diff options
| -rw-r--r-- | baseboard/volteer/baseboard.c | 11 | ||||
| -rw-r--r-- | baseboard/volteer/baseboard.h | 2 | ||||
| -rw-r--r-- | board/volteer/gpio.inc | 1 |
3 files changed, 14 insertions, 0 deletions
diff --git a/baseboard/volteer/baseboard.c b/baseboard/volteer/baseboard.c index 813dc3e445..01fc6bbbcd 100644 --- a/baseboard/volteer/baseboard.c +++ b/baseboard/volteer/baseboard.c @@ -191,6 +191,17 @@ const struct pwm_t pwm_channels[] = { .flags = PWM_CONFIG_OPEN_DRAIN, .freq = 25000 }, + [PWM_CH_KBLIGHT] = { + .channel = 3, + .flags = 0, + /* + * Set PWM frequency to multiple of 50 Hz and 60 Hz to prevent + * flicker. Higher frequencies consume similar average power to + * lower PWM frequencies, but higher frequencies record a much + * lower maximum power. + */ + .freq = 2400, + }, }; BUILD_ASSERT(ARRAY_SIZE(pwm_channels) == PWM_CH_COUNT); diff --git a/baseboard/volteer/baseboard.h b/baseboard/volteer/baseboard.h index b978f7baee..c8119edb84 100644 --- a/baseboard/volteer/baseboard.h +++ b/baseboard/volteer/baseboard.h @@ -58,6 +58,7 @@ #define CONFIG_KEYBOARD_KEYPAD #define CONFIG_KEYBOARD_PROTOCOL_8042 #define CONFIG_KEYBOARD_PWRBTN_ASSERTS_KSI2 +#define CONFIG_PWM_KBLIGHT /* Sensors */ @@ -237,6 +238,7 @@ enum pwm_channel { PWM_CH_LED3_RED, PWM_CH_LED4_SIDESEL, PWM_CH_FAN, + PWM_CH_KBLIGHT, PWM_CH_COUNT }; diff --git a/board/volteer/gpio.inc b/board/volteer/gpio.inc index 9ed79228ff..f23d847b38 100644 --- a/board/volteer/gpio.inc +++ b/board/volteer/gpio.inc @@ -161,6 +161,7 @@ GPIO(EC_KSO_02_INV, PIN(1, 7), GPIO_OUT_LOW) /* KSO_02 * ALTERNATE(PIN_MASK(1, 0x7F), 0, MODULE_KEYBOARD_SCAN, GPIO_ODR_HIGH) /* KSO_03-09 */ ALTERNATE(PIN_MASK(0, 0xF0), 0, MODULE_KEYBOARD_SCAN, GPIO_ODR_HIGH) /* KSO_10-13 */ ALTERNATE(PIN_MASK(8, 0x04), 0, MODULE_KEYBOARD_SCAN, GPIO_ODR_HIGH) /* KSO_14 */ +ALTERNATE(PIN_MASK(8, BIT(0)), 0, MODULE_PWM, 0) /* EC_KB_BL_PWM */ /* UART */ ALTERNATE(PIN_MASK(6, BIT(5) | BIT(4)), 0, MODULE_UART, 0) /* UART from EC to Servo */ |