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| author | Axel Lin <axel.lin@ingics.com> | 2014-03-02 22:48:41 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-03-04 11:19:14 +0800 |
| commit | af348519e4a41eac8eae82cf3dcaeb6c1b008113 (patch) | |
| tree | 6504aa74755a5791a596676c5bb0caec01c7fb46 /drivers/spi/spi-xcomm.c | |
| parent | 38dbfb59d1175ef458d006556061adeaa8751b72 (diff) | |
| download | lwn-af348519e4a41eac8eae82cf3dcaeb6c1b008113.tar.gz lwn-af348519e4a41eac8eae82cf3dcaeb6c1b008113.zip | |
spi: xcomm: Remove duplicate code to set default bits_per_word and max speed
In the implementation of __spi_validate(), spi core will set transfer
bits_per_word and max speed as spi device default if it is not set for
this transfer. So we can remove the same logic in spi_xcomm_setup_transfer().
Also remove a redundant code to initialize is_first variable.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi/spi-xcomm.c')
| -rw-r--r-- | drivers/spi/spi-xcomm.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/drivers/spi/spi-xcomm.c b/drivers/spi/spi-xcomm.c index 24c40b13dab1..2505b7e1232a 100644 --- a/drivers/spi/spi-xcomm.c +++ b/drivers/spi/spi-xcomm.c @@ -74,15 +74,13 @@ static void spi_xcomm_chipselect(struct spi_xcomm *spi_xcomm, static int spi_xcomm_setup_transfer(struct spi_xcomm *spi_xcomm, struct spi_device *spi, struct spi_transfer *t, unsigned int *settings) { - unsigned int speed; - if (t->len > 62) return -EINVAL; - speed = t->speed_hz ? t->speed_hz : spi->max_speed_hz; + if (t->speed_hz != spi_xcomm->current_speed) { + unsigned int divider; - if (speed != spi_xcomm->current_speed) { - unsigned int divider = DIV_ROUND_UP(SPI_XCOMM_CLOCK, speed); + divider = DIV_ROUND_UP(SPI_XCOMM_CLOCK, t->speed_hz); if (divider >= 64) *settings |= SPI_XCOMM_SETTINGS_CLOCK_DIV_64; else if (divider >= 16) @@ -90,7 +88,7 @@ static int spi_xcomm_setup_transfer(struct spi_xcomm *spi_xcomm, else *settings |= SPI_XCOMM_SETTINGS_CLOCK_DIV_4; - spi_xcomm->current_speed = speed; + spi_xcomm->current_speed = t->speed_hz; } if (spi->mode & SPI_CPOL) @@ -148,8 +146,6 @@ static int spi_xcomm_transfer_one(struct spi_master *master, int status = 0; bool is_last; - is_first = true; - spi_xcomm_chipselect(spi_xcomm, spi, true); list_for_each_entry(t, &msg->transfers, transfer_list) { |