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xilinx_spi: add support for the DS570 IP.

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This patch adds in support for the DS570 IP.

It's register compatible with the DS464, but adds support for 8/16/32 SPI.

The 8/16/32 support is added by attaching callbacks reading/writing the
proper amount of data. To indicate to the driver which amount of bits
to use a new field is introduced in the platform data struct.

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>
This commit is contained in:
Richard Röjfors 2009-11-13 12:28:55 +01:00 • committed by Grant Likely
parent 86fc593599
commit c9da2e1255
4 changed files with 95 additions and 34 deletions
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6
include/linux/spi/xilinx_spi.h
View file

@ -3,14 +3,16 @@
/**
* 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
* @num_chipselect: Number of chip select by the IP.
* @little_endian: If registers should be accessed little endian or not.
* @bits_per_word: Number of bits per word.
* @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;
u8 bits_per_word;
struct spi_board_info *devices;
u8 num_devices;
};