diff options
Diffstat (limited to 'drivers/mtd/spi-nor/spi-nor.c')
| -rw-r--r-- | drivers/mtd/spi-nor/spi-nor.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c index 680bc1510475..6fcd9d7589f8 100644 --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -540,6 +540,9 @@ static int stm_lock(struct spi_nor *nor, loff_t ofs, uint64_t len) status_new = (status_old & ~mask) | val; + /* Disallow further writes if WP pin is asserted */ + status_new |= SR_SRWD; + /* Don't bother if they're the same */ if (status_new == status_old) return 0; @@ -605,6 +608,10 @@ static int stm_unlock(struct spi_nor *nor, loff_t ofs, uint64_t len) status_new = (status_old & ~mask) | val; + /* Don't protect status register if we're fully unlocked */ + if (lock_len == mtd->size) + status_new &= ~SR_SRWD; + /* Don't bother if they're the same */ if (status_new == status_old) return 0; |