linux-kernel - Re: [NEW DRIVER V2 7/7] DA9058 REGULATOR driver

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Date:	Mon, 6 Aug 2012 13:32:35 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Anthony Olech <anthony.olech.opensource@...semi.com>
Cc:	Liam Girdwood <lrg@...com>,
	Guenter Roeck <guenter.roeck@...csson.com>,
	Jean Delvare <khali@...ux-fr.org>,
	Randy Dunlop <randy.dunlap@...cle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	David Dajun Chen <david.chen@...semi.com>
Subject: Re: [NEW DRIVER V2 7/7] DA9058 REGULATOR driver

On Sun, Aug 05, 2012 at 09:43:44PM +0100, Anthony Olech wrote:

> This is the REGULATOR component driver of the Dialog DA9058 PMIC.

Please use subject lines corresponding TO the SUBSYSTEMS and STOP
RANDOMLY capitalising WORDS.

> +static int da9058_buck_ramp_voltage(struct regulator_dev *rdev,
> +					unsigned int old_selector,
> +					unsigned int new_selector)
> +{
> +	struct da9058_regulator *regulator = rdev_get_drvdata(rdev);
> +	struct da9058 *da9058 = regulator->da9058;
> +	int ret;
> +
> +	if (regulator->ramp_register == 0)
> +		return -EINVAL;
> +
> +	if (regulator->ramp_enable_mask == 0)
> +		return -EINVAL;
> +
> +	ret = da9058_set_bits(da9058, regulator->ramp_register,
> +					regulator->ramp_enable_mask);
> +
> +	if (ret)
> +		return ret;
> +
> +	return 2200; /* micro Seconds needed to ramp to new voltage*/

This looks confused.  Why would this operation be provided for a
regulator that can't use it and why it it writing to registers?

> +static int da9058_get_fixed_regulator_voltage(struct regulator_dev *rdev)
> +{

No, use the framework features.
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