sunxi: axp221: Explicitly turn off unused voltages

Explicitly turn off unused voltages, rather then leaving them as is. Likewise
explictly enabled the dcdc convertors, rather then assuming they are already
enabled at boot.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

4 files changed, 111 insertions, 25 deletions

diff --git a/board/sunxi/board.c b/board/sunxi/board.c
index e2ebf83..5bf19b7 100644
--- a/board/sunxi/board.c
+++ b/board/sunxi/board.c
@@ -180,22 +180,12 @@ void sunxi_board_init(void)
 	power_failed |= axp221_set_dcdc3(1200);
 	power_failed |= axp221_set_dcdc4(1200);
 	power_failed |= axp221_set_dcdc5(1500);
-#if CONFIG_AXP221_DLDO1_VOLT != -1
 	power_failed |= axp221_set_dldo1(CONFIG_AXP221_DLDO1_VOLT);
-#endif
-#if CONFIG_AXP221_DLDO4_VOLT != -1
 	power_failed |= axp221_set_dldo4(CONFIG_AXP221_DLDO4_VOLT);
-#endif
-#if CONFIG_AXP221_ALDO1_VOLT != -1
 	power_failed |= axp221_set_aldo1(CONFIG_AXP221_ALDO1_VOLT);
-#endif
-#if CONFIG_AXP221_ALDO2_VOLT != -1
 	power_failed |= axp221_set_aldo2(CONFIG_AXP221_ALDO2_VOLT);
-#endif
-#if CONFIG_AXP221_ALDO3_VOLT != -1
 	power_failed |= axp221_set_aldo3(CONFIG_AXP221_ALDO3_VOLT);
 #endif
-#endif
 
 	printf("DRAM:");
 	ramsize = sunxi_dram_init();
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index e132759..ef0c093 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -19,9 +19,9 @@ config AXP221_DCDC1_VOLT
 config AXP221_DLDO1_VOLT
 	int "axp221 dldo1 voltage"
 	depends on AXP221_POWER
-	default -1
+	default 0
 	---help---
-	Set the voltage (mV) to program the axp221 dldo1 at, set to -1 to
+	Set the voltage (mV) to program the axp221 dldo1 at, set to 0 to
 	disable dldo1. On sun6i (A31) boards with ethernet this is often used
 	to power the ethernet phy. On sun8i (A23) boards this is often used to
 	power the wifi.
@@ -29,17 +29,17 @@ config AXP221_DLDO1_VOLT
 config AXP221_DLDO4_VOLT
 	int "axp221 dldo4 voltage"
 	depends on AXP221_POWER
-	default -1
+	default 0
 	---help---
-	Set the voltage (mV) to program the axp221 dldo4 at, set to -1 to
+	Set the voltage (mV) to program the axp221 dldo4 at, set to 0 to
 	disable dldo4.
 
 config AXP221_ALDO1_VOLT
 	int "axp221 aldo1 voltage"
 	depends on AXP221_POWER
-	default -1
+	default 0
 	---help---
-	Set the voltage (mV) to program the axp221 aldo1 at, set to -1 to
+	Set the voltage (mV) to program the axp221 aldo1 at, set to 0 to
 	disable aldo1. On sun6i (A31) boards which have a wifi module this is
 	often used to power the wifi module.
 
@@ -49,7 +49,7 @@ config AXP221_ALDO2_VOLT
 	default 1800 if MACH_SUN6I
 	default 2500 if MACH_SUN8I
 	---help---
-	Set the voltage (mV) to program the axp221 aldo2 at, set to -1 to
+	Set the voltage (mV) to program the axp221 aldo2 at, set to 0 to
 	disable aldo2. On sun6i (A31) boards this is typically connected to
 	VCC-PM, which powers the port M gpios, and should be set to 1.8V.
 	On sun8i (A23) this is typically connected to VDD-DLL and must be
@@ -60,6 +60,6 @@ config AXP221_ALDO3_VOLT
 	depends on AXP221_POWER
 	default 3000
 	---help---
-	Set the voltage (mV) to program the axp221 aldo3 at, set to -1 to
+	Set the voltage (mV) to program the axp221 aldo3 at, set to 0 to
 	disable aldo3. This is typically connected to VCC-PLL and AVCC and
 	must be set to 3V.
diff --git a/drivers/power/axp221.c b/drivers/power/axp221.c
index 4667579..1fda19a 100644
--- a/drivers/power/axp221.c
+++ b/drivers/power/axp221.c
@@ -80,45 +80,107 @@ static int axp221_setbits(u8 reg, u8 bits)
 	return pmic_bus_write(reg, val);
 }
 
