Why eeprom driver is read-only ?

[ranshalit@gmail.com (Ranran)]

On Mon, Nov 19, 2018 at 3:13 PM Ruben Safir <ruben@mrbrklyn.com> wrote:
>
> On 11/19/18 7:08 AM, Ranran wrote:
> > Hello,
> >
> > What is the reason that kernel driver of eeprom is configured only as
> > read-only ?
> >
> > Is it because the BIOS is stored there ?
> >
> > Is there a way to make it writable ?
> >
> > Thank you,
> > Ran
> >
> > _______________________________________________
> > Kernelnewbies mailing list
> > Kernelnewbies at kernelnewbies.org
> > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
> >
>
>
> because the ROM is read only?
>

That's interesting...
I think the name is confusing, because this chips are also writable.

Not only this, but in arm the eeprom (at24) is writable!
But in the x86 I am using, it is readonly in kernel code:
https://android.googlesource.com/kernel/omap/+/glass-omap-xrr02/drivers/misc/eeprom/eeprom.c
static struct bin_attribute eeprom_attr = {
.attr = {
.name = "eeprom",
.mode = S_IRUGO,
},
.size = EEPROM_SIZE,
.read = eeprom_read,
};

Regards,
ran



>
> --
> So many immigrant groups have swept through our town
> that Brooklyn, like Atlantis, reaches mythological
> proportions in the mind of the world - RI Safir 1998
> http://www.mrbrklyn.com
> DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002
>
> http://www.nylxs.com - Leadership Development in Free Software
> http://www.brooklyn-living.com
>
> Being so tracked is for FARM ANIMALS and and extermination camps,
> but incompatible with living as a free human being. -RI Safir 2013
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies