diff options
| -rw-r--r-- | drivers/mtd/devices/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/mtd/devices/mtd_dataflash.c | 8 |
2 files changed, 13 insertions, 5 deletions
diff --git a/drivers/mtd/devices/Kconfig b/drivers/mtd/devices/Kconfig index 88f4df04746..6fde0a2e356 100644 --- a/drivers/mtd/devices/Kconfig +++ b/drivers/mtd/devices/Kconfig @@ -59,6 +59,16 @@ config MTD_DATAFLASH Sometimes DataFlash chips are packaged inside MMC-format cards; at this writing, the MMC stack won't handle those. +config MTD_DATAFLASH_WRITE_VERIFY + bool "Verify DataFlash page writes" + depends on MTD_DATAFLASH + help + This adds an extra check when data is written to the flash. + It may help if you are verifying chip setup (timings etc) on + your board. There is a rare possibility that even though the + device thinks the write was successful, a bit could have been + flipped accidentally due to device wear or something else. + config MTD_DATAFLASH_OTP bool "DataFlash OTP support (Security Register)" depends on MTD_DATAFLASH diff --git a/drivers/mtd/devices/mtd_dataflash.c b/drivers/mtd/devices/mtd_dataflash.c index 90161277902..6dd9aff8bb2 100644 --- a/drivers/mtd/devices/mtd_dataflash.c +++ b/drivers/mtd/devices/mtd_dataflash.c @@ -30,12 +30,10 @@ * doesn't (yet) use these for any kind of i/o overlap or prefetching. * * Sometimes DataFlash is packaged in MMC-format cards, although the - * MMC stack can't use SPI (yet), or distinguish between MMC and DataFlash + * MMC stack can't (yet?) distinguish between MMC and DataFlash * protocols during enumeration. */ -#define CONFIG_DATAFLASH_WRITE_VERIFY - /* reads can bypass the buffers */ #define OP_READ_CONTINUOUS 0xE8 #define OP_READ_PAGE 0xD2 @@ -403,7 +401,7 @@ static int dataflash_write(struct mtd_info *mtd, loff_t to, size_t len, (void) dataflash_waitready(priv->spi); -#ifdef CONFIG_DATAFLASH_WRITE_VERIFY +#ifdef CONFIG_MTD_DATAFLASH_VERIFY_WRITE /* (3) Compare to Buffer1 */ addr = pageaddr << priv->page_offset; @@ -432,7 +430,7 @@ static int dataflash_write(struct mtd_info *mtd, loff_t to, size_t len, } else status = 0; -#endif /* CONFIG_DATAFLASH_WRITE_VERIFY */ +#endif /* CONFIG_MTD_DATAFLASH_VERIFY_WRITE */ remaining = remaining - writelen; pageaddr++; |