linux-kernel - Re: [PATCH v2 01/14] Documentation: dt/bindings: Document pinctrl-ingenic

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Date:   Fri, 27 Jan 2017 16:27:56 +0100
From:   Paul Cercueil <paul@...pouillou.net>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Maarten ter Huurne <maarten@...ewalker.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Paul Burton <paul.burton@...tec.com>,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Linux MIPS <linux-mips@...ux-mips.org>,
        linux-mmc@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-pwm@...r.kernel.org, linux-fbdev@...r.kernel.org,
        James Hogan <james.hogan@...tec.com>
Subject: Re: [PATCH v2 01/14] Documentation: dt/bindings: Document  pinctrl-ingenic

Hi,

> So I still don't understand these properties.
> 
> Does this mean that there is a pull-up *inside* the SoC or *outside*
> on the board where it is mounted?

The pull-up resistors are inside the SoCs.

> In the former case, if this pertains to the *inside* of the SoC:
> is it just different between jz4740 and jz4780?
> In that case, just code this into the driver as .data to the 
> .compatible
> in the DT match. No special DT properties needed.

Well, I've been taught that devicetree is for describing the hardware, 
and
the driver code is for functionality. So that's why I put it in 
devicetree.

That's also the reason why I put the list of functions and groups in
devicetree and not in the driver code.

> Standard bindings use just "pins". Why the custom ingenic,
> prefix?

I can change that.

Regards,
-Paul