| Message ID | 1369190195-14598-1-git-send-email-swarren@wwwdotorg.org (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 6ff26c8..1737256 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -308,6 +308,8 @@ struct spi_master { /* bitmask of supported bits_per_word for transfers */ u32 bits_per_word_mask; +#define SPI_BPW_MASK(bits) BIT((bits) - 1) +#define SPI_BPW_RANGE_MASK(min, max) ((BIT(max) - 1) - (BIT(min) - 1)) /* other constraints relevant to this driver */ u16 flags;
Introduce two macros to make setting up spi_master.bits_per_word_mask easier, and avoid mistakes like writing BIT(n) instead of BIT(n - 1). SPI_BPW_MASK is for a single supported value of bits_per_word_mask. SPI_BPW_RANGE_MASK represents a contiguous set of bit lengths. Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> --- include/linux/spi/spi.h | 2 ++ 1 file changed, 2 insertions(+)