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 17:22:26 +0100 |
| commit | cc760f3143f53ea8387cd76cffc43bdc89db9df4 (patch) | |
| tree | 21eadda04ccd221f910953968439d31ac0acc3a0 /drivers/spi/spi-dw.h | |
| parent | 675e7c9d71cedee3988b554c47971be77e72d2db (diff) | |
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.h')
| -rw-r--r-- | drivers/spi/spi-dw.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h index 66ef35dd8b6e..b11fc873c3a7 100644 --- a/drivers/spi/spi-dw.h +++ b/drivers/spi/spi-dw.h @@ -2,6 +2,7 @@ #ifndef DW_SPI_HEADER_H #define DW_SPI_HEADER_H +#include <linux/bits.h> #include <linux/completion.h> #include <linux/debugfs.h> #include <linux/irqreturn.h> @@ -98,6 +99,9 @@ enum dw_ssi_type { SSI_NS_MICROWIRE, }; +/* DW SPI capabilities */ +#define DW_SPI_CAP_CS_OVERRIDE BIT(0) + struct dw_spi; struct dw_spi_dma_ops { int (*dma_init)(struct device *dev, struct dw_spi *dws); @@ -118,7 +122,8 @@ struct dw_spi { u32 fifo_len; /* depth of the FIFO buffer */ u32 max_freq; /* max bus freq supported */ - int cs_override; + u32 caps; /* DW SPI capabilities */ + u32 reg_io_width; /* DR I/O width in bytes */ u16 bus_num; u16 num_cs; /* supported slave numbers */ |