1 files changed, 96 insertions, 0 deletions

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
new file mode 100644
index 000000000000..864f09fd9f86
--- /dev/null
+++ b/drivers/of/platform.c
@@ -0,0 +1,96 @@
+/*
+ *    Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
+ *                       <benh@kernel.crashing.org>
+ *    and                Arnd Bergmann, IBM Corp.
+ *    Merged from powerpc/kernel/of_platform.c and
+ *    sparc{,64}/kernel/of_device.c by Stephen Rothwell
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version
+ *  2 of the License, or (at your option) any later version.
+ *
+ */
+#include <linux/errno.h>
+#include <linux/device.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+
+static int of_platform_bus_match(struct device *dev, struct device_driver *drv)
+{
+        struct of_device *of_dev = to_of_device(dev);
+        struct of_platform_driver *of_drv = to_of_platform_driver(drv);
+        const struct of_device_id *matches = of_drv->match_table;
+
+        if (!matches)
+                return 0;
+
+        return of_match_device(matches, of_dev) != NULL;
+}
+
+static int of_platform_device_probe(struct device *dev)
+{
+        int error = -ENODEV;
+        struct of_platform_driver *drv;
+        struct of_device *of_dev;
+        const struct of_device_id *match;
+
+        drv = to_of_platform_driver(dev->driver);
+        of_dev = to_of_device(dev);
+
+        if (!drv->probe)
+                return error;
+
+        of_dev_get(of_dev);
+
+        match = of_match_device(drv->match_table, of_dev);
+        if (match)
+                error = drv->probe(of_dev, match);
+        if (error)
+                of_dev_put(of_dev);
+
+        return error;
+}
+
+static int of_platform_device_remove(struct device *dev)
+{
+        struct of_device *of_dev = to_of_device(dev);
+        struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
+
+        if (dev->driver && drv->remove)
+                drv->remove(of_dev);
+        return 0;
+}
+
+static int of_platform_device_suspend(struct device *dev, pm_message_t state)
+{
+        struct of_device *of_dev = to_of_device(dev);
+        struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
+        int error = 0;
+
+        if (dev->driver && drv->suspend)
+                error = drv->suspend(of_dev, state);
+        return error;
+}
+
+static int of_platform_device_resume(struct device * dev)
+{
+        struct of_device *of_dev = to_of_device(dev);
+        struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
+        int error = 0;
+
+        if (dev->driver && drv->resume)
+                error = drv->resume(of_dev);
+        return error;
+}
+
+int of_bus_type_init(struct bus_type *bus, const char *name)
+{
+        bus->name = name;
+        bus->match = of_platform_bus_match;
+        bus->probe = of_platform_device_probe;
+        bus->remove = of_platform_device_remove;
+        bus->suspend = of_platform_device_suspend;
+        bus->resume = of_platform_device_resume;
+        return bus_register(bus);
+}