On Friday, October 30, 2015 09:17:41 PM Linus Walleij wrote: > On Fri, Oct 30, 2015 at 11:02 AM, Mika Westerberg > <mika.westerberg@xxxxxxxxxxxxxxx> wrote: > > > In Microsoft Surface3 the GPIO detecting lid state is shared between GPIO > > event and operation region. Below is simplied version of the DSDT from > > Surface3 including relevant parts: > (...) > > To be able to go through acpi_gpio->events list for operation region access > > we need to make sure the list is properly initialized whenever GPIO chip is > > registered. > > > > Link: https://bugzilla.kernel.org/show_bug.cgi?id=106571 > > Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> > > I wonder what an operation region is, maybe it's something you can eat. That's a way for AML to access things. Basically, if it wants to access a resource, it has to declare "I will be using X bytes at location Y in address space Z" and the OS is supposed to provide a handler for that. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
