PLLA_SWCR2_EN
return ccu_read(common, swcr2) & PLLA_SWCR2_EN;
ccu_update(common, swcr2, PLLA_SWCR2_EN, PLLA_SWCR2_EN);
ccu_update(common, swcr2, PLLA_SWCR2_EN, 0);