diff options
Diffstat (limited to 'board/daisy/board.c')
| -rw-r--r-- | board/daisy/board.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/board/daisy/board.c b/board/daisy/board.c index 2d09a79a04..f8612a1231 100644 --- a/board/daisy/board.c +++ b/board/daisy/board.c @@ -9,8 +9,10 @@ #include "dma.h" #include "i2c.h" #include "gpio.h" +#include "pmu_tpschrome.h" #include "registers.h" #include "spi.h" +#include "task.h" #include "util.h" /* @@ -195,3 +197,35 @@ void board_keyboard_suppress_noise(void) gpio_set_level(GPIO_CODEC_INT, 0); gpio_set_level(GPIO_CODEC_INT, 1); } + +int board_get_ac(void) +{ + /* + * Detect AC state using combined gpio pins + * + * On daisy and snow, there's no single gpio signal to detect AC. + * GPIO_AC_PWRBTN_L provides AC on and PWRBTN release. + * GPIO_KB_PWR_ON_L provides PWRBTN release. + * + * When AC plugged, both GPIOs will be high. + * + * One drawback of this detection is, when press-and-hold power + * button. AC state will be unknown. This function will fallback + * to PMU VACG. + */ + + int ac_good = 1, battery_good; + + if (gpio_get_level(GPIO_KB_PWR_ON_L)) + return gpio_get_level(GPIO_AC_PWRBTN_L); + + /* Check PMU VACG */ + if (!in_interrupt_context()) + pmu_get_power_source(&ac_good, &battery_good); + + /* + * Charging task only interacts with AP in discharging state. So + * return 1 when AC status can not be detected by GPIO or VACG. + */ + return ac_good; +} |