power: axp818: Add support for DLDO and ELDO regulators

AXP818 provides an array of LDOs to provide power to various peripherals.
None of these regulators are critical.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/power/Kconfig

@@ -167,7 +167,7 @@ config AXP_ALDO4_VOLT
 
 config AXP_DLDO1_VOLT
 	int "axp pmic dldo1 voltage"
-	depends on AXP221_POWER
+	depends on AXP221_POWER || AXP818_POWER
 	default 0
 	---help---
 	Set the voltage (mV) to program the axp pmic dldo1 at, set to 0 to
@@ -177,7 +177,7 @@ config AXP_DLDO1_VOLT
 
 config AXP_DLDO2_VOLT
 	int "axp pmic dldo2 voltage"
-	depends on AXP221_POWER
+	depends on AXP221_POWER || AXP818_POWER
 	default 0
 	---help---
 	Set the voltage (mV) to program the axp pmic dldo2 at, set to 0 to
@@ -185,7 +185,7 @@ config AXP_DLDO2_VOLT
 
 config AXP_DLDO3_VOLT
 	int "axp pmic dldo3 voltage"
-	depends on AXP221_POWER
+	depends on AXP221_POWER || AXP818_POWER
 	default 0
 	---help---
 	Set the voltage (mV) to program the axp pmic dldo3 at, set to 0 to
@@ -201,7 +201,7 @@ config AXP_DLDO4_VOLT
 
 config AXP_ELDO1_VOLT
 	int "axp pmic eldo1 voltage"
-	depends on AXP221_POWER
+	depends on AXP221_POWER || AXP818_POWER
 	default 0
 	---help---
 	Set the voltage (mV) to program the axp pmic eldo1 at, set to 0 to
@@ -209,7 +209,7 @@ config AXP_ELDO1_VOLT
 
 config AXP_ELDO2_VOLT
 	int "axp pmic eldo2 voltage"
-	depends on AXP221_POWER
+	depends on AXP221_POWER || AXP818_POWER
 	default 0
 	---help---
 	Set the voltage (mV) to program the axp pmic eldo2 at, set to 0 to
@@ -217,7 +217,7 @@ config AXP_ELDO2_VOLT
 
 config AXP_ELDO3_VOLT
 	int "axp pmic eldo3 voltage"
-	depends on AXP221_POWER
+	depends on AXP221_POWER || AXP818_POWER
 	default 0
 	---help---
 	Set the voltage (mV) to program the axp pmic eldo3 at, set to 0 to

drivers/power/axp818.c

@@ -110,6 +110,50 @@ int axp_set_dcdc5(unsigned int mvolt)
 				AXP818_OUTPUT_CTRL1_DCDC5_EN);
 }
 
+int axp_set_dldo(int dldo_num, unsigned int mvolt)
+{
+	int ret;
+	u8 cfg;
+
+	if (dldo_num < 1 || dldo_num > 4)
+		return -EINVAL;
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP818_OUTPUT_CTRL2,
+				AXP818_OUTPUT_CTRL2_DLDO1_EN << (dldo_num - 1));
+
+	cfg = axp818_mvolt_to_cfg(mvolt, 700, 3300, 100);
+	if (dldo_num == 2 && mvolt > 3300)
+		cfg += 1 + axp818_mvolt_to_cfg(mvolt, 3400, 4200, 200);
+	ret = pmic_bus_write(AXP818_ELDO1_CTRL + (dldo_num - 1), cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP818_OUTPUT_CTRL2,
+				AXP818_OUTPUT_CTRL2_DLDO1_EN << (dldo_num - 1));
+}
+
+int axp_set_eldo(int eldo_num, unsigned int mvolt)
+{
+	int ret;
+	u8 cfg;
+
+	if (eldo_num < 1 || eldo_num > 3)
+		return -EINVAL;
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP818_OUTPUT_CTRL2,
+				AXP818_OUTPUT_CTRL2_ELDO1_EN << (eldo_num - 1));
+
+	cfg = axp818_mvolt_to_cfg(mvolt, 700, 1900, 50);
+	ret = pmic_bus_write(AXP818_ELDO1_CTRL + (eldo_num - 1), cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP818_OUTPUT_CTRL2,
+				AXP818_OUTPUT_CTRL2_ELDO1_EN << (eldo_num - 1));
+}
+
 int axp_init(void)
 {
 	u8 axp_chip_id;