linux-kernel - [RFT PATCH 01/12] dt-bindings: hwlock: qcom-hwspinlock: add support for MMIO on older SoCs

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Date:   Wed, 17 Aug 2022 16:14:04 +0300
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Ohad Ben-Cohen <ohad@...ery.com>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Lee Jones <lee@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [RFT PATCH 01/12] dt-bindings: hwlock: qcom-hwspinlock: add support for MMIO on older SoCs

Older Qualcomm SoCs have TCSR mutex registers with 0x80 stride, instead
of 0x1000.  Add dedicated compatibles for such case.  Unfortunately the
binding started using a generic "qcom,tcsr-mutex" compatible without
specifying the SoC part, thus it looks now quite inconsistent.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

---

If anyone ever says "I want a generic compatible because I am sure all
devices are compatible", that's one more argument they are wrong. :)
---
 .../bindings/hwlock/qcom-hwspinlock.yaml          | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml b/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml
index 1c7149f7d171..de98b961fb38 100644
--- a/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml
+++ b/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml
@@ -15,9 +15,18 @@ description:
 
 properties:
   compatible:
-    enum:
-      - qcom,sfpb-mutex
-      - qcom,tcsr-mutex
+    oneOf:
+      - enum:
+          - qcom,sfpb-mutex
+          - qcom,tcsr-mutex
+      - items:
+          - enum:
+              - qcom,apq8084-tcsr-mutex
+              - qcom,ipq6018-tcsr-mutex
+              - qcom,msm8226-tcsr-mutex
+              - qcom,msm8974-tcsr-mutex
+              - qcom,msm8994-tcsr-mutex
+          - const: qcom,tcsr-mutex
 
   reg:
     maxItems: 1
-- 
2.34.1