linux-kernel - Re: [PATCH v7 12/22] ACPI: platform_profile: Add choices attribute for class interface

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Message-ID: <82d5282a-08f5-6986-3dfc-489f62b7c456@linux.intel.com>
Date: Wed, 20 Nov 2024 16:47:16 +0200 (EET)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Mario Limonciello <mario.limonciello@....com>
cc: Hans de Goede <hdegoede@...hat.com>, 
    "Rafael J . Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>, 
    Maximilian Luz <luzmaximilian@...il.com>, Lee Chun-Yi <jlee@...e.com>, 
    Shyam Sundar S K <Shyam-sundar.S-k@....com>, 
    Corentin Chary <corentin.chary@...il.com>, 
    "Luke D . Jones" <luke@...nes.dev>, Ike Panhc <ike.pan@...onical.com>, 
    Henrique de Moraes Holschuh <hmh@....eng.br>, 
    Alexis Belmonte <alexbelm48@...il.com>, 
    Uwe Kleine-König <u.kleine-koenig@...gutronix.de>, 
    Ai Chao <aichao@...inos.cn>, Gergo Koteles <soyer@....hu>, 
    open list <linux-kernel@...r.kernel.org>, 
    "open list:ACPI" <linux-acpi@...r.kernel.org>, 
    "open list:MICROSOFT SURFACE PLATFORM PROFILE DRIVER" <platform-driver-x86@...r.kernel.org>, 
    "open list:THINKPAD ACPI EXTRAS DRIVER" <ibm-acpi-devel@...ts.sourceforge.net>, 
    Mark Pearson <mpearson-lenovo@...ebb.ca>, 
    Matthew Schwartz <matthew.schwartz@...ux.dev>
Subject: Re: [PATCH v7 12/22] ACPI: platform_profile: Add choices attribute
 for class interface

On Tue, 19 Nov 2024, Mario Limonciello wrote:

> The `choices` file will show all possible choices that a given platform
> profile handler can support.
> 
> Tested-by: Mark Pearson <mpearson-lenovo@...ebb.ca>
> Signed-off-by: Mario Limonciello <mario.limonciello@....com>
> ---
> v7:
>  * Drop locking
> v5:
>  * Fix kdoc
>  * Add tag
>  * Fix whitespace
>  * Adjust mutex use
> ---
>  drivers/acpi/platform_profile.c | 39 +++++++++++++++++++++++++++++++++
>  1 file changed, 39 insertions(+)
> 
> diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
> index a9d7ec3c85844..9d6ead043994c 100644
> --- a/drivers/acpi/platform_profile.c
> +++ b/drivers/acpi/platform_profile.c
> @@ -25,6 +25,27 @@ static_assert(ARRAY_SIZE(profile_names) == PLATFORM_PROFILE_LAST);
>  
>  static DEFINE_IDA(platform_profile_ida);
>  
> +/**
> + * _commmon_choices_show - Show the available profile choices
> + * @choices: The available profile choices
> + * @buf: The buffer to write to

Add empty line.

> + * Return: The number of bytes written
> + */

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>

--
 i.


> +static ssize_t _commmon_choices_show(unsigned long *choices, char *buf)
> +{
> +	int i, len = 0;
> +
> +	for_each_set_bit(i, choices, PLATFORM_PROFILE_LAST) {
> +		if (len == 0)
> +			len += sysfs_emit_at(buf, len, "%s", profile_names[i]);
> +		else
> +			len += sysfs_emit_at(buf, len, " %s", profile_names[i]);
> +	}
> +	len += sysfs_emit_at(buf, len, "\n");
> +
> +	return len;
> +}
> +
>  /**
>   * name_show - Show the name of the profile handler
>   * @dev: The device
> @@ -41,9 +62,27 @@ static ssize_t name_show(struct device *dev,
>  	return sysfs_emit(buf, "%s\n", handler->name);
>  }
>  
> +/**
> + * choices_show - Show the available profile choices
> + * @dev: The device
> + * @attr: The attribute
> + * @buf: The buffer to write to
> + */
> +static ssize_t choices_show(struct device *dev,
> +			    struct device_attribute *attr,
> +			    char *buf)
> +{
> +	struct platform_profile_handler *handler = dev_get_drvdata(dev);
> +
> +	return _commmon_choices_show(handler->choices, buf);
> +}
> +
>  static DEVICE_ATTR_RO(name);
> +static DEVICE_ATTR_RO(choices);
> +
>  static struct attribute *profile_attrs[] = {
>  	&dev_attr_name.attr,
> +	&dev_attr_choices.attr,
>  	NULL
>  };
>  ATTRIBUTE_GROUPS(profile);
>