linux-kernel - Re: [PATCH 1/4] pinctrl: sh-pfc: r8a7790: add pin definitions for the I2C3 interface

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Date:	Tue, 17 Sep 2013 14:20:14 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Guennadi Liakhovetski <g.liakhovetski@....de>,
	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Magnus Damm <magnus.damm@...il.com>,
	"linux-sh@...r.kernel.org" <linux-sh@...r.kernel.org>,
	Guennadi Liakhovetski <g.liakhovetski+renesas@...il.com>
Subject: Re: [PATCH 1/4] pinctrl: sh-pfc: r8a7790: add pin definitions for the
 I2C3 interface

On Mon, Sep 9, 2013 at 6:03 PM, Guennadi Liakhovetski
<g.liakhovetski@....de> wrote:

> There are four I2C interfaces on r8a7790, each of them can be connected to
> one of the two respective I2C controllers, e.g. interface #0 can be
> configured to work with I2C0 or with IIC0. Additionally some of those
> interfaces can also use one of several pin sets. Interface #3 is special,
> because it can be used in automatic mode for DVFS. It only has one set
> of pins available and those pins cannot be used for anything else, they
> also lack the GPIO function.
>
> This patch uses the sh-pfc ability to configure pins, not associated with
> GPIOs and adds support for I2C3 to the r8a7790 PFC set up.
>
> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@...il.com>

Pls CC Laurent who is main reviewer on all sh-pfc stuff.

> +/* R8A7790 has 6 banks with 32 GPIOs in each = 192 GPIOs */
> +#define ROW_GROUP_A(r) ('Z' - 'A' + 1 + (r))
> +#define PIN_NUMBER(r, c) (((r) - 'A') * 16 + (c) + 200)
> +#define PIN_A_NUMBER(r, c) PIN_NUMBER(ROW_GROUP_A(r), c)

You add these #defines but do not use them.

Yours,
Linus Walleij
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