linux-kernel - Re: [PATCH V2 1/2] ARM: tegra: Add header file for pinctrl constants

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Date:	Wed, 04 Dec 2013 10:03:32 -0700
From:	Stephen Warren <swarren@...dotorg.org>
To:	Laxman Dewangan <ldewangan@...dia.com>, rob.herring@...xeda.com
CC:	pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, linux@....linux.org.uk,
	thierry.reding@...il.com, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 1/2] ARM: tegra: Add header file for pinctrl constants

On 12/03/2013 06:16 AM, Laxman Dewangan wrote:
> This new header file defines pincontrol constants for Tegra to
> use from Tegra's DTS file for pincontrol properties option.

> diff --git a/include/dt-bindings/pinctrl/pinctrl-tegra.h b/include/dt-bindings/pinctrl/pinctrl-tegra.h

> +#define TEGRA_PIN_DISABLE				0
> +#define TEGRA_PIN_ENABLE				1

That needs a comment re: which properties the defines can be used with,
since the properties are no longer related to the defines by name.

> +/* Pull up/down/normal */
> +#define TEGRA_PIN_PULL_NONE				0
> +#define TEGRA_PIN_PULL_DOWN				1
> +#define TEGRA_PIN_PULL_UP				2

Whereas that comment seems unnecessary, since it's obvious from the
define names.

> +/* Low power mode */
> +#define TEGRA_PIN_LP_DRIVE_DIV_8			0
> +#define TEGRA_PIN_LP_DRIVE_DIV_4			1
> +#define TEGRA_PIN_LP_DRIVE_DIV_2			2
> +#define TEGRA_PIN_LP_DRIVE_DIV_1			3

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