linux-kernel - [PATCH V1 1/3] dt-bindings: ufs: qcom: Add reg and reg-names

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Message-ID: <20250730082229.23475-2-quic_rdwivedi@quicinc.com>
Date: Wed, 30 Jul 2025 13:52:27 +0530
From: Ram Kumar Dwivedi <quic_rdwivedi@...cinc.com>
To: <mani@...nel.org>, <alim.akhtar@...sung.com>, <avri.altman@....com>,
        <bvanassche@....org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <andersson@...nel.org>,
        <konradybcio@...nel.org>, <agross@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <linux-scsi@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH V1 1/3] dt-bindings: ufs: qcom: Add reg and reg-names

Update the Qualcomm UFS device tree bindings to support Multi-Circular
Queue (MCQ) operation. This includes increasing the maximum number of
register entries from 2 to 3 and extending the accepted values for
reg-names to include "mcq_sqd" and "mcq_vs".

These changes are required to enable MCQ support via Device Tree for
platforms such as SM8650 and SM8750.

Signed-off-by: Ram Kumar Dwivedi <quic_rdwivedi@...cinc.com>
---
 .../devicetree/bindings/ufs/qcom,ufs.yaml     | 21 ++++++++++++-------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml b/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
index 6c6043d9809e..de263118b552 100644
--- a/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
+++ b/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
@@ -86,12 +86,17 @@ properties:
 
   reg:
     minItems: 1
-    maxItems: 2
+    maxItems: 3
 
   reg-names:
-    items:
-      - const: std
-      - const: ice
+    oneOf:
+      - items:
+          - const: std
+          - const: ice
+      - items:
+          - const: ufs_mem
+          - const: mcq_sqd
+          - const: mcq_vs
 
   required-opps:
     maxItems: 1
@@ -177,9 +182,9 @@ allOf:
             - const: rx_lane1_sync_clk
         reg:
           minItems: 1
-          maxItems: 1
+          maxItems: 3
         reg-names:
-          maxItems: 1
+          maxItems: 3
 
   - if:
       properties:
@@ -280,7 +285,7 @@ allOf:
     then:
       properties:
         reg:
-          maxItems: 1
+          maxItems: 3
         clocks:
           minItems: 7
           maxItems: 8
@@ -288,7 +293,7 @@ allOf:
       properties:
         reg:
           minItems: 1
-          maxItems: 2
+          maxItems: 3
         clocks:
           minItems: 7
           maxItems: 9
-- 
2.50.1