linux-kernel - [PATCH V3 01/10] Documentation: DT: qcom

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Message-Id: <1473960166-30155-2-git-send-email-okaya@codeaurora.org>
Date:   Thu, 15 Sep 2016 13:22:37 -0400
From:   Sinan Kaya <okaya@...eaurora.org>
To:     dmaengine@...r.kernel.org, timur@...eaurora.org,
        devicetree@...r.kernel.org, cov@...eaurora.org,
        vinod.koul@...el.com, jcm@...hat.com
Cc:     agross@...eaurora.org, arnd@...db.de,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Sinan Kaya <okaya@...eaurora.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH V3 01/10] Documentation: DT: qcom_hidma: update binding for MSI

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@...eaurora.org>
---
 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
--- a/Documentation/devicetree/bindings/dma/qcom_hidma_mgmt.txt
+++ b/Documentation/devicetree/bindings/dma/qcom_hidma_mgmt.txt
@@ -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.
 
 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: pointer to the MSI controller object with the DeviceID in use.
+
+Example:
+ 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
+instance 1.
+
 Example:
 
 Hypervisor OS configuration:
-- 
1.9.1