SAI_XCR_CSR_MASK
regmap_update_bits(sai->regmap, reg, SAI_XCR_VDW_MASK | SAI_XCR_CSR_MASK, val);
#define SAI_XCR_CSR_V(v) ((((v) & SAI_XCR_CSR_MASK) >> 20) + 1)