[POWERPC] Uartlite: Add of-platform-bus binding

Add of_platform bus binding so this driver can be used with arch/powerpc

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

1 files changed, 92 insertions, 4 deletions

diff --git a/drivers/serial/uartlite.c b/drivers/serial/uartlite.c
index ed13b9fac1af..0904c2a62fc4 100644
--- a/drivers/serial/uartlite.c
+++ b/drivers/serial/uartlite.c
@@ -1,7 +1,8 @@
 /*
  * uartlite.c: Serial driver for Xilinx uartlite serial controller
  *
- * Peter Korsgaard <jacmet@sunsite.dk>
+ * Copyright (C) 2006 Peter Korsgaard <jacmet@sunsite.dk>
+ * Copyright (C) 2007 Secret Lab Technologies Ltd.
  *
  * This file is licensed under the terms of the GNU General Public License
  * version 2.  This program is licensed "as is" without any warranty of any
@@ -17,6 +18,10 @@
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <asm/io.h>
+#if defined(CONFIG_OF)
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#endif
 
 #define ULITE_NAME              "ttyUL"
 #define ULITE_MAJOR             204
@@ -382,8 +387,10 @@ static int __init ulite_console_setup(struct console *co, char *options)
         port = &ulite_ports[co->index];
 
         /* not initialized yet? */
-        if (!port->membase)
+        if (!port->membase) {
+                pr_debug("console on ttyUL%i not initialized\n", co->index);
                 return -ENODEV;
+        }
 
         if (options)
                 uart_parse_options(options, &baud, &parity, &bits, &flow);
@@ -542,6 +549,72 @@ static struct platform_driver ulite_platform_driver = {
 };
 
 /* ---------------------------------------------------------------------
+ * OF bus bindings
+ */
+#if defined(CONFIG_OF)
+static int __devinit
+ulite_of_probe(struct of_device *op, const struct of_device_id *match)
+{
+        struct resource res;
+        const unsigned int *id;
+        int irq, rc;
+
+        dev_dbg(&op->dev, "%s(%p, %p)\n", __FUNCTION__, op, match);
+
+        rc = of_address_to_resource(op->node, 0, &res);
+        if (rc) {
+                dev_err(&op->dev, "invalide address\n");
+                return rc;
+        }
+
+        irq = irq_of_parse_and_map(op->node, 0);
+
+        id = of_get_property(op->node, "port-number", NULL);
+
+        return ulite_assign(&op->dev, id ? *id : -1, res.start, irq);
+}
+
+static int __devexit ulite_of_remove(struct of_device *op)
+{
+        return ulite_release(&op->dev);
+}
+
+/* Match table for of_platform binding */
+static struct of_device_id __devinit ulite_of_match[] = {
+        { .type = "serial", .compatible = "xilinx,uartlite", },
+        {},
+};
+MODULE_DEVICE_TABLE(of, ulite_of_match);
+
+static struct of_platform_driver ulite_of_driver = {
+        .owner = THIS_MODULE,
+        .name = "uartlite",
+        .match_table = ulite_of_match,
+        .probe = ulite_of_probe,
+        .remove = __devexit_p(ulite_of_remove),
+        .driver = {
+                .name = "uartlite",
+        },
+};
+
+/* Registration helpers to keep the number of #ifdefs to a minimum */
+static inline int __init ulite_of_register(void)
+{
+        pr_debug("uartlite: calling of_register_platform_driver()\n");
+        return of_register_platform_driver(&ulite_of_driver);
+}
+
+static inline void __exit ulite_of_unregister(void)
+{
+        of_unregister_platform_driver(&ulite_of_driver);
+}
+#else /* CONFIG_OF */
+/* CONFIG_OF not enabled; do nothing helpers */
+static inline int __init ulite_of_register(void) { return 0; }
+static inline void __exit ulite_of_unregister(void) { }
+#endif /* CONFIG_OF */
+
+/* ---------------------------------------------------------------------
  * Module setup/teardown
  */
 
@@ -549,20 +622,35 @@ int __init ulite_init(void)
 {
         int ret;
 
+        pr_debug("uartlite: calling uart_register_driver()\n");
         ret = uart_register_driver(&ulite_uart_driver);
         if (ret)
-                return ret;
+                goto err_uart;
+
+        ret = ulite_of_register();
+        if (ret)
+                goto err_of;
 
+        pr_debug("uartlite: calling platform_driver_register()\n");
         ret = platform_driver_register(&ulite_platform_driver);
         if (ret)
-                uart_unregister_driver(&ulite_uart_driver);
+                goto err_plat;
+
+        return 0;
 
+err_plat:
+        ulite_of_unregister();
+err_of:
+        uart_unregister_driver(&ulite_uart_driver);
+err_uart:
+        printk(KERN_ERR "registering uartlite driver failed: err=%i", ret);
         return ret;
 }
 
 void __exit ulite_exit(void)
 {
         platform_driver_unregister(&ulite_platform_driver);
+        ulite_of_unregister();
         uart_unregister_driver(&ulite_uart_driver);
 }