On Tue, Sep 9, 2014 at 4:32 AM, Aaron Lu <aaron.lu@xxxxxxxxx> wrote: > The virtual GPIO introduced in ACPI table of Baytrail-T based system is > used to solve a problem under Windows. We do not have such problems > under Linux so we do not actually need them. But we have to tell GPIO > library that the Crystal Cove GPIO chip has this many GPIO pins or the > common GPIO handler will refuse any access to those high number GPIO > pins, which will resulted in a failure evaluation of every ACPI control > method that is used to turn on/off power resource and/or report sensor > temperatures. > > Due to the high number of virtual GPIOs, the value of ARCH_NR_GPIOS is > bumped from 256 to 512 to avoid failures on platforms that have various > GPIO controllers. > > Signed-off-by: Aaron Lu <aaron.lu@xxxxxxxxx> I have some other patch pending increasing the default GPIO# to 512, but anyhow: this needs review from someone. Where is Lejun? Mika also reviewed last time. Someone I trust to understand ACPI need to be involved, Rafael, Darren.... Yours, Linus Walleij -- 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
