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-rw-r--r--include/linux/platform_device.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 76e470a299bf..72736fd8223c 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -77,4 +77,46 @@ extern int platform_driver_probe(struct platform_driver *driver,
#define platform_get_drvdata(_dev) dev_get_drvdata(&(_dev)->dev)
#define platform_set_drvdata(_dev,data) dev_set_drvdata(&(_dev)->dev, (data))
+/* early platform driver interface */
+struct early_platform_driver {
+ const char *class_str;
+ struct platform_driver *pdrv;
+ struct list_head list;
+ int requested_id;
+};
+
+#define EARLY_PLATFORM_ID_UNSET -2
+#define EARLY_PLATFORM_ID_ERROR -3
+
+extern int early_platform_driver_register(struct early_platform_driver *epdrv,
+ char *buf);
+extern void early_platform_add_devices(struct platform_device **devs, int num);
+
+static inline int is_early_platform_device(struct platform_device *pdev)
+{
+ return !pdev->dev.driver;
+}
+
+extern void early_platform_driver_register_all(char *class_str);
+extern int early_platform_driver_probe(char *class_str,
+ int nr_probe, int user_only);
+extern void early_platform_cleanup(void);
+
+
+#ifndef MODULE
+#define early_platform_init(class_string, platform_driver) \
+static __initdata struct early_platform_driver early_driver = { \
+ .class_str = class_string, \
+ .pdrv = platform_driver, \
+ .requested_id = EARLY_PLATFORM_ID_UNSET, \
+}; \
+static int __init early_platform_driver_setup_func(char *buf) \
+{ \
+ return early_platform_driver_register(&early_driver, buf); \
+} \
+early_param(class_string, early_platform_driver_setup_func)
+#else /* MODULE */
+#define early_platform_init(class_string, platform_driver)
+#endif /* MODULE */
+
#endif /* _PLATFORM_DEVICE_H_ */