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From: Neil Armstrong <neil.armstrong@linaro.org>
Date: Tue, 04 Oct 2022 08:08:21 +0000
Subject: [PATCH v2 05/11] dt-bindings: mfd: qcom-pm8xxx: document qcom, pm8921
 as fallback of qcom,pm8018
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Message-Id: <20220928-mdm9615-dt-schema-fixes-v2-5-87fbeb4ae053@linaro.org>
References: <20220928-mdm9615-dt-schema-fixes-v2-0-87fbeb4ae053@linaro.org>
In-Reply-To: <20220928-mdm9615-dt-schema-fixes-v2-0-87fbeb4ae053@linaro.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 Bjorn Andersson <andersson@kernel.org>,
 Satya Priya <quic_c_skakit@quicinc.com>, Andy Gross <agross@kernel.org>,
 Alexandre Belloni <alexandre.belloni@bootlin.com>,
 Rob Herring <robh+dt@kernel.org>,
 Konrad Dybcio <konrad.dybcio@somainline.org>, Lee Jones <lee@kernel.org>,
 Dmitry Torokhov <dmitry.torokhov@gmail.com>,
 Alessandro Zummo <a.zummo@towertech.it>
Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
 Bjorn Andersson <andersson@kernel.org>, linux-input@vger.kernel.org,
 Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
 Neil Armstrong <neil.armstrong@linaro.org>,
 linux-arm-msm@vger.kernel.org, linux-rtc@vger.kernel.org
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The PM8018 is used as compatible with PM8921 on the MDM9615, document this situation,
and an example section to validate this change.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

diff --git a/Documentation/devicetree/bindings/mfd/qcom-pm8xxx.yaml b/Documentation/devicetree/bindings/mfd/qcom-pm8xxx.yaml
index 61bd0b3ce02f..24d71918ff8a 100644
--- a/Documentation/devicetree/bindings/mfd/qcom-pm8xxx.yaml
+++ b/Documentation/devicetree/bindings/mfd/qcom-pm8xxx.yaml
@@ -15,11 +15,15 @@ description: |
 
 properties:
   compatible:
-    enum:
-      - qcom,pm8018
-      - qcom,pm8058
-      - qcom,pm8821
-      - qcom,pm8921
+    oneOf:
+      - enum:
+          - qcom,pm8058
+          - qcom,pm8821
+          - qcom,pm8921
+      - items:
+          - enum:
+              - qcom,pm8018
+          - const: qcom,pm8921
 
   reg:
     maxItems: 1
@@ -52,4 +56,35 @@ required:
   - interrupt-controller
 
 additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    ssbi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      pmic@0 {
+        compatible = "qcom,pm8921";
+        reg = <0>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        interrupt-controller;
+        #interrupt-cells = <2>;
+
+        interrupt-parent = <&tlmm>;
+        interrupts = <32 IRQ_TYPE_EDGE_RISING>;
+      };
+
+      pmic@1 {
+        compatible = "qcom,pm8018", "qcom,pm8921";
+        reg = <1>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        interrupt-controller;
+        #interrupt-cells = <2>;
+
+        interrupt-parent = <&tlmm>;
+        interrupts = <33 IRQ_TYPE_EDGE_RISING>;
+      };
+    };
 ...