diff options
author | Angelo Dureghello <angelo@sysam.it> | 2018-12-26 22:45:06 +0100 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-22 09:32:02 +0200 |
commit | 12b633327598a027374a620e17804e8060fb91d4 (patch) | |
tree | b99558545b85c9e59054f43c91e325fbdd99567c /drivers/spi | |
parent | 1e6734e7675fa9ef17b95894eff2c2e9bec79a61 (diff) |
spi: fix initial SPI_SR value in spi-fsl-dspi
[ Upstream commit aa54c1c9d90e6db75190813907190fadcce1bf45 ]
On ColdFire mcf54418, using DSPI_DMA_MODE mode, spi transfers
at first boot stage are not succeding:
m25p80 spi0.1: unrecognized JEDEC id bytes: 00, 00, 00
The reason is the SPI_SR initial value set by the driver, that
is not clearing (not setting to 1) the RF_DF flag. After a tour
on the dspi hw modules that use this driver(Vybrid, ColdFire and
ls1021a) a better init value for SR register has been set.
Signed-off-by: Angelo Dureghello <angelo@sysam.it>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r-- | drivers/spi/spi-fsl-dspi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index 2844c9a72a98..1144d022cc58 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -71,7 +71,7 @@ #define SPI_SR 0x2c #define SPI_SR_EOQF 0x10000000 #define SPI_SR_TCFQF 0x80000000 -#define SPI_SR_CLEAR 0xdaad0000 +#define SPI_SR_CLEAR 0x9aaf0000 #define SPI_RSER_TFFFE BIT(25) #define SPI_RSER_TFFFD BIT(24) |