dt-bindings: consolidate interrupt controller bindings

[firefly-linux-kernel-4.4.55.git] / Documentation / devicetree / bindings / c6x / interrupt.txt

diff --git a/Documentation/devicetree/bindings/c6x/interrupt.txt b/Documentation/devicetree/bindings/c6x/interrupt.txt
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-C6X Interrupt Chips
--------------------
-
-* C64X+ Core Interrupt Controller
-
-  The core interrupt controller provides 16 prioritized interrupts to the
-  C64X+ core. Priority 0 and 1 are used for reset and NMI respectively.
-  Priority 2 and 3 are reserved. Priority 4-15 are used for interrupt
-  sources coming from outside the core.
-
-  Required properties:
-  --------------------
-  - compatible: Should be "ti,c64x+core-pic";
-  - #interrupt-cells: <1>
-
-  Interrupt Specifier Definition
-  ------------------------------
-  Single cell specifying the core interrupt priority level (4-15) where
-  4 is highest priority and 15 is lowest priority.
-
-  Example
-  -------
-  core_pic: interrupt-controller@0 {
-       interrupt-controller;
-       #interrupt-cells = <1>;
-       compatible = "ti,c64x+core-pic";
-  };
-
-
-
-* C64x+ Megamodule Interrupt Controller
-
-  The megamodule PIC consists of four interrupt mupliplexers each of which
-  combine up to 32 interrupt inputs into a single interrupt output which
-  may be cascaded into the core interrupt controller. The megamodule PIC
-  has a total of 12 outputs cascading into the core interrupt controller.
-  One for each core interrupt priority level. In addition to the combined
-  interrupt sources, individual megamodule interrupts may be cascaded to
-  the core interrupt controller. When an individual interrupt is cascaded,
-  it is no longer handled through a megamodule interrupt combiner and is
-  considered to have the core interrupt controller as the parent.
-
-  Required properties:
-  --------------------
-  - compatible: "ti,c64x+megamod-pic"
-  - interrupt-controller
-  - #interrupt-cells: <1>
-  - reg: base address and size of register area
-  - interrupt-parent: must be core interrupt controller
-  - interrupts: This should have four cells; one for each interrupt combiner.
-                The cells contain the core priority interrupt to which the
-                corresponding combiner output is wired.
-
-  Optional properties:
-  --------------------
-  - ti,c64x+megamod-pic-mux: Array of 12 cells correspnding to the 12 core
-                             priority interrupts. The first cell corresponds to
-                             core priority 4 and the last cell corresponds to
-                             core priority 15. The value of each cell is the
-                             megamodule interrupt source which is MUXed to
-                             the core interrupt corresponding to the cell
-                             position. Allowed values are 4 - 127. Mapping for
-                             interrupts 0 - 3 (combined interrupt sources) are
-                             ignored.
-
-  Interrupt Specifier Definition
-  ------------------------------
-  Single cell specifying the megamodule interrupt source (4-127). Note that
-  interrupts mapped directly to the core with "ti,c64x+megamod-pic-mux" will
-  use the core interrupt controller as their parent and the specifier will
-  be the core priority level, not the megamodule interrupt number.
-
-  Examples
-  --------
-  megamod_pic: interrupt-controller@1800000 {
-       compatible = "ti,c64x+megamod-pic";
-       interrupt-controller;
-       #interrupt-cells = <1>;
-       reg = <0x1800000 0x1000>;
-       interrupt-parent = <&core_pic>;
-       interrupts = < 12 13 14 15 >;
-  };
-
-  This is a minimal example where all individual interrupts go through a
-  combiner. Combiner-0 is mapped to core interrupt 12, combiner-1 is mapped
-  to interrupt 13, etc.
-
-
-  megamod_pic: interrupt-controller@1800000 {
-       compatible = "ti,c64x+megamod-pic";
-       interrupt-controller;
-       #interrupt-cells = <1>;
-       reg = <0x1800000 0x1000>;
-       interrupt-parent = <&core_pic>;
-       interrupts = < 12 13 14 15 >;
-       ti,c64x+megamod-pic-mux = <  0  0  0  0
-                                    32  0  0  0
-                                     0  0  0  0 >;
-  };
-
-  This the same as the first example except that megamodule interrupt 32 is
-  mapped directly to core priority interrupt 8. The node using this interrupt
-  must set the core controller as its interrupt parent and use 8 in the
-  interrupt specifier value.