linux-kernel - [PATCH] Input: i8042 - Rework DT node name comparisons

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Message-Id: <20181205195050.4759-10-robh@kernel.org>
Date:   Wed,  5 Dec 2018 13:50:26 -0600
From:   Rob Herring <robh@...nel.org>
To:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] Input: i8042 - Rework DT node name comparisons

Signed-off-by: Rob Herring <robh@...nel.org>
---
 drivers/input/serio/i8042-sparcio.h | 21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/drivers/input/serio/i8042-sparcio.h b/drivers/input/serio/i8042-sparcio.h
index 796289846204..fce76812843b 100644
--- a/drivers/input/serio/i8042-sparcio.h
+++ b/drivers/input/serio/i8042-sparcio.h
@@ -53,12 +53,11 @@ static struct resource *kbd_res;
 
 static int sparc_i8042_probe(struct platform_device *op)
 {
-	struct device_node *dp = op->dev.of_node;
+	struct device_node *dp;
 
-	dp = dp->child;
-	while (dp) {
-		if (!strcmp(dp->name, OBP_PS2KBD_NAME1) ||
-		    !strcmp(dp->name, OBP_PS2KBD_NAME2)) {
+	for_each_child_of_node(op->dev.of_node, dp) {
+		if (of_node_name_eq(dp, OBP_PS2KBD_NAME1) ||
+		    of_node_name_eq(dp, OBP_PS2KBD_NAME2)) {
 			struct platform_device *kbd = of_find_device_by_node(dp);
 			unsigned int irq = kbd->archdata.irqs[0];
 			if (irq == 0xffffffff)
@@ -67,16 +66,14 @@ static int sparc_i8042_probe(struct platform_device *op)
 			kbd_iobase = of_ioremap(&kbd->resource[0],
 						0, 8, "kbd");
 			kbd_res = &kbd->resource[0];
-		} else if (!strcmp(dp->name, OBP_PS2MS_NAME1) ||
-			   !strcmp(dp->name, OBP_PS2MS_NAME2)) {
+		} else if (of_node_name_eq(dp, OBP_PS2MS_NAME1) ||
+			   of_node_name_eq(dp, OBP_PS2MS_NAME2)) {
 			struct platform_device *ms = of_find_device_by_node(dp);
 			unsigned int irq = ms->archdata.irqs[0];
 			if (irq == 0xffffffff)
 				irq = op->archdata.irqs[0];
 			i8042_aux_irq = irq;
 		}
-
-		dp = dp->sibling;
 	}
 
 	return 0;
@@ -109,8 +106,9 @@ static struct platform_driver sparc_i8042_driver = {
 static int __init i8042_platform_init(void)
 {
 	struct device_node *root = of_find_node_by_path("/");
+	const char *name = of_get_property(root, "name", NULL);
 
-	if (!strcmp(root->name, "SUNW,JavaStation-1")) {
+	if (name && !strcmp(name, "SUNW,JavaStation-1")) {
 		/* Hardcoded values for MrCoffee.  */
 		i8042_kbd_irq = i8042_aux_irq = 13 | 0x20;
 		kbd_iobase = ioremap(0x71300060, 8);
@@ -139,8 +137,9 @@ static int __init i8042_platform_init(void)
 static inline void i8042_platform_exit(void)
 {
 	struct device_node *root = of_find_node_by_path("/");
+	const char *name = of_get_property(root, "name", NULL);
 
-	if (strcmp(root->name, "SUNW,JavaStation-1"))
+	if (!name || strcmp(name, "SUNW,JavaStation-1"))
 		platform_driver_unregister(&sparc_i8042_driver);
 }
 
-- 
2.19.1