linux-kernel - Re: [PATCH] hwmon: Convert to using %pOFn instead of device

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Date:   Tue, 28 Aug 2018 06:57:02 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Rob Herring <robh@...nel.org>, linux-kernel@...r.kernel.org
Cc:     Jean Delvare <jdelvare@...e.com>, linux-hwmon@...r.kernel.org
Subject: Re: [PATCH] hwmon: Convert to using %pOFn instead of device_node.name

On 08/27/2018 06:52 PM, Rob Herring wrote:
> In preparation to remove the node name pointer from struct device_node,
> convert printf users to use the %pOFn format specifier.
> 
> Cc: Jean Delvare <jdelvare@...e.com>
> Cc: Guenter Roeck <linux@...ck-us.net>
> Cc: linux-hwmon@...r.kernel.org
> Signed-off-by: Rob Herring <robh@...nel.org>

The devm_kstrdup((..., "iio_hwmon") is getting a bit ridiculous and is asking
for a rewrite, but that can be done in a separate patch.

Other than that, do you want this taken through hwmon or as a series on its own ?

For the latter case,

Acked-by: Guenter Roeck <linux@...ck-us.net>

otherwise please let me know.

Guenter

> ---
>   drivers/hwmon/aspeed-pwm-tacho.c | 2 +-
>   drivers/hwmon/ibmpowernv.c       | 4 ++--
>   drivers/hwmon/iio_hwmon.c        | 9 ++++-----
>   drivers/hwmon/npcm750-pwm-fan.c  | 2 +-
>   4 files changed, 8 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/hwmon/aspeed-pwm-tacho.c b/drivers/hwmon/aspeed-pwm-tacho.c
> index 5e449eac788a..92de8139d398 100644
> --- a/drivers/hwmon/aspeed-pwm-tacho.c
> +++ b/drivers/hwmon/aspeed-pwm-tacho.c
> @@ -852,7 +852,7 @@ static int aspeed_create_pwm_cooling(struct device *dev,
>   		dev_err(dev, "Property 'cooling-levels' cannot be read.\n");
>   		return ret;
>   	}
> -	snprintf(cdev->name, MAX_CDEV_NAME_LEN, "%s%d", child->name, pwm_port);
> +	snprintf(cdev->name, MAX_CDEV_NAME_LEN, "%pOFn%d", child, pwm_port);
>   
>   	cdev->tcdev = thermal_of_cooling_device_register(child,
>   							 cdev->name,
> diff --git a/drivers/hwmon/ibmpowernv.c b/drivers/hwmon/ibmpowernv.c
> index 83472808c816..4935897f1527 100644
> --- a/drivers/hwmon/ibmpowernv.c
> +++ b/drivers/hwmon/ibmpowernv.c
> @@ -603,8 +603,8 @@ static int create_device_attrs(struct platform_device *pdev)
>   		if (of_property_read_u32(np, "sensor-id", &sensor_id) &&
>   		    of_property_read_u32(np, "sensor-data", &sensor_id)) {
>   			dev_info(&pdev->dev,
> -				 "'sensor-id' missing in the node '%s'\n",
> -				 np->name);
> +				 "'sensor-id' missing in the node '%pOFn'\n",
> +				 np);
>   			continue;
>   		}
>   
> diff --git a/drivers/hwmon/iio_hwmon.c b/drivers/hwmon/iio_hwmon.c
> index 2f3f875c06ac..7566991f1c04 100644
> --- a/drivers/hwmon/iio_hwmon.c
> +++ b/drivers/hwmon/iio_hwmon.c
> @@ -65,13 +65,9 @@ static int iio_hwmon_probe(struct platform_device *pdev)
>   	int in_i = 1, temp_i = 1, curr_i = 1, humidity_i = 1;
>   	enum iio_chan_type type;
>   	struct iio_channel *channels;
> -	const char *name = "iio_hwmon";
>   	struct device *hwmon_dev;
>   	char *sname;
>   
> -	if (dev->of_node && dev->of_node->name)
> -		name = dev->of_node->name;
> -
>   	channels = devm_iio_channel_get_all(dev);
>   	if (IS_ERR(channels)) {
>   		if (PTR_ERR(channels) == -ENODEV)
> @@ -141,7 +137,10 @@ static int iio_hwmon_probe(struct platform_device *pdev)
>   	st->attr_group.attrs = st->attrs;
>   	st->groups[0] = &st->attr_group;
>   
> -	sname = devm_kstrdup(dev, name, GFP_KERNEL);
> +	if (dev->of_node)
> +		sname = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", dev->of_node);
> +	else
> +		sname = devm_kstrdup(dev, "iio_hwmon", GFP_KERNEL);
>   	if (!sname)
>   		return -ENOMEM;
>   
> diff --git a/drivers/hwmon/npcm750-pwm-fan.c b/drivers/hwmon/npcm750-pwm-fan.c
> index 8474d601aa63..96634fd54e0b 100644
> --- a/drivers/hwmon/npcm750-pwm-fan.c
> +++ b/drivers/hwmon/npcm750-pwm-fan.c
> @@ -861,7 +861,7 @@ static int npcm7xx_create_pwm_cooling(struct device *dev,
>   		dev_err(dev, "Property 'cooling-levels' cannot be read.\n");
>   		return ret;
>   	}
> -	snprintf(cdev->name, THERMAL_NAME_LENGTH, "%s%d", child->name,
> +	snprintf(cdev->name, THERMAL_NAME_LENGTH, "%pOFn%d", child,
>   		 pwm_port);
>   
>   	cdev->tcdev = thermal_of_cooling_device_register(child,
>