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authorRasmus Villemoes <rasmus.villemoes@prevas.dk>2021-01-30 17:35:45 +0300
committerMark Brown <broonie@kernel.org>2021-02-01 16:19:00 +0300
commit9d2aa6dbf87af89c13cac2d1b4cccad83fb14a7e (patch)
treefb1021d3eb0913e050cb28a311c380f7cd972482 /drivers/spi
parent396cf2a46adddbf51373e16225c1d25254310046 (diff)
downloadlinux-9d2aa6dbf87af89c13cac2d1b4cccad83fb14a7e.tar.xz
spi: fsl: invert spisel_boot signal on MPC8309
Commit 7a2da5d7960a ("spi: fsl: Fix driver breakage when SPI_CS_HIGH is not set in spi->mode") broke our MPC8309 board by effectively inverting the boolean value passed to fsl_spi_cs_control. The SPISEL_BOOT signal is used as chipselect, but it's not a gpio, so we cannot rely on gpiolib handling the polarity. Adapt to the new world order by inverting the logic here. This does assume that the slave sitting at the SPISEL_BOOT is active low, but should that ever turn out not to be the case, one can create a stub gpiochip driver controlling a single gpio (or rather, a single "spo", special-purpose output). Fixes: 7a2da5d7960a ("spi: fsl: Fix driver breakage when SPI_CS_HIGH is not set in spi->mode") Cc: stable@vger.kernel.org Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk> Link: https://lore.kernel.org/r/20210130143545.505613-1-rasmus.villemoes@prevas.dk Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-fsl-spi.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c
index 6d8e0a05a535..e4a8d203f940 100644
--- a/drivers/spi/spi-fsl-spi.c
+++ b/drivers/spi/spi-fsl-spi.c
@@ -695,7 +695,7 @@ static void fsl_spi_cs_control(struct spi_device *spi, bool on)
if (WARN_ON_ONCE(!pinfo->immr_spi_cs))
return;
- iowrite32be(on ? SPI_BOOT_SEL_BIT : 0, pinfo->immr_spi_cs);
+ iowrite32be(on ? 0 : SPI_BOOT_SEL_BIT, pinfo->immr_spi_cs);
}
}