Messages in this thread | | | Date | Tue, 4 Nov 2014 11:18:07 +0100 | Subject | Re: [PATCH v2 1/2] gpio / ACPI: Add knowledge about pin controllers to acpi_get_gpiod() | From | Linus Walleij <> |
| |
On Mon, Nov 3, 2014 at 12:01 PM, Mika Westerberg <mika.westerberg@linux.intel.com> wrote:
> The GPIO resources (GpioIo/GpioInt) used in ACPI contain a GPIO number > which is relative to the hardware GPIO controller. Typically this number > can be translated directly to Linux GPIO number because the mapping is > pretty much 1:1. > > However, when the GPIO driver is using pins exported by a pin controller > driver via set of GPIO ranges, the mapping might not be 1:1 anymore and > direct translation does not work. > > In such cases we need to translate the ACPI GPIO number to be suitable for > the GPIO controller driver in question by checking all the pin controller > GPIO ranges under the given device and using those to get the proper GPIO > number. > > Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> > Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Sweet, patch applied.
Yours, Linus Walleij
| |