[OpenWrt-Devel] Rebooting boards with > 16M SPI flash (was: Re: help)

Jonas Gorski jogo at openwrt.org
Thu Jul 9 05:18:31 EDT 2015

On Wed, Jul 8, 2015 at 2:00 PM, Paul Fertser <fercerpav at gmail.com> wrote:
> Hi,
> ldy647 <ldy647 at 163.com> writes:
>> recently, when we install our wireless router, we found when we run
>> the reboot command, the board couldn't restart. We hope you could lend
>> us a hand to solve this problem. We'll be quite grateful for what you
>> do for us.
> Apparently MT7620 can't handle 4 byte addressing mode of the flash
> memory on hardware (probably ROM bootloader) level so it needs to be
> reset somehow prior to resetting the SoC. Some SoCs have a special
> output from the watchdog to reset all the on-board peripherals, it
> should be connected to the !RESET pin of the flash as well. And the
> kernel should then use the watchdog driver to cause a reboot.

According to the datasheet you can set the default to 4addr through
boostrapping pins. This should fix your particular issue.

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