linux-kernel - [PATCH v2 01/16] dt-bindings: dma: qcom,bam: Add bam pipe lock

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Message-Id: <20240815085725.2740390-2-quic_mdalam@quicinc.com>
Date: Thu, 15 Aug 2024 14:27:10 +0530
From: Md Sadre Alam <quic_mdalam@...cinc.com>
To: vkoul@...nel.org, robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
        andersson@...nel.org, konradybcio@...nel.org, thara.gopinath@...il.com,
        herbert@...dor.apana.org.au, davem@...emloft.net,
        gustavoars@...nel.org, u.kleine-koenig@...gutronix.de, kees@...nel.org,
        agross@...nel.org, linux-arm-msm@...r.kernel.org,
        dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org
Cc: quic_srichara@...cinc.com, quic_varada@...cinc.com,
        quic_mdalam@...cinc.com, quic_utiwari@...cinc.com
Subject: [PATCH v2 01/16] dt-bindings: dma: qcom,bam: Add bam pipe lock

BAM having pipe locking mechanism. The Lock and Un-Lock bit
should be set on CMD descriptor only. Upon encountering a
descriptor with Lock bit set, the BAM will lock all other
pipes not related to the current pipe group, and keep
handling the current pipe only until it sees the Un-Lock
set.

Signed-off-by: Md Sadre Alam <quic_mdalam@...cinc.com>
---

Change in [v2]

* Added initial support for dt-binding

Change in [v1]

* This patch was not included in [v1]

 Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml b/Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml
index 3ad0d9b1fbc5..91cc2942aa62 100644
--- a/Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml
+++ b/Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml
@@ -77,6 +77,12 @@ properties:
       Indicates that the bam is powered up by a remote processor but must be
       initialized by the local processor.
 
+  qcom,bam_pipe_lock:
+    type: boolean
+    description:
+      Indicates that the bam pipe needs locking or not based on client driver
+      sending the LOCK or UNLOK bit set on command descriptor.
+
   reg:
     maxItems: 1
 
@@ -92,6 +98,8 @@ anyOf:
       - qcom,powered-remotely
   - required:
       - qcom,controlled-remotely
+  - required:
+      - qcom,bam_pipe_lock
   - required:
       - clocks
       - clock-names
-- 
2.34.1