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| author | Hieu Tran Dang <dangtranhieu2012@gmail.com> | 2018-10-02 13:06:36 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-10-10 13:41:36 +0200 |
| commit | de8978c388c66b8fca192213ec9f0727e964c652 (patch) | |
| tree | 83a54d57de9f958ce8f01024a1dfb693f4d42c00 /drivers/spi/spi-fsl-lpspi.c | |
| parent | spi: spi-ep93xx: Use dma_data_direction for ep93xx_spi_dma_{finish,prepare} (diff) | |
| download | linux-de8978c388c66b8fca192213ec9f0727e964c652.tar.xz linux-de8978c388c66b8fca192213ec9f0727e964c652.zip | |
spi: fsl-lpspi: Prevent FIFO under/overrun by default
Certain devices don't work well when a transmit FIFO underrun or
receive FIFO overrun occurs. Example is the SAF400x radio chip when
running at high speed which leads to garbage being sent to/received from
the chip. In which case, it should stall waiting for further data to be
available before proceeding. This patch unset the NOSTALL bit in CFGR1
by default to prevent this issue.
Signed-off-by: Hieu Tran Dang <dangtranhieu2012@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-fsl-lpspi.c')
| -rw-r--r-- | drivers/spi/spi-fsl-lpspi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index e6d5cc6ab108..51670976faa3 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -276,7 +276,7 @@ static int fsl_lpspi_config(struct fsl_lpspi_data *fsl_lpspi) fsl_lpspi_set_watermark(fsl_lpspi); - temp = CFGR1_PCSCFG | CFGR1_MASTER | CFGR1_NOSTALL; + temp = CFGR1_PCSCFG | CFGR1_MASTER; if (fsl_lpspi->config.mode & SPI_CS_HIGH) temp |= CFGR1_PCSPOL; writel(temp, fsl_lpspi->base + IMX7ULP_CFGR1); |