1 NVIDIA Legacy Interrupt Controller
3 All Tegra SoCs contain a legacy interrupt controller that routes
4 interrupts to the GIC, and also serves as a wakeup source. It is also
5 referred to as "ictlr", hence the name of the binding.
7 The HW block exposes a number of interrupt controllers, each
8 implementing a set of 32 interrupts.
12 - compatible : should be: "nvidia,tegra<chip>-ictlr". The LIC on
13 subsequent SoCs remained backwards-compatible with Tegra30, so on
14 Tegra generations later than Tegra30 the compatible value should
15 include "nvidia,tegra30-ictlr".
16 - reg : Specifies base physical address and size of the registers.
17 Each controller must be described separately (Tegra20 has 4 of them,
18 whereas Tegra30 and later have 5"
19 - interrupt-controller : Identifies the node as an interrupt controller.
20 - #interrupt-cells : Specifies the number of cells needed to encode an
21 interrupt source. The value must be 3.
22 - interrupt-parent : a phandle to the GIC these interrupts are routed
27 - Because this HW ultimately routes interrupts to the GIC, the
28 interrupt specifier must be that of the GIC.
29 - Only SPIs can use the ictlr as an interrupt parent. SGIs and PPIs
30 are explicitly forbidden.
34 ictlr: interrupt-controller@60004000 {
35 compatible = "nvidia,tegra20-ictlr", "nvidia,tegra-ictlr";
36 reg = <0x60004000 64>,
41 #interrupt-cells = <3>;
42 interrupt-parent = <&intc>;