summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/interrupt-controller/cdns,xtensa-pic.txt
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/interrupt-controller/cdns,xtensa-pic.txt
parentInitial commit. (diff)
downloadlinux-upstream.tar.xz
linux-upstream.zip
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--Documentation/devicetree/bindings/interrupt-controller/cdns,xtensa-pic.txt25
1 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/interrupt-controller/cdns,xtensa-pic.txt b/Documentation/devicetree/bindings/interrupt-controller/cdns,xtensa-pic.txt
new file mode 100644
index 000000000..026ef4cfc
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/cdns,xtensa-pic.txt
@@ -0,0 +1,25 @@
+* Xtensa built-in Programmable Interrupt Controller (PIC)
+
+Required properties:
+- compatible: Should be "cdns,xtensa-pic".
+- interrupt-controller: Identifies the node as an interrupt controller.
+- #interrupt-cells: The number of cells to define the interrupts.
+ It may be either 1 or 2.
+ When it's 1, the first cell is the internal IRQ number.
+ When it's 2, the first cell is the IRQ number, and the second cell
+ specifies whether it's internal (0) or external (1).
+ Periferals are usually connected to a fixed external IRQ, but for different
+ core variants it may be mapped to different internal IRQ.
+ IRQ sensitivity and priority are fixed for each core variant and may not be
+ changed at runtime.
+
+Examples:
+ pic: pic {
+ compatible = "cdns,xtensa-pic";
+ /* one cell: internal irq number,
+ * two cells: second cell == 0: internal irq number
+ * second cell == 1: external irq number
+ */
+ #interrupt-cells = <2>;
+ interrupt-controller;
+ };