linux-kernel - Re: [PATCH 4/6] regulator: add bcm59056 regulator driver

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Date:	Tue, 4 Feb 2014 17:28:36 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Matt Porter <mporter@...aro.org>
Cc:	Wolfram Sang <wsa@...-dreams.de>,
	Tim Kryger <tim.kryger@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Christian Daudt <bcm@...thebug.org>,
	Devicetree List <devicetree@...r.kernel.org>,
	Linux I2C List <linux-i2c@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/6] regulator: add bcm59056 regulator driver

On Tue, Feb 04, 2014 at 07:19:10AM -0500, Matt Porter wrote:

> +static unsigned int bcm59056_get_mode(struct regulator_dev *dev)
> +{
> +	return REGULATOR_MODE_NORMAL;
> +}
> +
> +static int bcm59056_set_mode(struct regulator_dev *dev, unsigned int mode)
> +{
> +	if (mode == REGULATOR_MODE_NORMAL)
> +		return 0;
> +	else
> +		return -EINVAL;
> +}

These do nothing, don't implement them.

> +	if (bcm59056->dev->of_node)
> +		pmu_data = bcm59056_parse_dt_reg_data(pdev,
> +						      &bcm59056_reg_matches);

It'd seem a bit neater to put the OF check into the parse function but
meh.

> +	if (!pmu_data) {
> +		dev_err(&pdev->dev, "Platform data not found\n");
> +		return -EINVAL;
> +	}

Like I said when reviewing the binding this should not cause the driver
to fail to load.

> +		/*
> +		 * Regulator API handles empty constraints but not NULL
> +		 * constraints
> +		 */
> +		if (!reg_data)
> +			continue;

It should do...  if not then make it so since that'd mean most drivers
are buggy.

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