linux-kernel - [PATCH RESEND] dt-bindings: ufs: qcom: allow 'dma-coherent' property

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Date:   Mon, 16 Jan 2023 17:42:36 +0100
From:   Johan Hovold <johan+linaro@...nel.org>
To:     "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        Bart Van Assche <bvanassche@....org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-scsi@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Johan Hovold <johan+linaro@...nel.org>,
        Rob Herring <robh@...nel.org>
Subject: [PATCH RESEND] dt-bindings: ufs: qcom: allow 'dma-coherent' property

UFS controllers may be cache coherent and must be marked as such in the
devicetree to avoid data corruption.

This is specifically needed on recent Qualcomm platforms like SC8280XP.

Reviewed-by: Rob Herring <robh@...nel.org>
Reviewed-by: Bjorn Andersson <andersson@...nel.org>
Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
---

James and Martin,

I'm resending as reminder in case you missed the first submission which
included an arm64 dts update and also did not have you on CC as I was
following scripts/get_maintainer.pl too literally:

	https://lore.kernel.org/all/20221205100837.29212-1-johan+linaro@kernel.org/

I've added Rob and Bjorn's Reviewed-by tags from the above thread.

Could you take this one through the scsi tree?

Johan


 Documentation/devicetree/bindings/ufs/qcom,ufs.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml b/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
index f2d6298d926c..1f1d286749c0 100644
--- a/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
+++ b/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
@@ -44,6 +44,8 @@ properties:
     minItems: 8
     maxItems: 11
 
+  dma-coherent: true
+
   interconnects:
     minItems: 2
     maxItems: 2
-- 
2.38.2