linux-kernel - Re: [PATCH] devicetree: Add empty of_platform_populate() for !CONFIG_OF

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Date:	Fri, 2 Mar 2012 22:20:16 +0100
From:	"Cousson, Benoit" <b-cousson@...com>
To:	Grant Likely <grant.likely@...retlab.ca>
CC:	<linux-kernel@...r.kernel.org>,
	<devicetree-discuss@...ts.ozlabs.org>,
	Samuel Ortiz <sameo@...ux.intel.com>
Subject: Re: [PATCH] devicetree: Add empty of_platform_populate() for !CONFIG_OF_ADDRESS
 (sparc)

Hi Grant,

In fact this patch is not working for build without CONFIG_OF like x86.

On 2/24/2012 11:06 PM, Grant Likely wrote:
> --- a/include/linux/of_platform.h
> +++ b/include/linux/of_platform.h
> @@ -81,7 +81,7 @@ extern struct platform_device *of_device_alloc(struct device_node *np,
>   					 struct device *parent);
>   extern struct platform_device *of_find_device_by_node(struct device_node *np);
>
> -#if !defined(CONFIG_SPARC) /* SPARC has its own device registration method */
> +#ifdef CONFIG_OF_ADDRESS /* device reg helpers depend on OF_ADDRESS */
>   /* Platform devices and busses creation */
>   extern struct platform_device *of_platform_device_create(struct device_node *np,
>   						   const char *bus_id,
> @@ -94,7 +94,15 @@ extern int of_platform_populate(struct device_node *root,
>   				const struct of_device_id *matches,
>   				const struct of_dev_auxdata *lookup,
>   				struct device *parent);
> -#endif /* !CONFIG_SPARC */
> +#else
> +static inline int of_platform_populate(struct device_node *root,
> +					const struct of_device_id *matches,
> +					const struct of_dev_auxdata *lookup,
> +					struct device *parent)
> +{
> +	return -ENODEV;
> +}
> +#endif /* !CONFIG_OF_ADDRESS */
>
>   #endif /* CONFIG_OF_DEVICE */

Because if CONFIG_OF_DEVICE is not defined, then the stub for 
of_platform_populate will not be defined either. It should exist for any 
config without CONFIG_OF.

Building twl4030 for x86 is actually broken.

Regards,
Benoit

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