This patch series is partially based on a series Jerome Brunet submitted about half a year ago. Due to open questions this series never made it to mainline, see https://patchwork.kernel.org/patch/9384431/ This new attempt uses GPIOLIB_IRQCHIP resulting in less needed code. Included is also support for using two parent IRQs in case of IRQ_TYPE_EDGE_BOTH, like in the vendor driver. Worth to be mentioned is also that I had to work around a strange issue with spurious interrupts resulting in a deadlock. The affected critical section in __setup_irq is executed with interrupts disabled, nevertheless spurious GPIO IRQs result in a deadlock what seems to indicate that they are handled on the same CPU. I didn't find a better explanation than a possible HW flaw so far. The series was successfully tested on a Odroid-C2, e.g. with removing polling for SD card insertion/removal from the mmc driver. Changes in v2: - separate the GPIO IRQ controller from the pinctrl driver - minor improvements to the GPIO IRQ controller Heiner Kallweit (5): pinctrl: meson: add interrupts to pinctrl data pinctrl: meson: document GPIO IRQ DT binding pinctrl: meson: add DT node for GPIO IRQ on Meson GX pinctrl: meson: add DT node for GPIO IRQ on Meson 8 / 8b pinctrl: meson: improve meson_get_bank and export it pinctrl: meson: add support for GPIO interrupts .../bindings/gpio/amlogic,meson-gpio-interrupt.txt | 30 ++ arch/arm/boot/dts/meson8.dtsi | 13 + arch/arm/boot/dts/meson8b.dtsi | 13 + arch/arm64/boot/dts/amlogic/meson-gx.dtsi | 13 + drivers/pinctrl/Kconfig | 1 + drivers/pinctrl/meson/Makefile | 2 +- drivers/pinctrl/meson/pinctrl-meson-gxbb.c | 22 +- drivers/pinctrl/meson/pinctrl-meson-gxl.c | 20 +- drivers/pinctrl/meson/pinctrl-meson-irq.c | 367 +++++++++++++++++++++ drivers/pinctrl/meson/pinctrl-meson.c | 67 ++-- drivers/pinctrl/meson/pinctrl-meson.h | 19 +- drivers/pinctrl/meson/pinctrl-meson8.c | 20 +- drivers/pinctrl/meson/pinctrl-meson8b.c | 32 +- 13 files changed, 538 insertions(+), 81 deletions(-) create mode 100644 Documentation/devicetree/bindings/gpio/amlogic,meson-gpio-interrupt.txt create mode 100644 drivers/pinctrl/meson/pinctrl-meson-irq.c -- 2.12.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
