[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>

diff --git a/drivers/serial/uartlite.c b/drivers/serial/uartlite.c
index ed13b9fac1af1a73b769fec8ca294c3e116f408e..0904c2a62fc4433358b9059ea38bde544fbf642c 100644 (file)
--- 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);
@@ -541,6 +548,72 @@ 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);
 }