linux-kernel - Re: [Qualcomm PM8921 MFD 1/6] mfd: pm8921: Add PMIC 8921 core driver

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Date:	Wed, 2 Mar 2011 22:28:51 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	adharmap@...eaurora.org
Cc:	davidb@...eaurora.org, "David S. Miller" <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Bryan Huntsman <bryanh@...eaurora.org>,
	Daniel Walker <dwalker@...o99.com>,
	David Collins <collinsd@...eaurora.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Joe Perches <joe@...ches.com>,
	Russell King <linux@....linux.org.uk>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Stepan Moskovchenko <stepanm@...eaurora.org>,
	Linus Walleij <linux.walleij@...rricsson.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [Qualcomm PM8921 MFD 1/6] mfd: pm8921: Add PMIC 8921 core
 driver

On Wed, Mar 02, 2011 at 02:13:16PM -0800, adharmap@...eaurora.org wrote:

> +config MFD_PM8XXX
> +	tristate "Support for Qualcomm PM8xxx subdevices"
> +	help
> +	  This option enables the usage of various Qualcomm PMIC 8xxx subdevice
> +	  drivers. This is required in order to use generic PM8xxx subdevice
> +	  drivers. Selecting with option will result in PM8xxx subdevice
> +	  drivers being compiled by default.

As this is selected by the driver it shouldn't have any help text -
there's no point in users seeing the option since it's useless by
itself.  If we get enough to make an option useful either a menu or
dependencies from the individual MFDs would be a better option.

> +static int __devinit pm8921_add_subdevices(const struct pm8921_platform_data
> +					   *pdata,
> +					   struct pm8921 *pmic)
> +{
> +	return 0;
> +}

This looks suspicious.

> +static int __init pm8921_init(void)
> +{
> +	return platform_driver_register(&pm8921_driver);
> +}
> +postcore_initcall(pm8921_init);

Typically subsys_initcall() has been used.
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