diff options
| author | Serge Semin <Sergey.Semin@baikalelectronics.ru> | 2020-09-20 14:28:53 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-09-29 19:22:26 +0300 |
| commit | cc760f3143f53ea8387cd76cffc43bdc89db9df4 (patch) | |
| tree | 21eadda04ccd221f910953968439d31ac0acc3a0 /drivers/spi/spi-dw-core.c | |
| parent | 675e7c9d71cedee3988b554c47971be77e72d2db (diff) | |
| download | linux-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.c | 4 |
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); } |