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sf: Add flag status register polling support

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Flag status register polling is required for micron 512Mb flash
devices onwards, for performing erase/program operations.

Like polling for WIP(Write-In-Progress) bit in read status register,
spi_flash_cmd_wait_ready will poll for PEC(Program-Erase-Control)
bit in flag status register.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Jagannadha Sutradharudu Teki
2013-06-21 15:56:30 +05:30
parent ba549de6c5
commit 615a156167
4 changed files with 21 additions and 4 deletions
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3
include/spi_flash.h
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@@ -46,6 +46,9 @@ struct spi_flash {
/* Current flash bank */
u8 bank_curr;
#endif
/* Poll cmd - for flash erase/program */
u8 poll_cmd;
void *memory_map; /* Address of read-only SPI flash access */
int (*read)(struct spi_flash *flash, u32 offset,
size_t len, void *buf);