linux-kernel - Re: [PATCH 2/2] remarkable2_defconfig: Add initial support for the reMarkable2

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Date:   Sun, 17 Jan 2021 17:36:33 -0800
From:   Alistair Francis <alistair23@...il.com>
To:     Olof Johansson <olof@...om.net>
Cc:     Alistair Francis <alistair@...stair23.me>,
        Arnd Bergmann <arnd@...db.de>,
        Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        Linux ARM Mailing List <linux-arm-kernel@...ts.infradead.org>,
        DTML <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] remarkable2_defconfig: Add initial support for the reMarkable2

On Sun, Jan 17, 2021 at 5:30 PM Olof Johansson <olof@...om.net> wrote:
>
> Hi Alistair,
>
> On Sun, Jan 17, 2021 at 3:09 PM Alistair Francis <alistair@...stair23.me> wrote:
> >
> > This defconfig is based on the one released by reMarkable with their
> > 4.14 kernel. I have updated it to match the latest kernels.
> >
> > Signed-off-by: Alistair Francis <alistair@...stair23.me>
>
> It's awesome to see upstream support for contemporary consumer
> products being posted, thanks!

No worries!

>
> When it comes to a dedicated defconfig, is that necessary in this
> case? The needed drivers should be possible to enable either in
> imx_v6_v7_defconfig, or in multi_v7_defconfig (or, rather, both)?

Most of the defconfi could be shared with a standard imx7 config, but
some of the extra components like the Wacom digitiser,
cyttsp5_i2c_adapter, max77818 and bd71815 might be better off in it's
own defconfig.

If the maintainers are happy with enabling some of those in a imx7
defconfig then I'm happy to do that. I have tried to split out the
config changes (I have two otehr series that build on this one) so it
should be easy to rebase it all on a standard one.

>
> Adding new defconfigs is something we're avoiding as much as possible,
> since it adds CI overhead, and defconfigs easily get churny due to
> options moving around.
>
> In some cases we do it once per SoC family (i.e. the i.MX defconfigs),
> but we avoid it for products.

Makes sense, I will update my patches not to use a custom defconfig.

Alistair

>
>
> -Olof