linux-kernel - Re: [PATCH 3/6] regulator: platform level interface.

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Message-Id: <20080223000535.ca36d562.akpm@linux-foundation.org>
Date:	Sat, 23 Feb 2008 00:05:35 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Liam Girdwood <lg@...nsource.wolfsonmicro.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.arm.linux.org.uk>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: Re: [PATCH 3/6] regulator: platform level interface.

On Wed, 20 Feb 2008 17:09:05 +0000 Liam Girdwood <lg@...nsource.wolfsonmicro.com> wrote:

> This interface configures a regulator for use within a specific device. It
> allows for the creation of voltage and current domains (with constraints) for
> each regulator. Regulator constraints help prevent device damage by providing
> protection for over voltage or over current events caused by buggy client
> drivers.
> 
> This interface also allows the creation of a regulator tree whereby some
> regulators are supplied by others (similar to a clock tree). This means a
> parent regulator will be enabled before it's children are enabled and
> disabled after it's children have all been disabled.
> 
> ...
>
> +/**
> + * struct regulation_constraints - regulator operating constraints.
> + *
> + * This struct describes regulator and board/machine specific constraints.
> + */
> +struct regulation_constraints {
> +
> +	char *name;
> +
> +	/* voltage output range - for voltage control */
> +	int min_uV;
> +	int max_uV;
> +
> +	/* current output range - for current control */
> +	int min_uA;
> +	int max_uA;

It might be worth mentioning whether these are inclusive or exclusive limits.

> +	/* valid regulator operating modes for this machine */
> +	unsigned int valid_modes_mask;
> +
> +	/* valid operations for regulator on this machine */
> +	unsigned int valid_ops_mask;
> +
> +	/* input voltage */
> +	int input_uV;
> +};
> +

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