+static int axp221_clrbits(u8 reg, u8 bits)
+{
+	int ret;
+	u8 val;
+
+	ret = pmic_bus_read(reg, &val);
+	if (ret)
+		return ret;
+
+	val &= ~bits;
+	return pmic_bus_write(reg, val);
+}
+
 int axp221_set_dcdc1(unsigned int mvolt)
 {
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 1600, 3400, 100);
 
+	if (mvolt == 0)
+		return axp221_clrbits(AXP221_OUTPUT_CTRL1,
+				      AXP221_OUTPUT_CTRL1_DCDC1_EN);
+
 	ret = pmic_bus_write(AXP221_DCDC1_CTRL, cfg);
 	if (ret)
 		return ret;
 
-	return axp221_setbits(AXP221_OUTPUT_CTRL2,
-			      AXP221_OUTPUT_CTRL2_DCDC1_EN);
+	ret = axp221_setbits(AXP221_OUTPUT_CTRL2,
+			     AXP221_OUTPUT_CTRL2_DCDC1SW_EN);
+	if (ret)
+		return ret;
+
+	return axp221_setbits(AXP221_OUTPUT_CTRL1,
+			      AXP221_OUTPUT_CTRL1_DCDC1_EN);
 }
 
 int axp221_set_dcdc2(unsigned int mvolt)
 {
+	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1540, 20);
 
-	return pmic_bus_write(AXP221_DCDC2_CTRL, cfg);
+	if (mvolt == 0)
+		return axp221_clrbits(AXP221_OUTPUT_CTRL1,
+				      AXP221_OUTPUT_CTRL1_DCDC2_EN);
+
+	ret = pmic_bus_write(AXP221_DCDC2_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return axp221_setbits(AXP221_OUTPUT_CTRL1,
+			      AXP221_OUTPUT_CTRL1_DCDC2_EN);
 }
 
 int axp221_set_dcdc3(unsigned int mvolt)
 {
+	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1860, 20);
 
-	return pmic_bus_write(AXP221_DCDC3_CTRL, cfg);
+	if (mvolt == 0)
+		return axp221_clrbits(AXP221_OUTPUT_CTRL1,
+				      AXP221_OUTPUT_CTRL1_DCDC3_EN);
+
+	ret = pmic_bus_write(AXP221_DCDC3_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return axp221_setbits(AXP221_OUTPUT_CTRL1,
+			      AXP221_OUTPUT_CTRL1_DCDC3_EN);
 }
 
 int axp221_set_dcdc4(unsigned int mvolt)
 {
+	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1540, 20);
 
-	return pmic_bus_write(AXP221_DCDC4_CTRL, cfg);
+	if (mvolt == 0)
+		return axp221_clrbits(AXP221_OUTPUT_CTRL1,
+				      AXP221_OUTPUT_CTRL1_DCDC4_EN);
+
+	ret = pmic_bus_write(AXP221_DCDC4_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return axp221_setbits(AXP221_OUTPUT_CTRL1,
+			      AXP221_OUTPUT_CTRL1_DCDC4_EN);
 }
 
 int axp221_set_dcdc5(unsigned int mvolt)
 {
+	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 1000, 2550, 50);
 
-	return pmic_bus_write(AXP221_DCDC5_CTRL, cfg);
+	if (mvolt == 0)
+		return axp221_clrbits(AXP221_OUTPUT_CTRL1,
+				      AXP221_OUTPUT_CTRL1_DCDC5_EN);
+
+	ret = pmic_bus_write(AXP221_DCDC5_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return axp221_setbits(AXP221_OUTPUT_CTRL1,
+			      AXP221_OUTPUT_CTRL1_DCDC5_EN);
 }
 
