RE: [PATCH v1 01/15] ACPI: platform_profile: Add support for notification chains

["Limonciello, Mario" <Mario.Limonciello@amd.com>]

[Public]

> -----Original Message-----
> From: S-k, Shyam-sundar <Shyam-sundar.S-k@amd.com>
> Sent: Tuesday, July 12, 2022 09:59
> To: hdegoede@redhat.com; markgross@kernel.org
> Cc: platform-driver-x86@vger.kernel.org; Patil Rajesh
> <Patil.Reddy@amd.com>; Limonciello, Mario
> <Mario.Limonciello@amd.com>; S-k, Shyam-sundar <Shyam-sundar.S-
> k@amd.com>
> Subject: [PATCH v1 01/15] ACPI: platform_profile: Add support for
> notification chains
> 
> From: Mario Limonciello <mario.limonciello@amd.com>
> 
> Allow other drivers to react to determine current active profile
> and react to platform profile changes.
> 

The original patch this came from had notification chains, but as this was
pared down to just export the get method, this commit message and title
should be updated.

> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
> Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
> ---
>  drivers/acpi/platform_profile.c  | 26 ++++++++++++++++++++++++++
>  include/linux/platform_profile.h |  1 +
>  2 files changed, 27 insertions(+)
> 
> diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
> index d418462ab791..7e12a1f30f06 100644
> --- a/drivers/acpi/platform_profile.c
> +++ b/drivers/acpi/platform_profile.c
> @@ -49,6 +49,32 @@ static ssize_t platform_profile_choices_show(struct
> device *dev,
>  	return len;
>  }
> 
> +int platform_profile_get(enum platform_profile_option *profile)
> +{
> +	int err;
> +
> +	err = mutex_lock_interruptible(&profile_lock);
> +	if (err)
> +		return err;
> +
> +	if (!cur_profile) {
> +		mutex_unlock(&profile_lock);
> +		return -ENODEV;
> +	}
> +
> +	err = cur_profile->profile_get(cur_profile, profile);
> +	mutex_unlock(&profile_lock);
> +	if (err)
> +		return err;
> +
> +	/* Check that profile is valid index */
> +	if (WARN_ON((*profile < 0) || (*profile >=
> ARRAY_SIZE(profile_names))))
> +		return -EIO;
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(platform_profile_get);
> +
>  static ssize_t platform_profile_show(struct device *dev,
>  					struct device_attribute *attr,
>  					char *buf)
> diff --git a/include/linux/platform_profile.h
> b/include/linux/platform_profile.h
> index e5cbb6841f3a..2395be670dfd 100644
> --- a/include/linux/platform_profile.h
> +++ b/include/linux/platform_profile.h
> @@ -37,5 +37,6 @@ struct platform_profile_handler {
>  int platform_profile_register(struct platform_profile_handler *pprof);
>  int platform_profile_remove(void);
>  void platform_profile_notify(void);
> +int platform_profile_get(enum platform_profile_option *profile);
> 
>  #endif  /*_PLATFORM_PROFILE_H_*/
> --
> 2.25.1