diff options
Diffstat (limited to 'board/samus/panel.c')
| -rw-r--r-- | board/samus/panel.c | 25 |
1 files changed, 7 insertions, 18 deletions
diff --git a/board/samus/panel.c b/board/samus/panel.c index 5704179d5d..9b62f0e2c9 100644 --- a/board/samus/panel.c +++ b/board/samus/panel.c @@ -61,26 +61,14 @@ DECLARE_HOST_COMMAND(EC_CMD_SWITCH_ENABLE_BKLIGHT, switch_command_enable_backlight, EC_VER_MASK(0)); -/** - * Hook to turn backlight PWM mode on if it turns off. - */ -static void backlight_pwm_mode_hook(void) +void backlight_interrupt(enum gpio_signal signal) { - int reg; - - /* Only check if the system is powered. */ - if (!chipset_in_state(CHIPSET_STATE_ON)) - return; - - /* Read current command reg to see if it is on. */ - i2c_read8(I2C_PORT_BACKLIGHT, I2C_ADDR_BACKLIGHT, - LP8555_REG_COMMAND, ®); - - /* Turn it on if needed. */ - if (!(reg & LP8555_REG_COMMAND_ON)) - lp8555_enable_pwm_mode(); + /* + * PCH indicates it is turning on backlight so we should + * attempt to put the backlight controller into PWM mode. + */ + lp8555_enable_pwm_mode(); } -DECLARE_HOOK(HOOK_SECOND, backlight_pwm_mode_hook, HOOK_PRIO_LAST); /** * Update backlight state. @@ -100,6 +88,7 @@ DECLARE_HOOK(HOOK_LID_CHANGE, update_backlight, HOOK_PRIO_DEFAULT); */ static void backlight_init(void) { + gpio_enable_interrupt(GPIO_PCH_BL_EN); update_backlight(); } DECLARE_HOOK(HOOK_INIT, backlight_init, HOOK_PRIO_DEFAULT); |