diff options
| author | Illia Smyrnov <illia.smyrnov@ti.com> | 2013-06-14 16:12:07 (GMT) |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-06-17 09:13:29 (GMT) |
| commit | 56cd5c1578135120d73a7054140855728f8cca36 (patch) | |
| tree | bd3b9af0fadf61034e56601f8de30bc0eaa259a4 /drivers/spi/spi-omap2-mcspi.c | |
| parent | 0514dd76ea556859d398aaff725817e1c97579ea (diff) | |
| download | linux-56cd5c1578135120d73a7054140855728f8cca36.tar.xz | |
spi: omap2-mcspi: Move bytes per word calculation to the function
Introduce mcspi_bytes_per_word function as replacement for the next code
fragment:
int c = (word_len <= 8) ? 1 :
(word_len <= 16) ? 2 :
/* word_len <= 32 */ 4;
This code used 2 times in current driver code and will be used 2 times in
the next FIFO buffer support patch. Replace it with inline function with clear
name to improve code legibility.
Signed-off-by: Illia Smyrnov <illia.smyrnov@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi/spi-omap2-mcspi.c')
| -rw-r--r-- | drivers/spi/spi-omap2-mcspi.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index 000922a..5a93a0d 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -186,6 +186,16 @@ static inline void mcspi_write_chconf0(const struct spi_device *spi, u32 val) mcspi_read_cs_reg(spi, OMAP2_MCSPI_CHCONF0); } +static inline int mcspi_bytes_per_word(int word_len) +{ + if (word_len <= 8) + return 1; + else if (word_len <= 16) + return 2; + else /* word_len <= 32 */ + return 4; +} + static void omap2_mcspi_set_dma_req(const struct spi_device *spi, int is_read, int enable) { @@ -432,10 +442,9 @@ omap2_mcspi_rx_dma(struct spi_device *spi, struct spi_transfer *xfer, else /* word_len <= 32 */ ((u32 *)xfer->rx_buf)[elements++] = w; } else { + int bytes_per_word = mcspi_bytes_per_word(word_len); dev_err(&spi->dev, "DMA RX penultimate word empty"); - count -= (word_len <= 8) ? 2 : - (word_len <= 16) ? 4 : - /* word_len <= 32 */ 8; + count -= (bytes_per_word << 1); omap2_mcspi_set_enable(spi, 1); return count; } @@ -453,9 +462,7 @@ omap2_mcspi_rx_dma(struct spi_device *spi, struct spi_transfer *xfer, ((u32 *)xfer->rx_buf)[elements] = w; } else { dev_err(&spi->dev, "DMA RX last word empty"); - count -= (word_len <= 8) ? 1 : - (word_len <= 16) ? 2 : - /* word_len <= 32 */ 4; + count -= mcspi_bytes_per_word(word_len); } omap2_mcspi_set_enable(spi, 1); return count; |