Re: [PATCH v2 1/2] gpio / CrystalCove: support virtual GPIO

From: Aaron Lu
Date: Fri Sep 26 2014 - 01:22:49 EST

On 09/25/2014 09:16 PM, Linus Walleij wrote:
> On Thu, Sep 25, 2014 at 4:57 AM, Aaron Lu <> 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.
>> Signed-off-by: Aaron Lu <>
>> ---
>> v2: remove the hunk to increase NR_GPIO to 512.
> Patch applied with Mika's ACK, also renumbered 0x5e to 94.

Thanks for taking care of this.


> Yours,
> Linus Walleij

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