 int axp221_set_dldo1(unsigned int mvolt)
@@ -126,6 +188,10 @@ int axp221_set_dldo1(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 
+	if (mvolt == 0)
+		return axp221_clrbits(AXP221_OUTPUT_CTRL2,
+				      AXP221_OUTPUT_CTRL2_DLDO1_EN);
+
 	ret = pmic_bus_write(AXP221_DLDO1_CTRL, cfg);
 	if (ret)
 		return ret;
@@ -139,6 +205,10 @@ int axp221_set_dldo2(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 
+	if (mvolt == 0)
+		return axp221_clrbits(AXP221_OUTPUT_CTRL2,
+				      AXP221_OUTPUT_CTRL2_DLDO2_EN);
+
 	ret = pmic_bus_write(AXP221_DLDO2_CTRL, cfg);
 	if (ret)
 		return ret;
@@ -152,6 +222,10 @@ int axp221_set_dldo3(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 
+	if (mvolt == 0)
+		return axp221_clrbits(AXP221_OUTPUT_CTRL2,
+				      AXP221_OUTPUT_CTRL2_DLDO3_EN);
+
 	ret = pmic_bus_write(AXP221_DLDO3_CTRL, cfg);
 	if (ret)
 		return ret;
@@ -165,6 +239,10 @@ int axp221_set_dldo4(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 
+	if (mvolt == 0)
+		return axp221_clrbits(AXP221_OUTPUT_CTRL2,
+				      AXP221_OUTPUT_CTRL2_DLDO4_EN);
+
 	ret = pmic_bus_write(AXP221_DLDO4_CTRL, cfg);
 	if (ret)
 		return ret;
@@ -178,6 +256,10 @@ int axp221_set_aldo1(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 
+	if (mvolt == 0)
+		return axp221_clrbits(AXP221_OUTPUT_CTRL1,
+				      AXP221_OUTPUT_CTRL1_ALDO1_EN);
+
 	ret = pmic_bus_write(AXP221_ALDO1_CTRL, cfg);
 	if (ret)
 		return ret;
@@ -191,6 +273,10 @@ int axp221_set_aldo2(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 
+	if (mvolt == 0)
+		return axp221_clrbits(AXP221_OUTPUT_CTRL1,
+				      AXP221_OUTPUT_CTRL1_ALDO2_EN);
+
 	ret = pmic_bus_write(AXP221_ALDO2_CTRL, cfg);
 	if (ret)
 		return ret;
@@ -204,6 +290,10 @@ int axp221_set_aldo3(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 
+	if (mvolt == 0)
+		return axp221_clrbits(AXP221_OUTPUT_CTRL3,
+				      AXP221_OUTPUT_CTRL3_ALDO3_EN);
+
 	ret = pmic_bus_write(AXP221_ALDO3_CTRL, cfg);
 	if (ret)
 		return ret;
diff --git a/include/axp221.h b/include/axp221.h
index 8df811a..e9552f6 100644
--- a/include/axp221.h
+++ b/include/axp221.h
@@ -17,6 +17,12 @@
 /* Page 0 addresses */
 #define AXP221_CHIP_ID		0x03
 #define AXP221_OUTPUT_CTRL1	0x10
+#define AXP221_OUTPUT_CTRL1_DCDC0_EN	(1 << 0)
+#define AXP221_OUTPUT_CTRL1_DCDC1_EN	(1 << 1)
+#define AXP221_OUTPUT_CTRL1_DCDC2_EN	(1 << 2)
+#define AXP221_OUTPUT_CTRL1_DCDC3_EN	(1 << 3)
+#define AXP221_OUTPUT_CTRL1_DCDC4_EN	(1 << 4)
+#define AXP221_OUTPUT_CTRL1_DCDC5_EN	(1 << 5)
 #define AXP221_OUTPUT_CTRL1_ALDO1_EN	(1 << 6)
 #define AXP221_OUTPUT_CTRL1_ALDO2_EN	(1 << 7)
 #define AXP221_OUTPUT_CTRL2	0x12
@@ -24,7 +30,7 @@
 #define AXP221_OUTPUT_CTRL2_DLDO2_EN	(1 << 4)
 #define AXP221_OUTPUT_CTRL2_DLDO3_EN	(1 << 5)
 #define AXP221_OUTPUT_CTRL2_DLDO4_EN	(1 << 6)
-#define AXP221_OUTPUT_CTRL2_DCDC1_EN	(1 << 7)
+#define AXP221_OUTPUT_CTRL2_DCDC1SW_EN	(1 << 7)
 #define AXP221_OUTPUT_CTRL3	0x13
 #define AXP221_OUTPUT_CTRL3_ALDO3_EN	(1 << 7)
 #define AXP221_DLDO1_CTRL	0x15