xilinx_spi: Switch to iomem functions and support little endian.
This patch changes the out_(be)(8|16|32) and in_(be)(8|16|32) calls to 32 bits ioread/iowrite.
The read and write function are attached to the internal struct as callbacks, callback
is selected depending on endianess.
This will also build on platforms not supporting the in/out calls for instance x86.
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: John Linn <John.Linn@xilinx.com>
Signed-off-by: Richard Röjfors <richard.rojfors@mocean-labs.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/include/linux/spi/xilinx_spi.h b/include/linux/spi/xilinx_spi.h
index 06df0ab..a705ad8 100644
--- a/include/linux/spi/xilinx_spi.h
+++ b/include/linux/spi/xilinx_spi.h
@@ -4,11 +4,13 @@
/**
* struct xspi_platform_data - Platform data of the Xilinx SPI driver
* @num_chipselect: Number of chip select by the IP
+ * @little_endian If registers should be accessed little endian or not
* @devices: Devices to add when the driver is probed.
* @num_devices: Number of devices in the devices array.
*/
struct xspi_platform_data {
u16 num_chipselect;
+ bool little_endian;
struct spi_board_info *devices;
u8 num_devices;
};