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 is a separate controller from which can watch almost all pads 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 router with filtering block to select edge or level input and the polarity of the signal. As there we can't setup the filtring to generate a signal on both the high and low polarity, there is no easy way to support IRQ_TYPE_EDGE_BOTH at the moment The number of interrupt line routed to the controller depends on the SoC, and essentially the number of GPIO available on the SoC. This series has been tested on Amlogic S905-P200 board with the front panel power button. 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. Changes since v2: [4] * Address Marc's comment on the irqchip driver from v2 * Drop all gpio subsystem related patches. Discussion regarding the issue faced will be initiated. [1] : https://lkml.kernel.org/r/1448987062-31225-1-git-send-email-carlo@xxxxxxxxxx [2] : https://lkml.kernel.org/r/1475593708-10526-1-git-send-email-jbrunet@xxxxxxxxxxxx [3] : https://lkml.kernel.org/r/1476871709-8359-1-git-send-email-jbrunet@xxxxxxxxxxxx [4] : https://lkml.kernel.org/r/1476890480-8884-1-git-send-email-jbrunet@xxxxxxxxxxxx Jerome Brunet (6): dt-bindings: interrupt-controller: add DT binding for meson GPIO interrupt controller irqchip: meson: add support for gpio interrupt controller ARM: meson: enable MESON_IRQ_GPIO in Kconfig for meson8b ARM64: meson: enable MESON_IRQ_GPIO in Kconfig ARM: dts: meson8b: enable gpio interrupt controller ARM64: dts: meson-gx: add gpio interrupt controller .../amlogic,meson-gpio-intc.txt | 35 ++ arch/arm/boot/dts/meson.dtsi | 9 + arch/arm/boot/dts/meson8b.dtsi | 6 + arch/arm/mach-meson/Kconfig | 1 + arch/arm64/Kconfig.platforms | 1 + arch/arm64/boot/dts/amlogic/meson-gx.dtsi | 9 + arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 6 + arch/arm64/boot/dts/amlogic/meson-gxl.dtsi | 6 + drivers/irqchip/Kconfig | 8 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-meson-gpio.c | 407 +++++++++++++++++++++ 11 files changed, 489 insertions(+) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.txt create mode 100644 drivers/irqchip/irq-meson-gpio.c -- 2.9.4 -- 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
