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spi: dw: Fix Designware SPI loopback 

[ Upstream commit 1403cfa69d ]

The SPI_LOOP is set in spi->mode but not propagated to the register.
A previous patch removed the bit during a cleanup.

Fixes: e1bc204894 ("spi: dw: fix potential variable assignment error")
Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
Link: https://lore.kernel.org/r/1572985330-5525-1-git-send-email-thor.thayer@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Thor Thayer 2019-11-05 14:22:10 -06:00 committed by Greg Kroah-Hartman
parent 12d8deb521
commit 6431e1fb7b
1 changed files with 2 additions and 1 deletions
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3
drivers/spi/spi-dw.c
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@ -308,7 +308,8 @@ static int dw_spi_transfer_one(struct spi_controller *master,
cr0 = (transfer->bits_per_word - 1)
| (chip->type << SPI_FRF_OFFSET)
| ((((spi->mode & SPI_CPOL) ? 1 : 0) << SPI_SCOL_OFFSET) |
(((spi->mode & SPI_CPHA) ? 1 : 0) << SPI_SCPH_OFFSET))
(((spi->mode & SPI_CPHA) ? 1 : 0) << SPI_SCPH_OFFSET) |
(((spi->mode & SPI_LOOP) ? 1 : 0) << SPI_SRL_OFFSET))
| (chip->tmode << SPI_TMOD_OFFSET);
/*