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| author | Robin Gong <yibin.gong@nxp.com> | 2018-10-10 10:32:48 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-10-12 18:54:02 +0200 |
| commit | 133eb8e38b02c6c63a039523fca12737009a6686 (patch) | |
| tree | efda200882eb8119236ddad94f2193316222f7e4 /drivers/spi | |
| parent | 5ba5a3730639caddf42af11c60f3f3d99d9a5f00 (diff) | |
| download | linux-133eb8e38b02c6c63a039523fca12737009a6686.tar.gz linux-133eb8e38b02c6c63a039523fca12737009a6686.tar.bz2 linux-133eb8e38b02c6c63a039523fca12737009a6686.zip | |
spi: imx: use PIO mode if size is small
Use PIO mode instead if size is smaller than fifo size, since
dma may be less efficient.
Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-imx.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 037abbb852a4..dd1ce12aa386 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -224,6 +224,9 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi, if (spi_imx->slave_mode) return false; + if (transfer->len < spi_imx->devtype_data->fifo_size) + return false; + spi_imx->dynamic_burst = 0; return true; |