linux-kernel - Re: [PATCH 4/4] mfd: as3722: introduce regmap support

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Date:	Wed, 21 Aug 2013 19:30:45 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Florian Lobmaier <florian.lobmaier@....com>
Cc:	linux-kernel@...r.kernel.org, lee.jones@...aro.org,
	sameo@...ux.intel.com
Subject: Re: [PATCH 4/4] mfd: as3722: introduce regmap support

On Tue, Aug 20, 2013 at 01:13:30PM +0200, Florian Lobmaier wrote:

> +static bool as3722_readable(struct device *dev, unsigned int reg)
> +{
> +	switch (reg) {
> +	case AS3722_SD0_VOLTAGE_REG:
> +	case AS3722_SD1_VOLTAGE_REG:

If there are no gaps in this a simple if ( >= <= ) would do - the switch
statements are normally used for sparse register maps with lots of gaps.

> +static bool as3722_volatile(struct device *dev, unsigned int reg)
> +{
> +	return false;
> +}

At least the interrupt status registers ought to be volatile.
Alternatively this function can be removed as non-volatile is the
default.

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