AT91_PMC_SMD_DIV
smddiv = (smdr & AT91_PMC_SMD_DIV) >> SMD_DIV_SHIFT;
regmap_update_bits(smd->regmap, AT91_PMC_SMD, AT91_PMC_SMD_DIV,
#define AT91_PMC_SMDDIV(n) (((n) << 8) & AT91_PMC_SMD_DIV)