On Mon, Apr 13, 2020 at 3:46 PM Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx> 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. So how exactly are they exported? > 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. My understanding based on a cursory look at the patch is that there is an ACPI device with _HID equal to "GGL0001" and one or more special methods under it that return values which you want to export over sysfs as binary attributes. They appear to be read-only. I guess that these data are to be consubed by user space?
