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authorSerge Semin <Sergey.Semin@baikalelectronics.ru>2020-09-20 14:28:53 +0300
committerMark Brown <broonie@kernel.org>2020-09-29 19:22:26 +0300
commitcc760f3143f53ea8387cd76cffc43bdc89db9df4 (patch)
tree21eadda04ccd221f910953968439d31ac0acc3a0 /drivers/spi/spi-dw-core.c
parent675e7c9d71cedee3988b554c47971be77e72d2db (diff)
downloadlinux-cc760f3143f53ea8387cd76cffc43bdc89db9df4.tar.xz
spi: dw: Convert CS-override to DW SPI capabilities
There are several vendor-specific versions of the DW SPI controllers, each of which may have some peculiarities with respect to the original IP-core. Seeing it has already caused adding flags and a callback into the DW SPI private data, let's introduce a generic capabilities interface to tune the generic DW SPI controller driver up in accordance with the particular controller specifics. It's done by converting a simple Alpine-specific CS-override capability into the DW SPI controller capability activated by setting the DW_SPI_CAP_CS_OVERRIDE flag. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Link: https://lore.kernel.org/r/20200920112914.26501-10-Sergey.Semin@baikalelectronics.ru Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-dw-core.c')
-rw-r--r--drivers/spi/spi-dw-core.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/spi/spi-dw-core.c b/drivers/spi/spi-dw-core.c
index cbb65d3ea13e..f01a43b1954c 100644
--- a/drivers/spi/spi-dw-core.c
+++ b/drivers/spi/spi-dw-core.c
@@ -104,7 +104,7 @@ void dw_spi_set_cs(struct spi_device *spi, bool enable)
*/
if (cs_high == enable)
dw_writel(dws, DW_SPI_SER, BIT(spi->chip_select));
- else if (dws->cs_override)
+ else if (dws->caps & DW_SPI_CAP_CS_OVERRIDE)
dw_writel(dws, DW_SPI_SER, 0);
}
EXPORT_SYMBOL_GPL(dw_spi_set_cs);
@@ -444,7 +444,7 @@ static void spi_hw_init(struct device *dev, struct dw_spi *dws)
}
/* enable HW fixup for explicit CS deselect for Amazon's alpine chip */
- if (dws->cs_override)
+ if (dws->caps & DW_SPI_CAP_CS_OVERRIDE)
dw_writel(dws, DW_SPI_CS_OVERRIDE, 0xF);
}