PWM_ASPEED_CTRL_CLK_DIV_L
div_l = FIELD_GET(PWM_ASPEED_CTRL_CLK_DIV_L, val);
(FIELD_MAX(PWM_ASPEED_CTRL_CLK_DIV_L) + 1);
val &= ~(PWM_ASPEED_CTRL_CLK_DIV_H | PWM_ASPEED_CTRL_CLK_DIV_L |
FIELD_PREP(PWM_ASPEED_CTRL_CLK_DIV_L, div_l) |