The VCHIQ communication channel can be provided by BCM283x and Capri
SoCs, to communicate with the VPU-side OS services.
Signed-off-by: Eric Anholt <eric@xxxxxxxxxx>
---
v2: dropped firmware property, added cache-line-size.
.../bindings/soc/bcm/brcm,bcm2835-vchiq.txt | 28 ++++++++++++++++++++++
1 file changed, 28 insertions(+)
create mode 100644 Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-vchiq.txt
diff --git a/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-vchiq.txt b/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-vchiq.txt
new file mode 100644
index 000000000000..cdef4abc5e47
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-vchiq.txt
@@ -0,0 +1,28 @@
+Broadcom VCHIQ firmware services
+
+Required properties:
+
+- compatible: Should be "brcm,bcm2835-vchiq"
+- reg: Physical base address and length of the doorbell register pair
+- interrupts: The interrupt number
+ See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
+
+Optional properties:
+
+- cache-line-size:
+ Size of L2 cache lines. The VPU firmware detects
+ this property and overrides it with the actual L2
+ cache line size it's using when loading the
+ device-tree. Determines the required alignment of
+ offsets/sizes of VCHIQ pagelists. If missing, the
+ firmware assumes an older kernel using 32-byte
+ alignment.
+
+Example:
+
+vchiq@7e00b840 {
+ compatible = "brcm,bcm2835-vchiq";
+ reg = <0x7e00b840 0xf>;
+ interrupts = <0 2>;
+ cache-line-size: <32>;
+};
--
2.16.2
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