diff options
| author | Mark Brown <broonie@linaro.org> | 2013-10-25 09:51:19 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-10-25 09:51:19 +0100 |
| commit | 5b66fd1812513226d0740b4f84462bae99a8f85d (patch) | |
| tree | ae71cba352604a478d8f69f365d11f9ec8251f48 /drivers/spi | |
| parent | 9270d827de92ba638048ff6fad2ba9c01a492ba8 (diff) | |
| parent | 5db542ed85b5e88346675f672dbd2eefa52005f4 (diff) | |
Merge remote-tracking branch 'spi/fix/mcspi' into spi-linus
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-omap2-mcspi.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index ed4af4708d9a..32dca0c55358 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -276,7 +276,7 @@ static void omap2_mcspi_set_fifo(const struct spi_device *spi, struct omap2_mcspi_cs *cs = spi->controller_state; struct omap2_mcspi *mcspi; unsigned int wcnt; - int fifo_depth, bytes_per_word; + int max_fifo_depth, fifo_depth, bytes_per_word; u32 chconf, xferlevel; mcspi = spi_master_get_devdata(master); @@ -287,7 +287,12 @@ static void omap2_mcspi_set_fifo(const struct spi_device *spi, if (t->len % bytes_per_word != 0) goto disable_fifo; - fifo_depth = gcd(t->len, OMAP2_MCSPI_MAX_FIFODEPTH); + if (t->rx_buf != NULL && t->tx_buf != NULL) + max_fifo_depth = OMAP2_MCSPI_MAX_FIFODEPTH / 2; + else + max_fifo_depth = OMAP2_MCSPI_MAX_FIFODEPTH; + + fifo_depth = gcd(t->len, max_fifo_depth); if (fifo_depth < 2 || fifo_depth % bytes_per_word != 0) goto disable_fifo; @@ -299,7 +304,8 @@ static void omap2_mcspi_set_fifo(const struct spi_device *spi, if (t->rx_buf != NULL) { chconf |= OMAP2_MCSPI_CHCONF_FFER; xferlevel |= (fifo_depth - 1) << 8; - } else { + } + if (t->tx_buf != NULL) { chconf |= OMAP2_MCSPI_CHCONF_FFET; xferlevel |= fifo_depth - 1; } |