linux-kernel - [PATCH v4] dt-bindings: ufs: Add msi-parent for UFS MCQ

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Message-Id: <1701144469-1018-1-git-send-email-quic_ziqichen@quicinc.com>
Date:   Tue, 28 Nov 2023 12:07:47 +0800
From:   Ziqi Chen <quic_ziqichen@...cinc.com>
To:     quic_asutoshd@...cinc.com, quic_cang@...cinc.com,
        bvanassche@....org, mani@...nel.org, stanley.chu@...iatek.com,
        adrian.hunter@...el.com, beanhuo@...ron.com, avri.altman@....com,
        junwoo80.lee@...sung.com, martin.petersen@...cle.com,
        quic_ziqichen@...cinc.com, quic_nguyenb@...cinc.com,
        quic_nitirawa@...cinc.com
Cc:     linux-scsi@...r.kernel.org, Alim Akhtar <alim.akhtar@...sung.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Sudeep Holla <sudeep.holla@....com>,
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v4] dt-bindings: ufs: Add msi-parent for UFS MCQ

The Message Signaled Interrupts (MSI) support has been introduced in
UFSHCI version 4.0 (JESD223E). The MSI is the recommended interrupt
approach for MCQ. If choose to use MSI, In UFS DT, we need to provide
msi-parent property that point to the hardware entity which serves as
the MSI controller for this UFS controller.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Acked-by: Conor Dooley <conor.dooley@...rochip.com>
Signed-off-by: Ziqi Chen <quic_ziqichen@...cinc.com>
---
V3 -> V4: Corrected version change format.
V2 -> V3: Wrap commit message to meet Linux coding style.
V1 -> V2: Rebased on Linux 6.7-rc1 and updated the commit message to
          incorporate the details about when MCQ/MSI got introduced.
---
 Documentation/devicetree/bindings/ufs/ufs-common.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/ufs/ufs-common.yaml b/Documentation/devicetree/bindings/ufs/ufs-common.yaml
index 985ea8f..31fe7f3 100644
--- a/Documentation/devicetree/bindings/ufs/ufs-common.yaml
+++ b/Documentation/devicetree/bindings/ufs/ufs-common.yaml
@@ -87,6 +87,8 @@ properties:
     description:
       Specifies max. load that can be drawn from VCCQ2 supply.
 
+  msi-parent: true
+
 dependencies:
   freq-table-hz: [ clocks ]
   operating-points-v2: [ clocks, clock-names ]
-- 
2.7.4