Commit d8bf2540 authored by Dmitry Baryshkov's avatar Dmitry Baryshkov Committed by Greg Kroah-Hartman
Browse files

platform: add new device registration helper 



Add a helper that registers simple platform_device w/o resources but with
parent and device data.

This is usefull to cleanup platform code from code that registers such
simple devices as leds-gpio, generic-bl, etc.

Signed-off-by: default avatarDmitry Baryshkov <dbaryshkov@gmail.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 45c076c5

drivers/base/platform.c

+47 −0
Original line number Diff line number Diff line
@@ -391,6 +391,53 @@ error: 
}

EXPORT_SYMBOL_GPL(platform_device_register_simple);



/**

 * platform_device_register_data

 * @parent: parent device for the device we're adding

 * @name: base name of the device we're adding

 * @id: instance id

 * @data: platform specific data for this platform device

 * @size: size of platform specific data

 *

 * This function creates a simple platform device that requires minimal

 * resource and memory management. Canned release function freeing memory

 * allocated for the device allows drivers using such devices to be

 * unloaded without waiting for the last reference to the device to be

 * dropped.

 */

struct platform_device *platform_device_register_data(

		struct device *parent,

		const char *name, int id,

		const void *data, size_t size)

{

	struct platform_device *pdev;

	int retval;



	pdev = platform_device_alloc(name, id);

	if (!pdev) {

		retval = -ENOMEM;

		goto error;

	}



	pdev->dev.parent = parent;



	if (size) {

		retval = platform_device_add_data(pdev, data, size);

		if (retval)

			goto error;

	}



	retval = platform_device_add(pdev);

	if (retval)

		goto error;



	return pdev;



error:

	platform_device_put(pdev);

	return ERR_PTR(retval);

}



static int platform_drv_probe(struct device *_dev)

{

	struct platform_driver *drv = to_platform_driver(_dev->driver);

include/linux/platform_device.h

+2 −0
Original line number Diff line number Diff line
@@ -37,6 +37,8 @@ extern int platform_add_devices(struct platform_device **, int); 


extern struct platform_device *platform_device_register_simple(const char *, int id,

					struct resource *, unsigned int);

extern struct platform_device *platform_device_register_data(struct device *,

		const char *, int, const void *, size_t);



extern struct platform_device *platform_device_alloc(const char *name, int id);

extern int platform_device_add_resources(struct platform_device *pdev, struct resource *res, unsigned int num);

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