RE: [PATCH v2] arc: dts: use 'atmel' as manufacturer for at24 in axs10x_mb

[Alexey Brodkin]

Hi Bartosz,

> -----Original Message-----
> From: Bartosz Golaszewski [mailto:brgl@xxxxxxxx]
> Sent: Tuesday, February 6, 2018 7:02 PM
> To: Alexey Brodkin <Alexey.Brodkin@xxxxxxxxxxxx>
> Cc: linux-kernel@xxxxxxxxxxxxxxx; mark.rutland@xxxxxxx; Vineet.Gupta1@xxxxxxxxxxxx; robh+dt@xxxxxxxxxx;
> devicetree@xxxxxxxxxxxxxxx; linux-snps-arc@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [PATCH v2] arc: dts: use 'atmel' as manufacturer for at24 in axs10x_mb
> 
> 2018-02-06 13:25 GMT+01:00 Alexey Brodkin <Alexey.Brodkin@xxxxxxxxxxxx>:
> > Hi Bartosz,
> >
> > On Tue, 2018-02-06 at 12:08 +0100, Bartosz Golaszewski wrote:
> >> Using compatible strings without the <manufacturer> part for at24 is
> >> deprecated since commit 6da28acf745f ("dt-bindings: at24: consistently
> >> document the compatible property"). Use a correct 'atmel,<model>'
> >> value.
> >>
> >> Signed-off-by: Bartosz Golaszewski <brgl@xxxxxxxx>
> >
> > So my further input might be a bit unexpected :)
> >
> > I took a look at the real board and understood that we specified in .dts
> > wrong ICs. Those Atmel parts are not connected to the CPU at all (used by some
> > external device) and instead I2C EEPROM we really have connected (but not yet
> > obviously used in the Linux kernel) is NXP's PCF8594C-2.
> >
> > That said we may accept your change because it doesn't break anything
> > and then I'll send an update to axs10x_mb.dts with replacement of EEPROM nodes.
> > Or we may drop your change at all since I'm going to replace corresponding nodes.
> >
> > -Alexey
> 
> Looks like PCF8594C-2 is compatible with atmel,24c04 - when you'll be
> submitting this patch, please extend the at24 DT bindings with a new
> naming exception (just like the one for renesas).

Thanks for checking this.

> Feel free to drop this patch if you plan to submit the fix soon -
> otherwise, apply it if it may take some time.

No I think it worth applying especially in the light of your comment about NXP EEPROM.

Vineet, could you please take this one?

-Alexey