| Amlogic meson GPIO interrupt controller |
| |
| Meson SoCs contains an interrupt controller which is able to watch the SoC |
| pads and generate an interrupt on edge or level. The controller is essentially |
| a 256 pads to 8 GIC interrupt multiplexer, with a filter block to select edge |
| or level and polarity. It does not expose all 256 mux inputs because the |
| documentation shows that the upper part is not mapped to any pad. The actual |
| number of interrupt exposed depends on the SoC. |
| |
| Required properties: |
| |
| - compatible : must have "amlogic,meson8-gpio-intc" and either |
| "amlogic,meson8-gpio-intc" for meson8 SoCs (S802) or |
| "amlogic,meson8b-gpio-intc" for meson8b SoCs (S805) or |
| "amlogic,meson-gxbb-gpio-intc" for GXBB SoCs (S905) or |
| "amlogic,meson-gxl-gpio-intc" for GXL SoCs (S905X, S912) |
| "amlogic,meson-axg-gpio-intc" for AXG SoCs (A113D, A113X) |
| - interrupt-parent : a phandle to the GIC the interrupts are routed to. |
| Usually this is provided at the root level of the device tree as it is |
| common to most of the SoC. |
| - reg : Specifies base physical address and size of the registers. |
| - interrupt-controller : Identifies the node as an interrupt controller. |
| - #interrupt-cells : Specifies the number of cells needed to encode an |
| interrupt source. The value must be 2. |
| - meson,channel-interrupts: Array with the 8 upstream hwirq numbers. These |
| are the hwirqs used on the parent interrupt controller. |
| |
| Example: |
| |
| gpio_interrupt: interrupt-controller@9880 { |
| compatible = "amlogic,meson-gxbb-gpio-intc", |
| "amlogic,meson-gpio-intc"; |
| reg = <0x0 0x9880 0x0 0x10>; |
| interrupt-controller; |
| #interrupt-cells = <2>; |
| meson,channel-interrupts = <64 65 66 67 68 69 70 71>; |
| }; |
