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

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Message-ID: <217c843d-3b8a-4d6e-9e19-3fb22f099fc5@gmx.de>
Date: Thu, 21 Nov 2024 23:12:50 +0100
From: Armin Wolf <W_Armin@....de>
To: Mario Limonciello <mario.limonciello@....com>,
 Hans de Goede <hdegoede@...hat.com>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: "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

Am 19.11.24 um 18:17 schrieb Mario Limonciello:

> The `choices` file will show all possible choices that a given platform
> profile handler can support.

Reviewed-by: Armin Wolf <W_Armin@....de>

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