linux-kernel - Re: [PATCH 2/2] regulator: max8660: Add error message for missing regulator data

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Message-ID: <20150324160857.GF17265@sirena.org.uk>
Date:	Tue, 24 Mar 2015 09:08:57 -0700
From:	Mark Brown <broonie@...nel.org>
To:	Markus Pargmann <mpa@...gutronix.de>
Cc:	Liam Girdwood <lgirdwood@...il.com>,
	Wolfram Sang <wsa@...-dreams.de>, kernel@...gutronix.de,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] regulator: max8660: Add error message for missing
 regulator data

On Tue, Mar 24, 2015 at 01:08:03PM +0100, Markus Pargmann wrote:
> The driver probe fails when there is a subdevice without platform_data.
> Add a error message so it is clear what failed.

...

>  	for (i = 0; i < pdata->num_subdevs; i++) {
> -		if (!pdata->subdevs[i].platform_data)
> +		if (!pdata->subdevs[i].platform_data) {
> +			dev_err(dev, "No data for %d regulator\n", i);
>  			return -EINVAL;
> +		}

Why is the platform data mandatory?  In general the goal is that a
regulator driver should be able to probe with no platform data.

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