diff options
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/spi/sst.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/drivers/spi/sst.c b/src/drivers/spi/sst.c index 8245f726a7..ebeb441d1e 100644 --- a/src/drivers/spi/sst.c +++ b/src/drivers/spi/sst.c @@ -20,6 +20,7 @@ #define CMD_SST_WRDI 0x04 /* Write Disable */ #define CMD_SST_RDSR 0x05 /* Read Status Register */ #define CMD_SST_WRSR 0x01 /* Write Status Register */ +#define CMD_SST_EWSR 0x50 /* Enable Write Status Register */ #define CMD_SST_READ 0x03 /* Read Data Bytes */ #define CMD_SST_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */ #define CMD_SST_BP 0x02 /* Byte Program */ @@ -101,6 +102,15 @@ sst_enable_writing(struct spi_flash *flash) } static int +sst_enable_writing_status(struct spi_flash *flash) +{ + int ret = spi_flash_cmd(flash->spi, CMD_SST_EWSR, NULL, 0); + if (ret) + printk(BIOS_WARNING, "SF: Enabling Write Status failed\n"); + return ret; +} + +static int sst_disable_writing(struct spi_flash *flash) { int ret = spi_flash_cmd(flash->spi, CMD_SST_WRDI, NULL, 0); @@ -212,7 +222,7 @@ sst_unlock(struct spi_flash *flash) int ret; u8 cmd, status; - ret = sst_enable_writing(flash); + ret = sst_enable_writing_status(flash); if (ret) return ret; |