linux-kernel - Re: [RFC v3 5/5] cros_ec: differentiate SCP from EC by feature bit.

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Date:   Wed, 30 Jan 2019 16:06:08 +0100
From:   Enric Balletbo Serra <eballetbo@...il.com>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     Pi-Hsun Shih <pihsun@...omium.org>,
        Nicolas Boichat <drinkcat@...omium.org>,
        Guenter Roeck <groeck@...omium.org>,
        Benson Leung <bleung@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [RFC v3 5/5] cros_ec: differentiate SCP from EC by feature bit.

Hi Lee, Pi-Hsun,

Missatge de Lee Jones <lee.jones@...aro.org> del dia dc., 30 de gen.
2019 a les 14:07:
>
> On Mon, 21 Jan 2019, Pi-Hsun Shih wrote:
>
> > Since a SCP and EC would both exist on a system, and use the cros_ec_dev
> > driver, we need to differentiate between them for the userspace, or they
> > would both be registered at /dev/cros_ec, causing a conflict.
> >
> > Cc: Enric Balletbo Serra <eballetbo@...il.com>
> > Cc: Guenter Roeck <groeck@...omium.org>
> > Signed-off-by: Pi-Hsun Shih <pihsun@...omium.org>
> > ---
> > Changes from v2:
> >  - No change.
> >
> > Changes from v1:
> >  - New patch extracted from Patch 5.
> > ---
> >  drivers/mfd/cros_ec_dev.c            | 9 +++++++++
> >  include/linux/mfd/cros_ec.h          | 1 +
> >  include/linux/mfd/cros_ec_commands.h | 2 ++
> >  3 files changed, 12 insertions(+)
>
> Just to clarify to the new Cc'ed list, I'm waiting on one of the
> Chromium guys to review before I put my mucky paws over it.
>

Pi-Hsun, is this patchset still an RFC or you really want to see this
merged ASAP? If I am not mistaken there is still some work in progress
trying to push all the SCP stuff?

Lee, personally I have some concerns. Looks like the cros_* family is
increasing quickly lately (cros_ec, cros_pd, cros_scp, cros_ish,
cros_fp ...) and I am wondering if we are really doing well all this.
To be honest, I'd like to take a deeper look before merge this, btw I
thought there was no hurry because of the RFC and I guess there are
still some scp things that are missing. I might be wrong, and if
that's not the case I can take a look deeper and the end of the week.

Best regards,
 Enric


> --
> Lee Jones [李琼斯]
> Linaro Services Technical Lead
> Linaro.org │ Open source software for ARM SoCs
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