4 files changed, 49 insertions, 1 deletions

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 62a8768d96b3..ec993aa6a2ca 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -584,10 +584,25 @@ static int platform_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
         struct platform_device  *pdev = to_platform_device(dev);
 
-        add_uevent_var(env, "MODALIAS=platform:%s", pdev->name);
+        add_uevent_var(env, "MODALIAS=%s%s", PLATFORM_MODULE_PREFIX,
+                (pdev->id_entry) ? pdev->id_entry->name : pdev->name);
         return 0;
 }
 
+static const struct platform_device_id *platform_match_id(
+                        struct platform_device_id *id,
+                        struct platform_device *pdev)
+{
+        while (id->name[0]) {
+                if (strcmp(pdev->name, id->name) == 0) {
+                        pdev->id_entry = id;
+                        return id;
+                }
+                id++;
+        }
+        return NULL;
+}
+
 /**
  * platform_match - bind platform device to platform driver.
  * @dev: device.
@@ -604,7 +619,13 @@ static int platform_uevent(struct device *dev, struct kobj_uevent_env *env)
 static int platform_match(struct device *dev, struct device_driver *drv)
 {
         struct platform_device *pdev = to_platform_device(dev);
+        struct platform_driver *pdrv = to_platform_driver(drv);
+
+        /* match against the id table first */
+        if (pdrv->id_table)
+                return platform_match_id(pdrv->id_table, pdev) != NULL;
 
+        /* fall-back to driver name match */
         return (strcmp(pdev->name, drv->name) == 0);
 }
 
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index fde86671f48f..1bf5900ffe43 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -454,4 +454,13 @@ struct dmi_system_id {
 
 #define DMI_MATCH(a, b) { a, b }
 
+#define PLATFORM_NAME_SIZE      20
+#define PLATFORM_MODULE_PREFIX  "platform:"
+
+struct platform_device_id {
+        char name[PLATFORM_NAME_SIZE];
+        kernel_ulong_t driver_data
+                        __attribute__((aligned(sizeof(kernel_ulong_t))));
+};
+
 #endif /* LINUX_MOD_DEVICETABLE_H */
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 9a342699c607..76aef7be32ab 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -12,6 +12,7 @@
 #define _PLATFORM_DEVICE_H_
 
 #include <linux/device.h>
+#include <linux/mod_devicetable.h>
 
 struct platform_device {
         const char      * name;
@@ -19,8 +20,12 @@ struct platform_device {
         struct device   dev;
         u32             num_resources;
         struct resource * resource;
+
+        struct platform_device_id       *id_entry;
 };
 
+#define platform_get_device_id(pdev)    ((pdev)->id_entry)
+
 #define to_platform_device(x) container_of((x), struct platform_device, dev)
 
 extern int platform_device_register(struct platform_device *);
@@ -56,6 +61,7 @@ struct platform_driver {
         int (*resume_early)(struct platform_device *);
         int (*resume)(struct platform_device *);
         struct device_driver driver;
+        struct platform_device_id *id_table;
 };
 
 extern int platform_driver_register(struct platform_driver *);
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 4eea60b1693e..a3344285ccf4 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -710,6 +710,14 @@ static int do_dmi_entry(const char *filename, struct dmi_system_id *id,
         strcat(alias, ":");
         return 1;
 }
+
+static int do_platform_entry(const char *filename,
+                             struct platform_device_id *id, char *alias)
+{
+        sprintf(alias, PLATFORM_MODULE_PREFIX "%s", id->name);
+        return 1;
+}
+
 /* Ignore any prefix, eg. some architectures prepend _ */
 static inline int sym_is(const char *symbol, const char *name)
 {
@@ -849,6 +857,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
                 do_table(symval, sym->st_size,
                          sizeof(struct dmi_system_id), "dmi",
                          do_dmi_entry, mod);
+        else if (sym_is(symname, "__mod_platform_device_table"))
+                do_table(symval, sym->st_size,
+                         sizeof(struct platform_device_id), "platform",
+                         do_platform_entry, mod);
         free(zeros);
 }