diff options
| author | Angelo Dureghello <angelo.dureghello@timesys.com> | 2020-05-29 22:57:56 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-05-30 01:43:15 +0300 |
| commit | 263b81dc6c932c8bc550d5e7bfc178d2b3fc491e (patch) | |
| tree | 48b3f41e2182984b3d18000286b020d1732c142c /drivers/spi/spi-fsl-dspi.c | |
| parent | 164c05f03ffabe36564cb8959c1fad7c56f294dd (diff) | |
| download | linux-263b81dc6c932c8bc550d5e7bfc178d2b3fc491e.tar.xz | |
spi: spi-fsl-dspi: fix native data copy
ColdFire is a big-endian cpu with a big-endian dspi hw module,
so, it uses native access, but memcpy breaks the endianness.
So, if i understand properly, by native copy we would mean
be(cpu)->be(dspi) or le(cpu)->le(dspi) accesses, so my fix
shouldn't break anything, but i couldn't test it on LS family,
so every test is really appreciated.
Fixes: 53fadb4d90c7 ("spi: spi-fsl-dspi: Simplify bytes_per_word gymnastics")
Signed-off-by: Angelo Dureghello <angelo.dureghello@timesys.com>
Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20200529195756.184677-1-angelo.dureghello@timesys.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-fsl-dspi.c')
| -rw-r--r-- | drivers/spi/spi-fsl-dspi.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index 685afdf9e807..a35faced0456 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -250,13 +250,33 @@ struct fsl_dspi { static void dspi_native_host_to_dev(struct fsl_dspi *dspi, u32 *txdata) { - memcpy(txdata, dspi->tx, dspi->oper_word_size); + switch (dspi->oper_word_size) { + case 1: + *txdata = *(u8 *)dspi->tx; + break; + case 2: + *txdata = *(u16 *)dspi->tx; + break; + case 4: + *txdata = *(u32 *)dspi->tx; + break; + } dspi->tx += dspi->oper_word_size; } static void dspi_native_dev_to_host(struct fsl_dspi *dspi, u32 rxdata) { - memcpy(dspi->rx, &rxdata, dspi->oper_word_size); + switch (dspi->oper_word_size) { + case 1: + *(u8 *)dspi->rx = rxdata; + break; + case 2: + *(u16 *)dspi->rx = rxdata; + break; + case 4: + *(u32 *)dspi->rx = rxdata; + break; + } dspi->rx += dspi->oper_word_size; } |