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sf: unify write disable commands 

Every spi flash uses the same write disable command, so unify this in
the common code.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Fixed commit message.
Signed-off-by: Wolfgang Denk <wd@denx.de>
This commit is contained in:
Mike Frysinger 2011-04-25 06:59:53 +00:00 committed by Wolfgang Denk
parent fba2c44e46
commit 66ecb7cdb0
2 changed files with 10 additions and 1 deletions
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9
drivers/mtd/spi/spi_flash_internal.h
View File

@ -20,6 +20,7 @@
#define CMD_READ_ARRAY_LEGACY 0xe8
#define CMD_PAGE_PROGRAM 0x02
#define CMD_WRITE_DISABLE 0x04
#define CMD_READ_STATUS 0x05
#define CMD_WRITE_ENABLE 0x06
@ -61,6 +62,14 @@ static inline int spi_flash_cmd_write_enable(struct spi_flash *flash)
return spi_flash_cmd(flash->spi, CMD_WRITE_ENABLE, NULL, 0);
}
/*
* Disable writing on the SPI flash.
*/
static inline int spi_flash_cmd_write_disable(struct spi_flash *flash)
{
return spi_flash_cmd(flash->spi, CMD_WRITE_DISABLE, NULL, 0);
}
/*
* Same as spi_flash_cmd_read() except it also claims/releases the SPI
* bus. Used as common part of the ->read() operation.

2
drivers/mtd/spi/sst.c
View File

@ -105,7 +105,7 @@ sst_enable_writing(struct spi_flash *flash)
static int
sst_disable_writing(struct spi_flash *flash)
{
int ret = spi_flash_cmd(flash->spi, CMD_SST_WRDI, NULL, 0);
int ret = spi_flash_cmd_write_disable(flash);
if (ret)
debug("SF: Disabling Write failed\n");
return ret;