IGU_PF_CONF_FUNC_EN
val |= IGU_PF_CONF_FUNC_EN;
val &= ~IGU_PF_CONF_FUNC_EN;
u32 pf_conf = IGU_PF_CONF_FUNC_EN;
u32 igu_pf_conf = IGU_PF_CONF_FUNC_EN | IGU_PF_CONF_ATTN_BIT_EN;
u32 igu_pf_conf = IGU_PF_CONF_FUNC_EN;