mirror of
https://github.com/Evolution-X-Devices/kernel_xiaomi_sm8450-devicetrees
synced 2026-02-01 04:59:05 +00:00
b0e5152a74
Add devicetree bindings snapshot to the devicetree project.
This snapshot is taken as of the
'commit 5fba1b18cfc72e264e5f3ce49020ed322aa6ac9f ("Merge 5.6-rc3
into android-mainline")' of the kernel project.
Change-Id: Ia087ab2b7d4a2616ea446a69683a8b5b821d0448
42 lines
1.4 KiB
Plaintext
42 lines
1.4 KiB
Plaintext
NVIDIA Legacy Interrupt Controller
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All Tegra SoCs contain a legacy interrupt controller that routes
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interrupts to the GIC, and also serves as a wakeup source. It is also
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referred to as "ictlr", hence the name of the binding.
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The HW block exposes a number of interrupt controllers, each
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implementing a set of 32 interrupts.
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Required properties:
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- compatible : should be: "nvidia,tegra<chip>-ictlr". The LIC on
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subsequent SoCs remained backwards-compatible with Tegra30, so on
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Tegra generations later than Tegra30 the compatible value should
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include "nvidia,tegra30-ictlr".
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- reg : Specifies base physical address and size of the registers.
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Each controller must be described separately (Tegra20 has 4 of them,
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whereas Tegra30 and later have 5).
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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 3.
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Notes:
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- Because this HW ultimately routes interrupts to the GIC, the
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interrupt specifier must be that of the GIC.
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- Only SPIs can use the ictlr as an interrupt parent. SGIs and PPIs
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are explicitly forbidden.
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Example:
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ictlr: interrupt-controller@60004000 {
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compatible = "nvidia,tegra20-ictlr", "nvidia,tegra-ictlr";
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reg = <0x60004000 64>,
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<0x60004100 64>,
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<0x60004200 64>,
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<0x60004300 64>;
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interrupt-controller;
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#interrupt-cells = <3>;
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interrupt-parent = <&intc>;
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};
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