linux-stable/Documentation/devicetree/bindings/interrupt-controller/nvidia,tegra20-ictlr.txt
Linus Torvalds 4d88e3d249 Devicetree updates for 4.19:
- Remove an obsolete hack for PPC32 longtrail systems
 
 - Make of_io_request_and_map() "name" arg optional
 
 - Add vendor prefixes for bitmain, Asus, and Y Soft
 
 - Remove 'interrupt-parent' from bindings as it is implicit
 
 - New properties for wm8994 audio codec
 
 - Add 'clocks' property support to SRAM binding
 
 - Add binding for ASPEED coprocessor interrupt controller
 
 - Various binding spelling and link fixes
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Merge tag 'devicetree-for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull Devicetree updates from Rob Herring:

 - Remove an obsolete hack for PPC32 longtrail systems

 - Make of_io_request_and_map() "name" arg optional

 - Add vendor prefixes for bitmain, Asus, and Y Soft

 - Remove 'interrupt-parent' from bindings as it is implicit

 - New properties for wm8994 audio codec

 - Add 'clocks' property support to SRAM binding

 - Add binding for ASPEED coprocessor interrupt controller

 - Various binding spelling and link fixes

* tag 'devicetree-for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  Documentation: remove dynamic-resolution-notes reference to non-existent file
  dt-bindings: Add Y Soft Corporation vendor prefix
  of/fdt: Remove PPC32 longtrail hack in memory scan
  dt-bindings: remove 'interrupt-parent' from bindings
  pinctrl: tegra: fix spelling in devicetree binding document
  usb: dwc3: rockchip: Fix PHY documentation links.
  dt-bindings: sound: wm8994: document wlf,csnaddr-pd property
  dt-bindings: sound: wm8994: document wlf,spkmode-pu property
  dt-bindings: sram: Add 'clocks' as an optional property
  dt-bindings: Add vendor prefix for AsusTek Computer Inc.
  dt-bindings: misc: ASPEED coprocessor interrupt controller
  dt-bindings: gpio: pca953x: Document interrupts, update example
  drivers/of: Make of_io_request_and_map() "name" argument optional
  dt-bindings: Add bitmain vendor prefix
  Documentation: devicetree: tilcdc: fix spelling mistake "suppors" -> "supports"
2018-08-14 12:41:49 -07:00

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NVIDIA Legacy Interrupt Controller
All Tegra SoCs contain a legacy interrupt controller that routes
interrupts to the GIC, and also serves as a wakeup source. It is also
referred to as "ictlr", hence the name of the binding.
The HW block exposes a number of interrupt controllers, each
implementing a set of 32 interrupts.
Required properties:
- compatible : should be: "nvidia,tegra<chip>-ictlr". The LIC on
subsequent SoCs remained backwards-compatible with Tegra30, so on
Tegra generations later than Tegra30 the compatible value should
include "nvidia,tegra30-ictlr".
- reg : Specifies base physical address and size of the registers.
Each controller must be described separately (Tegra20 has 4 of them,
whereas Tegra30 and later have 5).
- 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 3.
Notes:
- Because this HW ultimately routes interrupts to the GIC, the
interrupt specifier must be that of the GIC.
- Only SPIs can use the ictlr as an interrupt parent. SGIs and PPIs
are explicitly forbidden.
Example:
ictlr: interrupt-controller@60004000 {
compatible = "nvidia,tegra20-ictlr", "nvidia,tegra-ictlr";
reg = <0x60004000 64>,
<0x60004100 64>,
<0x60004200 64>,
<0x60004300 64>;
interrupt-controller;
#interrupt-cells = <3>;
interrupt-parent = <&intc>;
};