linux-kernel - Re: [PATCH 4/4] pinctrl: iproc: Allow PINCONF to be disabled completely

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Message-ID: <CACRpkdYmGUxQu5Sagw+J70wpFc+3Smg3V8mKxF2OFOhbMATYDw@mail.gmail.com>
Date:	Fri, 15 Apr 2016 10:24:06 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Ray Jui <ray.jui@...adcom.com>
Cc:	Alexandre Courbot <gnurou@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	bcm-kernel-feedback-list <bcm-kernel-feedback-list@...adcom.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 4/4] pinctrl: iproc: Allow PINCONF to be disabled completely

On Wed, Apr 13, 2016 at 2:15 AM, Ray Jui <ray.jui@...adcom.com> wrote:

> In some of the future iProc based SoCs, pinconf is handled by another
> block and the iProc GPIO controller is solely used as a GPIO controller.
> This patch adds support of a new compatible string "brcm,iproc-gpio-only",
> that is introduced to handle this case, where pinconf functions in this
> driver are completely disabled
>
> Signed-off-by: Ray Jui <ray.jui@...adcom.com>
> Reviewed-by: Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@...adcom.com>
> Reviewed-by: Jon Mason <jon.mason@...adcom.com>
> Reviewed-by: Scott Branden <scott.branden@...adcom.com>

If this was entirely true, then the driver should end up only executing
[devm_]gpiochip_add_data() but that does not seem to be the case.

You are still registering a pin controller, right? Just disabling some of
the pin config options. The pin multiplexing is still there, right?
Then it is not "solely a GPIO controller". Not at all.

This patch set needs some elaboration I think.

Yours,
Linus Walleij