Hi Marek, On 2015年11月04日 11:45, Marek Vasut wrote: > Let me just put an idea here, it might be wrong -- but doesn't this seem > like some sort of NVMEM device? See for example: > > https://lkml.org/lkml/2015/5/21/643 Thanks for the pointer. However, it needs erasing before writing. Regards, Thomas