Snippet from drivers/mfd/wl1273-core.c

/* I2S mode */
#define WL1273_IS2_WIDTH_32 0x0
#define WL1273_IS2_WIDTH_40 0x1
#define WL1273_IS2_WIDTH_22_23  0x2
#define WL1273_IS2_WIDTH_23_22  0x3
#define WL1273_IS2_WIDTH_48 0x4
#define WL1273_IS2_WIDTH_50 0x5
#define WL1273_IS2_WIDTH_60 0x6
#define WL1273_IS2_WIDTH_64 0x7
#define WL1273_IS2_WIDTH_80 0x8
#define WL1273_IS2_WIDTH_96 0x9
#define WL1273_IS2_WIDTH_128    0xa
#define WL1273_IS2_WIDTH    0xf

#define WL1273_IS2_FORMAT_STD   (0x0 << 4)
#define WL1273_IS2_FORMAT_LEFT  (0x1 << 4)
#define WL1273_IS2_FORMAT_RIGHT (0x2 << 4)
#define WL1273_IS2_FORMAT_USER  (0x3 << 4)

#define WL1273_IS2_MASTER   (0x0 << 6)
#define WL1273_IS2_SLAVEW   (0x1 << 6)

#define WL1273_IS2_TRI_AFTER_SENDING    (0x0 << 7)
#define WL1273_IS2_TRI_ALWAYS_ACTIVE    (0x1 << 7)

#define WL1273_IS2_SDOWS_RR (0x0 << 8)
#define WL1273_IS2_SDOWS_RF (0x1 << 8)
#define WL1273_IS2_SDOWS_FR (0x2 << 8)
#define WL1273_IS2_SDOWS_FF (0x3 << 8)

#define WL1273_IS2_TRI_OPT  (0x0 << 10)
#define WL1273_IS2_TRI_ALWAYS   (0x1 << 10)

#define WL1273_IS2_RATE_48K (0x0 << 12)
#define WL1273_IS2_RATE_44_1K   (0x1 << 12)
#define WL1273_IS2_RATE_32K (0x2 << 12)
#define WL1273_IS2_RATE_22_05K  (0x4 << 12)
#define WL1273_IS2_RATE_16K (0x5 << 12)
#define WL1273_IS2_RATE_12K (0x8 << 12)
#define WL1273_IS2_RATE_11_025  (0x9 << 12)
#define WL1273_IS2_RATE_8K  (0xa << 12)
#define WL1273_IS2_RATE     (0xf << 12)

#define WL1273_I2S_DEF_MODE (WL1273_IS2_WIDTH_32 | \
                 WL1273_IS2_FORMAT_STD | \
                 WL1273_IS2_MASTER | \
                 WL1273_IS2_TRI_AFTER_SENDING | \
                 WL1273_IS2_SDOWS_RR | \
                 WL1273_IS2_TRI_OPT | \
                 WL1273_IS2_RATE_48K)