sunxi: axp221: Add ELDO[1-3] support
And also add Kconfig option for selecting ELDO3 voltage. The reason
for having this option is that the Android kernel sets ELDO3 to
1.2V when powering up LCD in the case if 'lcd_if' configuration
variable is set to 6 (LCD_IF_EXT_DSI) in the FEX file. Most likely
to supply power for a SSD2828 chip.
However on the MSI Primo81 tablet, which is using this particular
'lcd_if = 6' setup for LCD, setting the ELDO3 voltage appears to
be unnecessary and it works regardless. Having no schematics of
this tablet, I can only guess that 1.2V is supplied to SSD2828
in some other way.
Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/include/axp221.h b/include/axp221.h
index e6639f1..6f24a61 100644
--- a/include/axp221.h
+++ b/include/axp221.h
@@ -26,6 +26,9 @@
#define AXP221_OUTPUT_CTRL1_ALDO1_EN (1 << 6)
#define AXP221_OUTPUT_CTRL1_ALDO2_EN (1 << 7)
#define AXP221_OUTPUT_CTRL2 0x12
+#define AXP221_OUTPUT_CTRL2_ELDO1_EN (1 << 0)
+#define AXP221_OUTPUT_CTRL2_ELDO2_EN (1 << 1)
+#define AXP221_OUTPUT_CTRL2_ELDO3_EN (1 << 2)
#define AXP221_OUTPUT_CTRL2_DLDO1_EN (1 << 3)
#define AXP221_OUTPUT_CTRL2_DLDO2_EN (1 << 4)
#define AXP221_OUTPUT_CTRL2_DLDO3_EN (1 << 5)
@@ -37,6 +40,9 @@
#define AXP221_DLDO2_CTRL 0x16
#define AXP221_DLDO3_CTRL 0x17
#define AXP221_DLDO4_CTRL 0x18
+#define AXP221_ELDO1_CTRL 0x19
+#define AXP221_ELDO2_CTRL 0x1a
+#define AXP221_ELDO3_CTRL 0x1b
#define AXP221_DCDC1_CTRL 0x21
#define AXP221_DCDC2_CTRL 0x22
#define AXP221_DCDC3_CTRL 0x23
@@ -69,6 +75,7 @@
int axp221_set_aldo1(unsigned int mvolt);
int axp221_set_aldo2(unsigned int mvolt);
int axp221_set_aldo3(unsigned int mvolt);
+int axp221_set_eldo(int eldo_num, unsigned int mvolt);
int axp221_init(void);
int axp221_get_sid(unsigned int *sid);
int axp_drivebus_enable(void);