SPI core validates both bits_per_word and speed_hz transfer parameters and defaults to spi->bits_per_word and spi->max_speed_hz in case these per transfer parameters are not set. This allows to remove related if statements as they evaluate always to true and reduce indentation.
Signed-off-by: Jarkko Nikula <[email protected]> --- drivers/spi/spi-dw.c | 41 ++++++++++++++++++----------------------- 1 file changed, 18 insertions(+), 23 deletions(-) diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c index 4fbfcdc5cb24..2b5d736465c9 100644 --- a/drivers/spi/spi-dw.c +++ b/drivers/spi/spi-dw.c @@ -309,34 +309,29 @@ static int dw_spi_transfer_one(struct spi_master *master, cr0 = chip->cr0; /* Handle per transfer options for bpw and speed */ - if (transfer->speed_hz) { - speed = chip->speed_hz; + speed = chip->speed_hz; + if ((transfer->speed_hz != speed) || !chip->clk_div) { + speed = transfer->speed_hz; - if ((transfer->speed_hz != speed) || !chip->clk_div) { - speed = transfer->speed_hz; + /* clk_div doesn't support odd number */ + clk_div = (dws->max_freq / speed + 1) & 0xfffe; - /* clk_div doesn't support odd number */ - clk_div = (dws->max_freq / speed + 1) & 0xfffe; + chip->speed_hz = speed; + chip->clk_div = clk_div; - chip->speed_hz = speed; - chip->clk_div = clk_div; - - spi_set_clk(dws, chip->clk_div); - } + spi_set_clk(dws, chip->clk_div); } - if (transfer->bits_per_word) { - if (transfer->bits_per_word == 8) { - dws->n_bytes = 1; - dws->dma_width = 1; - } else if (transfer->bits_per_word == 16) { - dws->n_bytes = 2; - dws->dma_width = 2; - } - cr0 = (transfer->bits_per_word - 1) - | (chip->type << SPI_FRF_OFFSET) - | (spi->mode << SPI_MODE_OFFSET) - | (chip->tmode << SPI_TMOD_OFFSET); + if (transfer->bits_per_word == 8) { + dws->n_bytes = 1; + dws->dma_width = 1; + } else if (transfer->bits_per_word == 16) { + dws->n_bytes = 2; + dws->dma_width = 2; } + cr0 = (transfer->bits_per_word - 1) + | (chip->type << SPI_FRF_OFFSET) + | (spi->mode << SPI_MODE_OFFSET) + | (chip->tmode << SPI_TMOD_OFFSET); /* * Adjust transfer mode if necessary. Requires platform dependent -- 2.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
