On 9 February 2015 at 04:57, Michael Walle <mich...@walle.cc> wrote: > Hi there, > > I stumbled across a situation where the SPI flash on my board was write > protected and i could not unlock it in the bootloader. This is especially > unfortunate because the recovery mechanism relies on the bootloader to be > able to erase the environment.
Which flash vendor it is? seems like there is a hardware write protected mechanism in ST MICRON flashes. Please refer that, may be this looks similar to that W#/Vpp CONFIG_SYS_SPI_ST_ENABLE_WP_PIN > > So any ideas how to fix this? I didn't see any code which unlocks the > sectors yet. > > We could add a lock/unlock function to the spi system, then call unlock in > the beginning of saveenv() and lock at the end of saveenv(). Eg. > > lockbits = read_status() & LOCK_BITS > spi_unlock_all() > saveenv() > spi_lock(lockbits) > > Also this should be exposed to the CLI somehow. "sf lock/unlock"? thanks! -- Jagan. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot