diff options
| author | Chen-Yu Tsai | 2015-03-09 15:44:15 +0800 |
|---|---|---|
| committer | Hans de Goede | 2015-03-10 15:20:25 +0100 |
| commit | 1986c4ca0b250c83434aae985e74e05f96ccb1a4 (patch) | |
| tree | 98f67cdd2a0cf2c70a8621899e8976c3ec2b86ca | |
| parent | 5112703fddb0e851a11c6bc7722973522346e503 (diff) | |
sunxi: axp221: Add VBUS detection support
Some of the AXP PMICs support VBUS detection, i.e. checking whether
VBUS power input is available and usable (supplied by an external
source). A few boards use this instead of a separate GPIO to detect
VBUS on USB OTG.
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>
| -rw-r--r-- | drivers/power/axp221.c | 16 | ||||
| -rw-r--r-- | include/axp221.h | 7 |
2 files changed, 23 insertions, 0 deletions
diff --git a/drivers/power/axp221.c b/drivers/power/axp221.c index 3e07f23c20c..c2c3988804b 100644 --- a/drivers/power/axp221.c +++ b/drivers/power/axp221.c @@ -385,6 +385,22 @@ int axp221_get_sid(unsigned int *sid) return 0; } +int axp_get_vbus(void) +{ + int ret; + u8 val; + + ret = axp221_init(); + if (ret) + return ret; + + ret = pmic_bus_read(AXP221_POWER_STATUS, &val); + if (ret) + return ret; + + return (val & AXP221_POWER_STATUS_VBUS_USABLE) ? 1 : 0; +} + static int axp_drivebus_setup(void) { int ret; diff --git a/include/axp221.h b/include/axp221.h index a20e25c2f82..be6058e4395 100644 --- a/include/axp221.h +++ b/include/axp221.h @@ -14,6 +14,9 @@ #define AXP223_RUNTIME_ADDR 0x2d /* Page 0 addresses */ +#define AXP221_POWER_STATUS 0x00 +#define AXP221_POWER_STATUS_VBUS_AVAIL (1 << 5) +#define AXP221_POWER_STATUS_VBUS_USABLE (1 << 4) #define AXP221_CHIP_ID 0x03 #define AXP221_OUTPUT_CTRL1 0x10 #define AXP221_OUTPUT_CTRL1_DCDC0_EN (1 << 0) @@ -59,6 +62,9 @@ /* Page 1 addresses */ #define AXP221_SID 0x20 +/* We support vbus detection */ +#define AXP_VBUS_DETECT + /* We support drivebus control */ #define AXP_DRIVEBUS @@ -77,5 +83,6 @@ 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_get_vbus(void); int axp_drivebus_enable(void); int axp_drivebus_disable(void); |