[PATCH V2 01/10] Documentation: DT: qcom_hidma: update binding for MSI
From: Sinan Kaya
Date: Mon Sep 12 2016 - 09:08:33 EST
Adding a new binding for qcom,hidma-1.1 to distinguish HW supporting
MSI interrupts from the older revision.
Signed-off-by: Sinan Kaya <okaya@xxxxxxxxxxxxxx>
Documentation/devicetree/bindings/dma/qcom_hidma_mgmt.txt | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/dma/qcom_hidma_mgmt.txt b/Documentation/devicetree/bindings/dma/qcom_hidma_mgmt.txt
index fd5618b..47bfb5a 100644
@@ -47,12 +47,23 @@ When the OS is not in control of the management interface (i.e. it's a guest),
the channel nodes appear on their own, not under a management node.
-- compatible: must contain "qcom,hidma-1.0"
+- compatible: must contain "qcom,hidma-1.0" for initial HW or "qcom,hidma-1.1"
+for MSI capable HW.
- reg: Addresses for the transfer and event channel
- interrupts: Should contain the event interrupt
- desc-count: Number of asynchronous requests this channel can handle
- iommus: required a iommu node
+Optional properties for MSI:
+- msi-parent: pointer to the MSI controller object with the DeviceID in use.
+ msi_parent: <&msi0 0x80024>
+msi0 is the MSI controller in the system. Bits 0-5 is the channel ID. 4
+is the channel ID. Bits 5-8 is the instance number. This is for the HIDMA
Hypervisor OS configuration: