Hi-- On 3/30/20 8:06 AM, Enric Balletbo i Serra wrote: > This driver attaches to the ChromeOS ACPI device and then exports the values > reported by the ACPI in a sysfs directory. These values are not exported > via the standard ACPI tables, hence a specific driver is needed to do > it. The ACPI values are presented in the string form (numbers as decimal > values) or binary blobs, and can be accessed as the contents of the > appropriate read only files in the standard ACPI devices sysfs directory tree. > > Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx> > --- > > Thanks, > Enric > > [1] https://lkml.org/lkml/2017/7/31/378 > > Changes in v3: > - Use attribute groups instead of adding files "by hand". > - Add BUILD_TEST to increment build coverage. Where was BUILD_TEST coverage added? Is that the same as COMPILE_TEST? > - Do not use "raw" kobject to create directories. > - Do not abuse of the platform_device interface. Remove it. > > Changes in v2: > - Note that this version is a total rework, with those major changes: > - Use lists to track dinamically allocated attributes and groups. > - Use sysfs binary attributes to store the ACPI contents. > - Remove all the functionalities except the one that creates the sysfs files. > > drivers/platform/x86/Kconfig | 12 + > drivers/platform/x86/Makefile | 1 + > drivers/platform/x86/chromeos_acpi.c | 517 +++++++++++++++++++++++++++ > 3 files changed, 530 insertions(+) > create mode 100644 drivers/platform/x86/chromeos_acpi.c > > diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig > index 587403c44598..917a1c1a0758 100644 > --- a/drivers/platform/x86/Kconfig > +++ b/drivers/platform/x86/Kconfig > @@ -72,6 +72,18 @@ config ACERHDF > If you have an Acer Aspire One netbook, say Y or M > here. > > +config ACPI_CHROMEOS > + tristate "ChromeOS specific ACPI extensions" > + depends on ACPI > + depends on CHROME_PLATFORMS > + help > + This driver provides the firmware interface for the services > + exported through the ChromeOS interfaces when using ChromeOS > + ACPI firmware. > + > + If you have an ACPI-compatible Chromebook, say Y or M > + here. > + > config ALIENWARE_WMI > tristate "Alienware Special feature control" > depends on ACPI thanks. -- ~Randy
