This patch series adds support for the GPIO interrupt controller found on Amlogic's meson SoC families. Unlike what the name suggests, this controller is not part of the SoC GPIO subsystem. It's an indepedent controller which can watch almost all pad of the SoC and generate and interrupt from it. Some pins, which are not part of the public datasheet, don't seem to have this capability though. Hardware wise, the controller is a 256 to 8 multiplexer. It can take up to 256 input pads and route them to any of 8 GIC's interrupts. There is also a filter block in the middle to select the appropriate edge or level. The number of interrupt declared by the irqchip is lowered from 256 to the actual number of signal routed to the controller on each SoC family. As we have access to only 8 GIC’s interrupts, these are allocated when an interrupt is requested from the controller, on a first come, first served basis. This series has been tested on Amlogic S905-P200 board with the front panel power button. Directly passing an IRQ or using gpio_to_irq both work with this driver. This work is derived from the previous work of Carlo Caione [1]. Changes since RFC : [2] * Remove interrupt property in device tree: the controller cannot generate interrupts on its own and is merely routing the interrupt to the GIC, therefore it should not use the interrupt property. This data is now stored directly in the driver, same as the pinctrl data. * Improve compatibility checking of meson pinctrl on its interrupt parent to activate gpio_to_irq callback * Drop IRQ_BOTH hack. Need more work to have an acceptable solution for this Changes since v1 : [3] * Correct mistake in patch 4 when no compatible controller is found. Sorry for the inconvenience. [1] : http://lkml.kernel.org/r/1448987062-31225-1-git-send-email-carlo@xxxxxxxxxx [2] : http://lkml.kernel.org/r/1475593708-10526-1-git-send-email-jbrunet@xxxxxxxxxxxx [3] : http://lkml.kernel.org/r/1476871709-8359-1-git-send-email-jbrunet@xxxxxxxxxxxx Jerome Brunet (9): irqchip: meson: add support for gpio interrupt controller dt-bindings: interrupt-controller: add DT binding for meson GPIO interrupt controller pinctrl: meson: update pinctrl data with gpio irq data pinctrl: meson: allow gpio to request irq dt-bindings: pinctrl: meson: update gpio dt-bindings ARM64: meson: enable MESON_IRQ_GPIO in Kconfig ARM: meson: enable MESON_IRQ_GPIO in Kconfig for meson8 ARM64: dts: amlogic: enable gpio interrupt controller on gxbb ARM: dts: amlogic: enable gpio interrupt controller on meson8 .../amlogic,meson-gpio-intc.txt | 31 ++ .../devicetree/bindings/pinctrl/meson,pinctrl.txt | 4 + arch/arm/boot/dts/meson8.dtsi | 11 + arch/arm/boot/dts/meson8b.dtsi | 11 + arch/arm/mach-meson/Kconfig | 2 + arch/arm64/Kconfig.platforms | 1 + arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 9 + drivers/irqchip/Kconfig | 9 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-meson-gpio.c | 423 +++++++++++++++++++++ drivers/pinctrl/Kconfig | 2 + drivers/pinctrl/meson/pinctrl-meson-gxbb.c | 24 +- drivers/pinctrl/meson/pinctrl-meson.c | 77 +++- drivers/pinctrl/meson/pinctrl-meson.h | 17 +- drivers/pinctrl/meson/pinctrl-meson8.c | 22 +- drivers/pinctrl/meson/pinctrl-meson8b.c | 34 +- 16 files changed, 641 insertions(+), 37 deletions(-) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.txt create mode 100644 drivers/irqchip/irq-meson-gpio.c -- 2.7.4 -- 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
