diff options
Diffstat (limited to 'drivers/mtd/spi/sf_ops.c')
| -rw-r--r-- | drivers/mtd/spi/sf_ops.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c index 39e06ecae0..827f71912d 100644 --- a/drivers/mtd/spi/sf_ops.c +++ b/drivers/mtd/spi/sf_ops.c @@ -38,6 +38,7 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr) return 0; } +#if defined(CONFIG_SPI_FLASH_SPANSION) || defined(CONFIG_SPI_FLASH_WINBOND) static int spi_flash_cmd_write_config(struct spi_flash *flash, u8 cr) { u8 data[2]; @@ -62,6 +63,31 @@ static int spi_flash_cmd_write_config(struct spi_flash *flash, u8 cr) return 0; } +int spi_flash_set_qeb_winspan(struct spi_flash *flash) +{ + u8 qeb_status; + u8 cmd; + int ret; + + cmd = CMD_READ_CONFIG; + ret = spi_flash_read_common(flash, &cmd, 1, &qeb_status, 1); + if (ret < 0) { + debug("SF: fail to read config register\n"); + return ret; + } + + if (qeb_status & STATUS_QEB_WINSPAN) { + debug("SF: Quad enable bit is already set\n"); + } else { + ret = spi_flash_cmd_write_config(flash, STATUS_QEB_WINSPAN); + if (ret < 0) + return ret; + } + + return ret; +} +#endif + #ifdef CONFIG_SPI_FLASH_BAR static int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel) { |