AIROHA_PWM_GPIO_FLASH_PRD_HIGH
duty_tick = FIELD_GET(AIROHA_PWM_GPIO_FLASH_PRD_HIGH, val >> shift);
mask = AIROHA_PWM_GPIO_FLASH_PRD_HIGH << shift;
val = FIELD_PREP(AIROHA_PWM_GPIO_FLASH_PRD_HIGH, duty_ticks) << shift;