev, uV, uV);
 	if (ret < 0)
 		return ret;
-	ret = regmap_update_bits(rdev->regmap, di->sleep_reg,
-				 di->desc.vsel_mask, ret);
+	if (di->vendor == FAN53528_VENDOR_FAIRCHILD)
+			ret = regmap_update_bits(rdev->regmap, di->sleep_reg,
+					FAN53528_VOLTAGE_MASK, ret);
+	else
+		ret = regmap_update_bits(rdev->regmap, di->sleep_reg,
+					di->desc.vsel_mask, ret);
 	if (ret < 0)
 		return ret;
 	/* Cache the sleep voltage setting.
@@ -194,11 +204,21 @@ static int fan53555_set_mode(struct regulator_dev *rdev, unsigned int mode)
 
 	switch (mode) {
 	case REGULATOR_MODE_FAST:
-		regmap_update_bits(rdev->regmap, di->mode_reg,
-				   di->mode_mask, di->mode_mask);
+		if (di->vendor == FAN53528_VENDOR_FAIRCHILD)
+			regmap_update_bits(rdev->regmap, FAN53555_CONTROL,
+						 FAN53528_CTL_MODE_MASK,
+						 FAN53528_CTL_MODE_FPWM);
+		else
+			regmap_update_bits(rdev->regmap, di->mode_reg,
+					di->mode_mask, di->mode_mask);
 		break;
 	case REGULATOR_MODE_NORMAL:
-		regmap_update_bits(rdev->regmap, di->vol_reg, di->mode_mask, 0);
+		if (di->vendor == FAN53528_VENDOR_FAIRCHILD)
+			regmap_update_bits(di->regmap, FAN53555_CONTROL,
+						 FAN53528_CTL_MODE_MASK,
+						 FAN53528_CTL_MODE_AUTFPWM);
+		else
+			regmap_update_bits(rdev->regmap, di->vol_reg, di->mode_mask, 0);
 		break;
 	default:
 		return -EINVAL;
@@ -212,6 +232,17 @@ static unsigned int fan53555_get_mode(struct regulator_dev *rdev)
 	unsigned int val;
 	int ret = 0;
 
+	if (di->vendor == FAN53528_VENDOR_FAIRCHILD) {
+		ret = regmap_read(di->regmap, FAN53555_CONTROL, &val);
+		if (ret < 0)
+			return ret;
+		if ((val & FAN53528_CTL_MODE_MASK) == FAN53528_CTL_MODE_FPWM)
+			return REGULATOR_MODE_FAST;
+		else
+			return REGULATOR_MODE_NORMAL;
+		return 0;
+	}
+
 	ret = regmap_read(rdev->regmap, di->mode_reg, &val);
 	if (ret < 0)
 		return ret;
@@ -610,6 +641,13 @@ static int fan53555_regulator_register(struct fan53555_device_info *di,
 	rdesc->enable_time = di->enable_time;
 	rdesc->owner = THIS_MODULE;
 
+	if (di->vendor == FAN53528_VENDOR_FAIRCHILD) {
+		rdesc->name = "fan53528-reg";
+		rdesc->n_voltages = FAN53526_NVOLTAGES;
+		rdesc->vsel_mask = FAN53528_VOLTAGE_MASK;
+	};
+
+
 	rdev = devm_regulator_register(di->dev, &di->desc, config);
 	return PTR_ERR_OR_ZERO(rdev);
 }
@@ -645,6 +683,9 @@ static const struct of_device_id __maybe_unused fan53555_dt_ids[] = {
 	{
 		.compatible = "fcs,fan53526",
 		.data = (void *)FAN53526_VENDOR_FAIRCHILD,
+	}, {
+		.compatible = "fcs,fan53528",
+		.data = (void *)FAN53528_VENDOR_FAIRCHILD,
 	}, {
 		.compatible = "fcs,fan53555",
 		.data = (void *)FAN53555_VENDOR_FAIRCHILD
@@ -752,6 +793,9 @@ static const struct i2c_device_id fan53555_id[] = {
 	{
 		.name = "fan53526",
 		.driver_data = FAN53526_VENDOR_FAIRCHILD
+	}, {
+		.name = "fan53528",
+		.driver_data = FAN53528_VENDOR_FAIRCHILD
 	}, {
 		.name = "fan53555",
 		.driver_data = FAN53555_VENDOR_FAIRCHILD