Merge branch 'topic/qcom' into for-linus

This commit is contained in:
Vinod Koul
2016-12-14 09:06:54 +05:30
7 changed files with 280 additions and 106 deletions

View File

@@ -5,13 +5,13 @@ memcpy and memset capabilities. It has been designed for virtualized
environments.
Each HIDMA HW instance consists of multiple DMA channels. These channels
share the same bandwidth. The bandwidth utilization can be parititioned
share the same bandwidth. The bandwidth utilization can be partitioned
among channels based on the priority and weight assignments.
There are only two priority levels and 15 weigh assignments possible.
Other parameters here determine how much of the system bus this HIDMA
instance can use like maximum read/write request and and number of bytes to
instance can use like maximum read/write request and number of bytes to
read/write in a single burst.
Main node required properties:
@@ -47,12 +47,18 @@ 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.
Required properties:
- 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 : See the generic MSI binding described in
devicetree/bindings/interrupt-controller/msi.txt for a description of the
msi-parent property.
Example:
Hypervisor OS configuration: