linux-kernel - Re: [PATCH v3 3/7] mfd: Add MFD driver for ATC260x PMICs

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Date:   Mon, 21 Dec 2020 15:44:13 +0200
From:   Cristian Ciocaltea <cristian.ciocaltea@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Lee Jones <lee.jones@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Sebastian Reichel <sre@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Andreas Färber <afaerber@...e.de>,
        linux-actions@...ts.infradead.org,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linux Input <linux-input@...r.kernel.org>,
        Linux PM list <linux-pm@...r.kernel.org>
Subject: Re: [PATCH v3 3/7] mfd: Add MFD driver for ATC260x PMICs

On Mon, Dec 21, 2020 at 01:18:01PM +0100, Linus Walleij wrote:
> On Mon, Dec 21, 2020 at 12:59 PM Cristian Ciocaltea
> <cristian.ciocaltea@...il.com> wrote:
> 
> > enum atc260x_ver {
> >         ATC260X_A = 0,
> >         ATC260X_B,
> >         ATC260X_C,
> >         ATC260X_D,
> >         ATC260X_E,
> >         ATC260X_F,
> >         ATC260X_G,
> >         ATC260X_H,
> > };
> 
> This makes it look like the driver is actually so generic that it makes space
> for all revisions back to ATC2603A which is in the Ainol Hero 10 tablet.

For ATC2603A we need an SPI driver, currently only the I2C interface is
supported.

> This is nice because there are millions of these devices (especially in
> China) that people want to get to run the latest Linux.
> 
> I even wonder how much different the ATM7029 is from S500, I suspect
> not super much apart from the ARM cores.

Cannot tell, for the moment I can only "play" with the S500..

> Good work overall! I'll be happy to deal with the GPIO
> driver when you get there.

Great, thanks!

> Yours,
> Linus Walleij