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sf: Add dual memories support - DUAL_PARALLEL

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This patch added support for accessing dual memories in
parallel connection with single chipselect line from controller.

For more info - see doc/SPI/README.dual-flash

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
This commit is contained in:
Jagannadha Sutradharudu Teki 2014-01-07 00:11:35 +05:30
parent f77f469117
commit 056fbc73d5
5 changed files with 45 additions and 9 deletions
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5
include/spi_flash.h
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@ -40,6 +40,7 @@ enum spi_read_cmds {
enum spi_dual_flash {
SF_SINGLE_FLASH = 0,
SF_DUAL_STACKED_FLASH = 1 << 0,
SF_DUAL_PARALLEL_FLASH = 1 << 1,
};
/**
@ -70,7 +71,8 @@ extern const struct spi_flash_params spi_flash_params_table[];
*
* @spi: SPI slave
* @name: Name of SPI flash
* @dual_flash: Indicates dual flash memories - dual stacked
* @dual_flash: Indicates dual flash memories - dual stacked, parallel
* @shift: Flash shift useful in dual parallel
* @size: Total flash size
* @page_size: Write (page) size
* @sector_size: Sector size
@ -96,6 +98,7 @@ struct spi_flash {
struct spi_slave *spi;
const char *name;
u8 dual_flash;
u8 shift;
u32 size;
u32 page_size;