From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- .../interrupt-controller/brcm,bcm6345-l1-intc.txt | 55 ++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/brcm,bcm6345-l1-intc.txt (limited to 'Documentation/devicetree/bindings/interrupt-controller/brcm,bcm6345-l1-intc.txt') diff --git a/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm6345-l1-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm6345-l1-intc.txt new file mode 100644 index 000000000..2bc19b1ac --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm6345-l1-intc.txt @@ -0,0 +1,55 @@ +Broadcom BCM6345-style Level 1 interrupt controller + +This block is a first level interrupt controller that is typically connected +directly to one of the HW INT lines on each CPU. + +Key elements of the hardware design include: + +- 32, 64 or 128 incoming level IRQ lines + +- Most onchip peripherals are wired directly to an L1 input + +- A separate instance of the register set for each CPU, allowing individual + peripheral IRQs to be routed to any CPU + +- Contains one or more enable/status word pairs per CPU + +- No atomic set/clear operations + +- No polarity/level/edge settings + +- No FIFO or priority encoder logic; software is expected to read all + 2-4 status words to determine which IRQs are pending + +Required properties: + +- compatible: should be "brcm,bcm-l1-intc", "brcm,bcm6345-l1-intc" +- reg: specifies the base physical address and size of the registers; + the number of supported IRQs is inferred from the size argument +- interrupt-controller: identifies the node as an interrupt controller +- #interrupt-cells: specifies the number of cells needed to encode an interrupt + source, should be 1. +- interrupts: specifies the interrupt line(s) in the interrupt-parent controller + node; valid values depend on the type of parent interrupt controller + +If multiple reg ranges and interrupt-parent entries are present on an SMP +system, the driver will allow IRQ SMP affinity to be set up through the +/proc/irq/ interface. In the simplest possible configuration, only one +reg range and one interrupt-parent is needed. + +The driver operates in native CPU endian by default, there is no support for +specifying an alternative endianness. + +Example: + +periph_intc: interrupt-controller@10000000 { + compatible = "brcm,bcm63168-l1-intc", "brcm,bcm6345-l1-intc"; + reg = <0x10000020 0x20>, + <0x10000040 0x20>; + + interrupt-controller; + #interrupt-cells = <1>; + + interrupt-parent = <&cpu_intc>; + interrupts = <2>, <3>; +}; -- cgit v1.2.3