Hi, On Wed, Aug 30, 2023 at 2:58 AM Luca Weiss <luca.weiss@xxxxxxxxxxxxx> wrote: > > On some platforms like sc7280 on non-ChromeOS devices the core clock > cannot be touched by Linux so we cannot provide it. Mark it as optional > as accessing qfprom works without it. > > Signed-off-by: Luca Weiss <luca.weiss@xxxxxxxxxxxxx> > --- > drivers/nvmem/qfprom.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) Are you actually testing burning fuses from the OS, or are you just using the nvmem in "read-only" mode? From comments in the bindings, if you're trying to burn the fuses then the clock is required. If things are in read-only mode then the clock isn't required. When I compare to the driver, it seems like the driver assumes that if more than one memory region is provided then you must be supporting burning fuses. The bindings agree that having 4 memory regions specified means that the nvmem supports burning and 1 memory region specified means read-only. The extra 3 memory regions in the nvmem are all about fuse burning, I believe. So maybe the right fix here is to just change your dts to specify one memory region? -Doug
