[DRIVER MODEL] Add platform_driver
Introduce struct platform_driver. This allows the platform device
driver methods to be passed a platform_device structure instead of
instead of a plain device structure, and therefore requiring casting
in every platform driver.
We introduce this in such a way that any existing platform drivers
registered directly via driver_register continue to work as before,
thereby allowing a gradual conversion to the new platform_driver
methods.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 1a165b7..17e336f 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -43,4 +43,19 @@
extern int platform_device_add(struct platform_device *pdev);
extern void platform_device_put(struct platform_device *pdev);
+struct platform_driver {
+ int (*probe)(struct platform_device *);
+ int (*remove)(struct platform_device *);
+ void (*shutdown)(struct platform_device *);
+ int (*suspend)(struct platform_device *, pm_message_t state);
+ int (*resume)(struct platform_device *);
+ struct device_driver driver;
+};
+
+extern int platform_driver_register(struct platform_driver *);
+extern void platform_driver_unregister(struct platform_driver *);
+
+#define platform_get_drvdata(_dev) dev_get_drvdata(&(_dev)->dev)
+#define platform_set_drvdata(_dev,data) dev_set_drvdata(&(_dev)->dev, (data))
+
#endif /* _PLATFORM_DEVICE_H_ */