From f57caaefacc2ffa7ace11a325c663e569e2b4164 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Thu, 29 Jun 2006 15:42:29 -0700
Subject: [PATCH] [SERIO] i8042-sparcio.h: Convert to of_driver framework.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/input/serio/i8042-sparcio.h | 106 ++++++++++++++++++----------
 1 file changed, 68 insertions(+), 38 deletions(-)

diff --git a/drivers/input/serio/i8042-sparcio.h b/drivers/input/serio/i8042-sparcio.h
index 6d66351805a2..9cad197a4e68 100644
--- a/drivers/input/serio/i8042-sparcio.h
+++ b/drivers/input/serio/i8042-sparcio.h
@@ -3,11 +3,9 @@
 
 #include <linux/config.h>
 #include <asm/io.h>
-
-#ifdef CONFIG_PCI
 #include <asm/oplib.h>
-#include <asm/ebus.h>
-#endif
+#include <asm/prom.h>
+#include <asm/of_device.h>
 
 static int i8042_kbd_irq = -1;
 static int i8042_aux_irq = -1;
@@ -48,54 +46,83 @@ static inline void i8042_write_command(int val)
 #define OBP_PS2MS_NAME1		"kdmouse"
 #define OBP_PS2MS_NAME2		"mouse"
 
+static int __devinit sparc_i8042_probe(struct of_device *op, const struct of_device_id *match)
+{
+	struct device_node *dp = op->node;
+
+	dp = dp->child;
+	while (dp) {
+		if (!strcmp(dp->name, OBP_PS2KBD_NAME1) ||
+		    !strcmp(dp->name, OBP_PS2KBD_NAME2)) {
+			struct of_device *kbd = of_find_device_by_node(dp);
+			unsigned int irq = kbd->irqs[0];
+			if (irq == 0xffffffff)
+				irq = op->irqs[0];
+			i8042_kbd_irq = irq;
+			kbd_iobase = of_ioremap(&kbd->resource[0],
+						0, 8, "kbd");
+		} else if (!strcmp(dp->name, OBP_PS2MS_NAME1) ||
+			   !strcmp(dp->name, OBP_PS2MS_NAME2)) {
+			struct of_device *ms = of_find_device_by_node(dp);
+			unsigned int irq = ms->irqs[0];
+			if (irq == 0xffffffff)
+				irq = op->irqs[0];
+			i8042_aux_irq = irq;
+		}
+
+		dp = dp->sibling;
+	}
+
+	return 0;
+}
+
+static int __devexit sparc_i8042_remove(struct of_device *op)
+{
+	of_iounmap(kbd_iobase, 8);
+
+	return 0;
+}
+
+static struct of_device_id sparc_i8042_match[] = {
+	{
+		.name = "8042",
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, i8042_match);
+
+static struct of_platform_driver sparc_i8042_driver = {
+	.name		= "i8042",
+	.match_table	= sparc_i8042_match,
+	.probe		= sparc_i8042_probe,
+	.remove		= __devexit_p(sparc_i8042_remove),
+};
+
 static int __init i8042_platform_init(void)
 {
 #ifndef CONFIG_PCI
 	return -ENODEV;
 #else
-	char prop[128];
-	int len;
+	struct device_node *root = of_find_node_by_path("/");
 
-	len = prom_getproperty(prom_root_node, "name", prop, sizeof(prop));
-	if (len < 0) {
-		printk("i8042: Cannot get name property of root OBP node.\n");
-		return -ENODEV;
-	}
-	if (strncmp(prop, "SUNW,JavaStation-1", len) == 0) {
+	if (!strcmp(root->name, "SUNW,JavaStation-1")) {
 		/* Hardcoded values for MrCoffee.  */
 		i8042_kbd_irq = i8042_aux_irq = 13 | 0x20;
 		kbd_iobase = ioremap(0x71300060, 8);
 		if (!kbd_iobase)
 			return -ENODEV;
 	} else {
-		struct linux_ebus *ebus;
-		struct linux_ebus_device *edev;
-		struct linux_ebus_child *child;
+		int err = of_register_driver(&sparc_i8042_driver,
+					     &of_bus_type);
+		if (err)
+			return err;
 
-		for_each_ebus(ebus) {
-			for_each_ebusdev(edev, ebus) {
-				if (!strcmp(edev->prom_node->name, "8042"))
-					goto edev_found;
-			}
-		}
-		return -ENODEV;
-
-	edev_found:
-		for_each_edevchild(edev, child) {
-			if (!strcmp(child->prom_node->name, OBP_PS2KBD_NAME1) ||
-			    !strcmp(child->prom_node->name, OBP_PS2KBD_NAME2)) {
-				i8042_kbd_irq = child->irqs[0];
-				kbd_iobase =
-					ioremap(child->resource[0].start, 8);
-			}
-			if (!strcmp(child->prom_node->name, OBP_PS2MS_NAME1) ||
-			    !strcmp(child->prom_node->name, OBP_PS2MS_NAME2))
-				i8042_aux_irq = child->irqs[0];
-		}
 		if (i8042_kbd_irq == -1 ||
 		    i8042_aux_irq == -1) {
-			printk("i8042: Error, 8042 device lacks both kbd and "
-			       "mouse nodes.\n");
+			if (kbd_iobase) {
+				of_iounmap(kbd_iobase, 8);
+				kbd_iobase = (void __iomem *) NULL;
+			}
 			return -ENODEV;
 		}
 	}
@@ -109,7 +136,10 @@ static int __init i8042_platform_init(void)
 static inline void i8042_platform_exit(void)
 {
 #ifdef CONFIG_PCI
-	iounmap(kbd_iobase);
+	struct device_node *root = of_find_node_by_path("/");
+
+	if (strcmp(root->name, "SUNW,JavaStation-1"))
+		of_unregister_driver(&sparc_i8042_driver);
 #endif
 }