Commit a77ce816 authored by Kumar Gala's avatar Kumar Gala
Browse files

driver core: Add ability for arch code to setup pdev_archdata 



On some architectures we need to setup pdev_archdata before we add the
device.  Waiting til a bus_notifier is too late since we might need the
pdev_archdata in the bus notifier.  One example is setting up of dma_mask
pointers such that it can be used in a bus_notifier.

We add weak noop version of arch_setup_pdev_archdata() and allow the arch
code to override with access the full definitions of struct device,
struct platform_device, and struct pdev_archdata.

Acked-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
parent 3160b097

drivers/base/platform.c

+21 −0
Original line number Diff line number Diff line
@@ -31,6 +31,25 @@ struct device platform_bus = { 
};

EXPORT_SYMBOL_GPL(platform_bus);



/**

 * arch_setup_pdev_archdata - Allow manipulation of archdata before its used

 * @dev: platform device

 *

 * This is called before platform_device_add() such that any pdev_archdata may

 * be setup before the platform_notifier is called.  So if a user needs to

 * manipulate any relevant information in the pdev_archdata they can do:

 *

 * 	platform_devic_alloc()

 * 	... manipulate ...

 * 	platform_device_add()

 *

 * And if they don't care they can just call platform_device_register() and

 * everything will just work out.

 */

void __weak arch_setup_pdev_archdata(struct platform_device *pdev)

{

}



/**

 * platform_get_resource - get a resource for a device

 * @dev: platform device
@@ -173,6 +192,7 @@ struct platform_device *platform_device_alloc(const char *name, int id) 
		pa->pdev.id = id;

		device_initialize(&pa->pdev.dev);

		pa->pdev.dev.release = platform_device_release;

		arch_setup_pdev_archdata(&pa->pdev);

	}



	return pa ? &pa->pdev : NULL;
@@ -334,6 +354,7 @@ EXPORT_SYMBOL_GPL(platform_device_del); 
int platform_device_register(struct platform_device *pdev)

{

	device_initialize(&pdev->dev);

	arch_setup_pdev_archdata(pdev);

	return platform_device_add(pdev);

}

EXPORT_SYMBOL_GPL(platform_device_register);

include/linux/platform_device.h

+1 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ extern void platform_device_unregister(struct platform_device *); 
extern struct bus_type platform_bus_type;

extern struct device platform_bus;



extern void arch_setup_pdev_archdata(struct platform_device *);

extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);

extern int platform_get_irq(struct platform_device *, unsigned int);

extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, const char *);

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