| Message ID | 20241105153316.378-21-mario.limonciello@amd.com |
|---|---|
| State | New |
| Headers | show |
| Series | Add support for binding ACPI platform profile to multiple drivers | expand |
Hi Mario, On Tue, Nov 5, 2024, at 10:33 AM, Mario Limonciello wrote: > The class interface allows changing multiple platform profiles on a system > to different values. The semantics of it are similar to the legacy > interface. > > Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> > --- > .../userspace-api/sysfs-platform_profile.rst | 28 +++++++++++++++++++ > 1 file changed, 28 insertions(+) > > diff --git a/Documentation/userspace-api/sysfs-platform_profile.rst > b/Documentation/userspace-api/sysfs-platform_profile.rst > index 4fccde2e45639..418c61b096304 100644 > --- a/Documentation/userspace-api/sysfs-platform_profile.rst > +++ b/Documentation/userspace-api/sysfs-platform_profile.rst > @@ -40,3 +40,31 @@ added. Drivers which wish to introduce new profile > names must: > 1. Explain why the existing profile names cannot be used. > 2. Add the new profile name, along with a clear description of the > expected behaviour, to the sysfs-platform_profile ABI > documentation. > + > +Multiple driver support > +======================= > +When multiple drivers on a system advertise a platform profile > handler, the > +platform profile handler core will only advertise the profiles that are > +commong between all drivers to the ``/sys/firmware/acpi`` interfaces. Typo (commong) > + > +This is to ensure there is no ambiguity on what the profile names mean > when > +all handlers don't support a profile. > + > +Individual drivers will register a 'platform_profile' class device > that has > +similar semantics as the ``/sys/firmware/acpi/platform_profile`` > interface. > + > +To discover available profiles from the class interface the user can > read the > +``choices`` attribute. > + > +If a user wants to select a profile for a specific driver, they can do > so > +by writing to the ``profile`` attribute of the driver's class device. > + > +This will allow users to set different profiles for different drivers > on the > +same system. If the selected profile by individual drivers differes the typo (differes) > +platform profile handler core will display the profile 'custom' to > indicate > +that the profiles are not the same. > + > +While the ``platform_profile`` attribute has the value ``custom``, > writing a > +common profile from ``platform_profile_choices`` to the > platform_profile > +attribute of the platform profile handler core will set the profile > for all > +drivers. > -- > 2.43.0 Thanks Mark
diff --git a/Documentation/userspace-api/sysfs-platform_profile.rst b/Documentation/userspace-api/sysfs-platform_profile.rst index 4fccde2e45639..418c61b096304 100644 --- a/Documentation/userspace-api/sysfs-platform_profile.rst +++ b/Documentation/userspace-api/sysfs-platform_profile.rst @@ -40,3 +40,31 @@ added. Drivers which wish to introduce new profile names must: 1. Explain why the existing profile names cannot be used. 2. Add the new profile name, along with a clear description of the expected behaviour, to the sysfs-platform_profile ABI documentation. + +Multiple driver support +======================= +When multiple drivers on a system advertise a platform profile handler, the +platform profile handler core will only advertise the profiles that are +commong between all drivers to the ``/sys/firmware/acpi`` interfaces. + +This is to ensure there is no ambiguity on what the profile names mean when +all handlers don't support a profile. + +Individual drivers will register a 'platform_profile' class device that has +similar semantics as the ``/sys/firmware/acpi/platform_profile`` interface. + +To discover available profiles from the class interface the user can read the +``choices`` attribute. + +If a user wants to select a profile for a specific driver, they can do so +by writing to the ``profile`` attribute of the driver's class device. + +This will allow users to set different profiles for different drivers on the +same system. If the selected profile by individual drivers differes the +platform profile handler core will display the profile 'custom' to indicate +that the profiles are not the same. + +While the ``platform_profile`` attribute has the value ``custom``, writing a +common profile from ``platform_profile_choices`` to the platform_profile +attribute of the platform profile handler core will set the profile for all +drivers.
The class interface allows changing multiple platform profiles on a system to different values. The semantics of it are similar to the legacy interface. Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> --- .../userspace-api/sysfs-platform_profile.rst | 28 +++++++++++++++++++ 1 file changed, 28 insertions(+)