linux-kernel - Re: [PATCH 18/18] ACPI: platform

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Message-ID: <a81ef96a-e436-44ef-9ae1-e19d55c57438@amd.com>
Date: Thu, 9 Jan 2025 10:39:40 -0600
From: Mario Limonciello <mario.limonciello@....com>
To: Kurt Borja <kuurtb@...il.com>, platform-driver-x86@...r.kernel.org
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>,
 linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
 Armin Wolf <W_Armin@....de>, Joshua Grisham <josh@...huagrisham.com>,
 "Derek J . Clark" <derekjohn.clark@...il.com>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
 Hans de Goede <hdegoede@...hat.com>, 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>, Lyndon Sanche <lsanche@...deno.ca>,
 Ike Panhc <ike.pan@...onical.com>,
 Henrique de Moraes Holschuh <hmh@....eng.br>,
 Mark Pearson <mpearson-lenovo@...ebb.ca>,
 Colin Ian King <colin.i.king@...il.com>,
 Alexis Belmonte <alexbelm48@...il.com>, Ai Chao <aichao@...inos.cn>,
 Uwe Kleine-König <u.kleine-koenig@...libre.com>,
 Gergo Koteles <soyer@....hu>, Dell.Client.Kernel@...l.com,
 ibm-acpi-devel@...ts.sourceforge.net
Subject: Re: [PATCH 18/18] ACPI: platform_profile: Add documentation

On 1/9/2025 09:06, Kurt Borja wrote:
> Add kerneldoc and sysfs class documentation.
> 
> Signed-off-by: Kurt Borja <kuurtb@...il.com>
> ---
>   .../ABI/testing/sysfs-class-platform-profile  | 44 +++++++++++++++++++
>   drivers/acpi/platform_profile.c               | 33 ++++++++++++++
>   2 files changed, 77 insertions(+)
>   create mode 100644 Documentation/ABI/testing/sysfs-class-platform-profile
> 
> diff --git a/Documentation/ABI/testing/sysfs-class-platform-profile b/Documentation/ABI/testing/sysfs-class-platform-profile
> new file mode 100644
> index 000000000000..59486dc4313f
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-class-platform-profile
> @@ -0,0 +1,44 @@
> +What:		/sys/class/platform-profile/platform-profile-X/name
> +Date:		January 2025
> +Description:	Name of the class device given by the driver.
> +
> +		RO
> +
> +What:		/sys/class/platform-profile/platform-profile-X/choices
> +Date:		January 2025
> +Description:	This file contains a space-separated list of profiles supported for this device.
> +
> +		Drivers must use the following standard profile-names:
> +
> +		====================	========================================
> +		low-power		Low power consumption
> +		cool			Cooler operation
> +		quiet			Quieter operation
> +		balanced		Balance between low power consumption
> +					and performance
> +		balanced-performance	Balance between performance and low
> +					power consumption with a slight bias
> +					towards performance
> +		performance		High performance operation
> +		custom			Driver defined custom profile
> +		====================	========================================
> +
> +		RO
> +
> +What:		/sys/class/platform-profile/platform-profile-X/profile
> +Date:		January 2025
> +Description:	Reading this file gives the current selected profile for this
> +		device. Writing this file with one of the strings from
> +		platform_profile_choices changes the profile to the new value.
> +
> +		This file can be monitored for changes by polling for POLLPRI,
> +		POLLPRI will be signalled on any changes, independent of those
signaled
> +		changes coming from a userspace write; or coming from another
> +		source such as e.g. a hotkey triggered profile change handled
> +		either directly by the embedded-controller or fully handled
> +		inside the kernel.
> +
> +		This file may also emit the string 'custom' to indicate
> +		that the driver is using a driver defined custom profile.
> +
> +		RW
> diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
> index 8c79ecab8a6d..5d74675c5419 100644
> --- a/drivers/acpi/platform_profile.c
> +++ b/drivers/acpi/platform_profile.c
> @@ -426,6 +426,10 @@ static const struct attribute_group platform_profile_group = {
>   	.is_visible = profile_class_is_visible,
>   };
>   
> +/**
> + * platform_profile_notify - Notify class device and legacy sysfs interface
> + * @dev: The class device
> + */
>   void platform_profile_notify(struct device *dev)
>   {
>   	scoped_cond_guard(mutex_intr, return, &profile_lock) {
> @@ -435,6 +439,11 @@ void platform_profile_notify(struct device *dev)
>   }
>   EXPORT_SYMBOL_GPL(platform_profile_notify);
>   
> +/**
> + * platform_profile_cycle - Cycles profiles available on all registered class devices
> + *
> + * Return: 0 on success, -errno on failure
> + */
>   int platform_profile_cycle(void)
>   {
>   	enum platform_profile_option next = PLATFORM_PROFILE_LAST;
> @@ -478,6 +487,15 @@ int platform_profile_cycle(void)
>   }
>   EXPORT_SYMBOL_GPL(platform_profile_cycle);
>   
> +/**
> + * platform_profile_register - Creates and registers a platform profile class device
> + * @dev: Parent device
> + * @name: Name of the class device
> + * @drvdata: Driver data that will be attached to the class device
> + * @ops: Platform profile's mandatory operations
> + *
> + * Return: pointer to the new class device on success, ERR_PTR on failure
> + */
>   struct device *platform_profile_register(struct device *dev, const char *name,
>   					 void *drvdata,
>   					 const struct platform_profile_ops *ops)
> @@ -548,6 +566,12 @@ struct device *platform_profile_register(struct device *dev, const char *name,
>   }
>   EXPORT_SYMBOL_GPL(platform_profile_register);
>   
> +/**
> + * platform_profile_remove - Unregisters a platform profile class device
> + * @dev: Class device
> + *
> + * Return: 0
> + */
>   int platform_profile_remove(struct device *dev)
>   {
>   	struct platform_profile_handler *pprof = to_pprof_handler(dev);
> @@ -573,6 +597,15 @@ static void devm_platform_profile_release(struct device *dev, void *res)
>   	platform_profile_remove(*ppdev);
>   }
>   
> +/**
> + * devm_platform_profile_register - Device managed version of platform_profile_register
> + * @dev: Parent device
> + * @name: Name of the class device
> + * @drvdata: Driver data that will be attached to the class device
> + * @ops: Platform profile's mandatory operations
> + *
> + * Return: pointer to the new class device on success, ERR_PTR on failure
> + */
>   struct device *devm_platform_profile_register(struct device *dev, const char *name,
>   					      void *drvdata,
>   					      const struct platform_profile_ops *ops)