From 56cd5c1578135120d73a7054140855728f8cca36 Mon Sep 17 00:00:00 2001 From: Illia Smyrnov Date: Fri, 14 Jun 2013 19:12:07 +0300 Subject: 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 Signed-off-by: Mark Brown --- drivers/spi/spi-omap2-mcspi.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) (limited to 'drivers/spi/spi-omap2-mcspi.c') diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index 000922abcb87..5a93a0df551f 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; -- cgit v1.2.3