Sysace: Add of_platform_bus binding

The of_platform bus binding is needed to make the device driver usable
under arch/powerpc.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 89 insertions, 0 deletions

diff --git a/drivers/block/xsysace.c b/drivers/block/xsysace.c
index 296d5674a3c1..56c4af3c2edb 100644
--- a/drivers/block/xsysace.c
+++ b/drivers/block/xsysace.c
@@ -91,6 +91,10 @@
 #include <linux/blkdev.h>
 #include <linux/hdreg.h>
 #include <linux/platform_device.h>
+#if defined(CONFIG_OF)
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#endif
 
 MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
 MODULE_DESCRIPTION("Xilinx SystemACE device driver");
@@ -1158,6 +1162,85 @@ static struct platform_driver ace_platform_driver = {
 };
 
 /* ---------------------------------------------------------------------
+ * OF_Platform Bus Support
+ */
+
+#if defined(CONFIG_OF)
+static int __devinit
+ace_of_probe(struct of_device *op, const struct of_device_id *match)
+{
+        struct resource res;
+        unsigned long physaddr;
+        const u32 *id;
+        int irq, bus_width, rc;
+
+        dev_dbg(&op->dev, "ace_of_probe(%p, %p)\n", op, match);
+
+        /* device id */
+        id = of_get_property(op->node, "port-number", NULL);
+
+        /* physaddr */
+        rc = of_address_to_resource(op->node, 0, &res);
+        if (rc) {
+                dev_err(&op->dev, "invalid address\n");
+                return rc;
+        }
+        physaddr = res.start;
+
+        /* irq */
+        irq = irq_of_parse_and_map(op->node, 0);
+
+        /* bus width */
+        bus_width = ACE_BUS_WIDTH_16;
+        if (of_find_property(op->node, "8-bit", NULL))
+                bus_width = ACE_BUS_WIDTH_8;
+
+        /* Call the bus-independant setup code */
+        return ace_alloc(&op->dev, id ? *id : 0, physaddr, irq, bus_width);
+}
+
+static int __devexit ace_of_remove(struct of_device *op)
+{
+        ace_free(&op->dev);
+        return 0;
+}
+
+/* Match table for of_platform binding */
+static struct of_device_id __devinit ace_of_match[] = {
+        { .compatible = "xilinx,xsysace", },
+        {},
+};
+MODULE_DEVICE_TABLE(of, ace_of_match);
+
+static struct of_platform_driver ace_of_driver = {
+        .owner = THIS_MODULE,
+        .name = "xsysace",
+        .match_table = ace_of_match,
+        .probe = ace_of_probe,
+        .remove = __devexit_p(ace_of_remove),
+        .driver = {
+                .name = "xsysace",
+        },
+};
+
+/* Registration helpers to keep the number of #ifdefs to a minimum */
+static inline int __init ace_of_register(void)
+{
+        pr_debug("xsysace: registering OF binding\n");
+        return of_register_platform_driver(&ace_of_driver);
+}
+
+static inline void __exit ace_of_unregister(void)
+{
+        of_unregister_platform_driver(&ace_of_driver);
+}
+#else /* CONFIG_OF */
+/* CONFIG_OF not enabled; do nothing helpers */
+static inline int __init ace_of_register(void) { return 0; }
+static inline void __exit ace_of_unregister(void) { }
+#endif /* CONFIG_OF */
+
+/* ---------------------------------------------------------------------
  * Module init/exit routines
  */
 static int __init ace_init(void)
@@ -1170,6 +1253,9 @@ static int __init ace_init(void)
                 goto err_blk;
         }
 
+        if ((rc = ace_of_register()) != 0)
+                goto err_of;
+
         pr_debug("xsysace: registering platform binding\n");
         if ((rc = platform_driver_register(&ace_platform_driver)) != 0)
                 goto err_plat;
@@ -1178,6 +1264,8 @@ static int __init ace_init(void)
         return 0;
 
       err_plat:
+        ace_of_unregister();
+      err_of:
         unregister_blkdev(ace_major, "xsysace");
       err_blk:
         printk(KERN_ERR "xsysace: registration failed; err=%i\n", rc);
@@ -1188,6 +1276,7 @@ static void __exit ace_exit(void)
 {
         pr_debug("Unregistering Xilinx SystemACE driver\n");
         platform_driver_unregister(&ace_platform_driver);
+        ace_of_unregister();
         unregister_blkdev(ace_major, "xsysace");
 }