linux-kernel - [PATCH 2/4] dt-bindings: hwlock: qcom: Allow device on mmio bus

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Date:   Tue, 12 May 2020 17:54:39 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Ohad Ben-Cohen <ohad@...ery.com>,
        Baolin Wang <baolin.wang7@...il.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] dt-bindings: hwlock: qcom: Allow device on mmio bus

In all modern Qualcomm platforms the mutex region of the TCSR is forked
off into its own block, all with a offset of 0 and stride of 4096.
Update the binding to allow the hardware block to be described directly
on the mmio bus, in addition to allowing the existing syscon based
definition.

Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---
 .../bindings/hwlock/qcom-hwspinlock.yaml         | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml b/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml
index 71e63b52edd5..88f975837588 100644
--- a/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml
+++ b/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml
@@ -19,6 +19,9 @@ properties:
       - qcom,sfpb-mutex
       - qcom,tcsr-mutex
 
+  reg:
+    maxItems: 1
+
   '#hwlock-cells':
     const: 1
 
@@ -31,7 +34,12 @@ properties:
 required:
   - compatible
   - '#hwlock-cells'
-  - syscon
+
+oneOf:
+  - required:
+    - reg
+  - required:
+    - syscon
 
 additionalProperties: false
 
@@ -46,6 +54,12 @@ examples:
                 compatible = "qcom,tcsr-mutex";
                 syscon = <&tcsr_mutex_block 0 0x80>;
 
+                #hwlock-cells = <1>;
+        };
+  - |
+        tcsr_mutex: hwlock@...0000 {
+                compatible = "qcom,tcsr-mutex";
+                reg = <0x01f40000 0x40000>;
                 #hwlock-cells = <1>;
         };
 ...
-- 
2.26.2