Hi, This series tries to add what is missing in current Linux ACPI GPIO support. There are two new features that were introduced with ACPI 5.0:
* ACPI GPIO signaled events * ACPI GPIO operation regions The current ACPI GPIO support code already added preliminary support for GPIO signaled events but at the time we didn't have real hardware with real GPIO triggered events so it was never properly tested. Now there are devices like Asus T100TA transformer that uses these events so we were able to see that the ASL code is being executed when a GPIO interrupt is triggered. Patches [3,4/6] Rework the ACPI GPIO signaled event support. Support for GPIO operation regions is a new thing (well, kind of, it was tried already once [1] but never got further from that). The idea here is that the ASL code can toggle GPIOs via help of ACPI enabled Linux GPIO driver. Implementation is in Patch [6/6]. These patches are based on two patches from Alexandre Courbot [2] which introduce gpiochip_get_desc() function. [1] http://www.spinics.net/lists/linux-acpi/msg46230.html [2] https://lkml.org/lkml/2014/2/9/24 Mika Westerberg (6): gpiolib: Allow GPIO chips to request their own GPIOs gpio / ACPI: Allocate ACPI specific data directly in acpi_gpiochip_add() gpio / ACPI: Rename acpi_gpio_evt_pin to acpi_gpio_event gpio / ACPI: Embed events list directly into struct acpi_gpio_chip gpio / ACPI: Rework ACPI GPIO event handling gpio / ACPI: Add support for ACPI GPIO operation regions drivers/gpio/gpiolib-acpi.c | 465 ++++++++++++++++++++++++++++++++------------ drivers/gpio/gpiolib.c | 60 +++++- drivers/gpio/gpiolib.h | 3 + 3 files changed, 398 insertions(+), 130 deletions(-) -- 1.9.0.rc3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
