diff options
| author | Poddar, Sourav <sourav.poddar@ti.com> | 2013-10-07 15:53:01 +0530 |
|---|---|---|
| committer | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2013-10-07 17:55:51 +0530 |
| commit | 004f15b6000e220b74433b190e60805ce8776d92 (patch) | |
| tree | 33fdceed2d361fffdc0d9f8f7f0282b425c0d978 /include/spi.h | |
| parent | 62d206dc3126914f187cfb72e8a7c6cf84c19b7c (diff) | |
sf: Add memory mapped read support
Qspi controller can have a memory mapped port which can be used for
data read. Added support to enable memory mapped port read.
This patch enables the following:
- It enables exchange of memory map address between mtd and qspi
through the introduction of "memory_map" flag.
- Add support to communicate to the driver that memory mapped
transfer is to be started through introduction of new flags like
"SPI_XFER_MEM_MAP" and "SPI_XFER_MEM_MAP_END".
This will enable the spi controller to do memory mapped configurations
if required.
Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Diffstat (limited to 'include/spi.h')
| -rw-r--r-- | include/spi.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/spi.h b/include/spi.h index c44ebe88740..c2086fc62e7 100644 --- a/include/spi.h +++ b/include/spi.h @@ -27,6 +27,8 @@ /* SPI transfer flags */ #define SPI_XFER_BEGIN 0x01 /* Assert CS before transfer */ #define SPI_XFER_END 0x02 /* Deassert CS after transfer */ +#define SPI_XFER_MMAP 0x08 /* Memory Mapped start */ +#define SPI_XFER_MMAP_END 0x10 /* Memory Mapped End */ /* Header byte that marks the start of the message */ #define SPI_PREAMBLE_END_BYTE 0xec @@ -46,6 +48,7 @@ struct spi_slave { unsigned int bus; unsigned int cs; unsigned int max_write_size; + void *memory_map; }; /** |