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Meson8 uses the same GPIO interrupt controller IP block as the other Meson SoCs. A total of 134 pins can be spied on, which is the sum of: - 22 pins on bank GPIOX - 17 pins on bank GPIOY - 30 pins on bank GPIODV - 10 pins on bank GPIOH - 15 pins on bank GPIOZ - 7 pins on bank CARD - 19 pins on bank BOOT - 14 pins in the AO domain Acked-by: Kevin Hilman <khilman@baylibre.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
37 lines
1.6 KiB
Plaintext
37 lines
1.6 KiB
Plaintext
Amlogic meson GPIO interrupt controller
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Meson SoCs contains an interrupt controller which is able to watch the SoC
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pads and generate an interrupt on edge or level. The controller is essentially
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a 256 pads to 8 GIC interrupt multiplexer, with a filter block to select edge
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or level and polarity. It does not expose all 256 mux inputs because the
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documentation shows that the upper part is not mapped to any pad. The actual
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number of interrupt exposed depends on the SoC.
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Required properties:
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- compatible : must have "amlogic,meson8-gpio-intc” and either
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“amlogic,meson8-gpio-intc” for meson8 SoCs (S802) or
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“amlogic,meson8b-gpio-intc” for meson8b SoCs (S805) or
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“amlogic,meson-gxbb-gpio-intc” for GXBB SoCs (S905) or
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“amlogic,meson-gxl-gpio-intc” for GXL SoCs (S905X, S912)
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- interrupt-parent : a phandle to the GIC the interrupts are routed to.
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Usually this is provided at the root level of the device tree as it is
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common to most of the SoC.
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- reg : Specifies base physical address and size of the registers.
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- interrupt-controller : Identifies the node as an interrupt controller.
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- #interrupt-cells : Specifies the number of cells needed to encode an
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interrupt source. The value must be 2.
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- meson,channel-interrupts: Array with the 8 upstream hwirq numbers. These
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are the hwirqs used on the parent interrupt controller.
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Example:
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gpio_interrupt: interrupt-controller@9880 {
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compatible = "amlogic,meson-gxbb-gpio-intc",
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"amlogic,meson-gpio-intc";
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reg = <0x0 0x9880 0x0 0x10>;
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interrupt-controller;
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#interrupt-cells = <2>;
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meson,channel-interrupts = <64 65 66 67 68 69 70 71>;
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};
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