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

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Date:   Sun, 17 Feb 2019 23:23:25 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Rob Herring <robh@...nel.org>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-input@...r.kernel.org
Subject: Re: [PATCH] Input: i8042 - Rework DT node name comparisons

On Wed, Feb 13, 2019 at 10:16:31AM -0600, Rob Herring wrote:
> Convert string compares of DT node names to use of_node_name_eq helper
> instead. For the root node on SUN DT, we need to retrieve the 'name'
> property as it is the rare case where the 'name' property and node name
> differ. With both changes, it removes direct access to the node name
> pointer.
> 
> While at it, comvert the open coded loop to use
> for_each_child_of_node().
> 
> Cc: Dmitry Torokhov <dmitry.torokhov@...il.com>
> Cc: linux-input@...r.kernel.org
> Signed-off-by: Rob Herring <robh@...nel.org>

Applied, thank you.

> ---
>  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
> 

-- 
Dmitry