1*4882a593SmuzhiyunAmlogic meson GPIO interrupt controller
2*4882a593Smuzhiyun
3*4882a593SmuzhiyunMeson SoCs contains an interrupt controller which is able to watch the SoC
4*4882a593Smuzhiyunpads and generate an interrupt on edge or level. The controller is essentially
5*4882a593Smuzhiyuna 256 pads to 8 GIC interrupt multiplexer, with a filter block to select edge
6*4882a593Smuzhiyunor level and polarity. It does not expose all 256 mux inputs because the
7*4882a593Smuzhiyundocumentation shows that the upper part is not mapped to any pad. The actual
8*4882a593Smuzhiyunnumber of interrupt exposed depends on the SoC.
9*4882a593Smuzhiyun
10*4882a593SmuzhiyunRequired properties:
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun- compatible : must have "amlogic,meson8-gpio-intc" and either
13*4882a593Smuzhiyun    "amlogic,meson8-gpio-intc" for meson8 SoCs (S802) or
14*4882a593Smuzhiyun    "amlogic,meson8b-gpio-intc" for meson8b SoCs (S805) or
15*4882a593Smuzhiyun    "amlogic,meson-gxbb-gpio-intc" for GXBB SoCs (S905) or
16*4882a593Smuzhiyun    "amlogic,meson-gxl-gpio-intc" for GXL SoCs (S905X, S912)
17*4882a593Smuzhiyun    "amlogic,meson-axg-gpio-intc" for AXG SoCs (A113D, A113X)
18*4882a593Smuzhiyun    "amlogic,meson-g12a-gpio-intc" for G12A SoCs (S905D2, S905X2, S905Y2)
19*4882a593Smuzhiyun    "amlogic,meson-sm1-gpio-intc" for SM1 SoCs (S905D3, S905X3, S905Y3)
20*4882a593Smuzhiyun    "amlogic,meson-a1-gpio-intc" for A1 SoCs (A113L)
21*4882a593Smuzhiyun- reg : Specifies base physical address and size of the registers.
22*4882a593Smuzhiyun- interrupt-controller : Identifies the node as an interrupt controller.
23*4882a593Smuzhiyun- #interrupt-cells : Specifies the number of cells needed to encode an
24*4882a593Smuzhiyun   interrupt source. The value must be 2.
25*4882a593Smuzhiyun- meson,channel-interrupts: Array with the 8 upstream hwirq numbers. These
26*4882a593Smuzhiyun   are the hwirqs used on the parent interrupt controller.
27*4882a593Smuzhiyun
28*4882a593SmuzhiyunExample:
29*4882a593Smuzhiyun
30*4882a593Smuzhiyungpio_interrupt: interrupt-controller@9880 {
31*4882a593Smuzhiyun	compatible = "amlogic,meson-gxbb-gpio-intc",
32*4882a593Smuzhiyun		     "amlogic,meson-gpio-intc";
33*4882a593Smuzhiyun	reg = <0x0 0x9880 0x0 0x10>;
34*4882a593Smuzhiyun	interrupt-controller;
35*4882a593Smuzhiyun	#interrupt-cells = <2>;
36*4882a593Smuzhiyun	meson,channel-interrupts = <64 65 66 67 68 69 70 71>;
37*4882a593Smuzhiyun};
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