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authorNishanth Menon <nm@ti.com>2014-06-26 12:40:31 +0530
committerJason Cooper <jason@lakedaemon.net>2014-06-30 19:20:49 +0000
commit2f7d2fb71dd0c14f9c0fe66f2ed7b4685fa745e2 (patch)
tree41e0a9ae3da65a99c8913fb321c0e20faa063a22 /Documentation/devicetree/bindings/arm/omap
parent8b09a45dc12f83f2312a47f0f0087ec4004ebacc (diff)
irqchip: crossbar: Introduce ti, max-crossbar-sources to identify valid crossbar mapping
Currently we attempt to map any crossbar value to an IRQ, however, this is not correct from hardware perspective. There is a max crossbar event number upto which hardware supports. So describe the same in device tree using 'ti,max-crossbar-sources' property and use it to validate requests. [ jac - remove MAX_SOURCES from binding doc, use integer because we shouldn't put implementation details in the binding docs ] Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Sricharan R <r.sricharan@ti.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Link: https://lkml.kernel.org/r/1403766634-18543-14-git-send-email-r.sricharan@ti.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'Documentation/devicetree/bindings/arm/omap')
-rw-r--r--Documentation/devicetree/bindings/arm/omap/crossbar.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/omap/crossbar.txt b/Documentation/devicetree/bindings/arm/omap/crossbar.txt
index 5f45c78e31a9..a6e462f88889 100644
--- a/Documentation/devicetree/bindings/arm/omap/crossbar.txt
+++ b/Documentation/devicetree/bindings/arm/omap/crossbar.txt
@@ -10,6 +10,7 @@ Required properties:
- compatible : Should be "ti,irq-crossbar"
- reg: Base address and the size of the crossbar registers.
- ti,max-irqs: Total number of irqs available at the interrupt controller.
+- ti,max-crossbar-sources: Maximum number of crossbar sources that can be routed.
- ti,reg-size: Size of a individual register in bytes. Every individual
register is assumed to be of same size. Valid sizes are 1, 2, 4.
- ti,irqs-reserved: List of the reserved irq lines that are not muxed using
@@ -30,6 +31,7 @@ Examples:
compatible = "ti,irq-crossbar";
reg = <0x4a002a48 0x130>;
ti,max-irqs = <160>;
+ ti,max-crossbar-sources = <400>;
ti,reg-size = <2>;
ti,irqs-reserved = <0 1 2 3 5 6 131 132 139 140>;
ti,irqs-skip = <10 133 139 140>;