From 004f15b6000e220b74433b190e60805ce8776d92 Mon Sep 17 00:00:00 2001 From: "Poddar, Sourav" Date: Mon, 7 Oct 2013 15:53:01 +0530 Subject: 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 Reviewed-by: Jagannadha Sutradharudu Teki --- include/spi.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/spi.h') diff --git a/include/spi.h b/include/spi.h index c44ebe8874..c2086fc62e 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; }; /** -- cgit v1.2.1