linux-kernel - [PATCH v3 3/3] dt-bindings: mfd: dlg,da9063: document voltage monitoring

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Date:   Wed, 05 Apr 2023 19:14:36 +0200
From:   Benjamin Bara <bbara93@...il.com>
To:     Support Opensource <support.opensource@...semi.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, Lee Jones <lee@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Steve Twiss <stwiss.opensource@...semi.com>
Cc:     DLG-Adam.Thomson.Opensource@...renesas.com,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Matti Vaittinen <mazziesaccount@...il.com>,
        Benjamin Bara <benjamin.bara@...data.com>
Subject: [PATCH v3 3/3] dt-bindings: mfd: dlg,da9063: document voltage
 monitoring

From: Benjamin Bara <benjamin.bara@...data.com>

Document that the da9063 only provides under- *and* over-voltage
monitoring in one, and therefore requires both to be configured with the
same severity and value. Add an example for clarification.

Signed-off-by: Benjamin Bara <benjamin.bara@...data.com>
---
 Documentation/devicetree/bindings/mfd/dlg,da9063.yaml | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/mfd/dlg,da9063.yaml b/Documentation/devicetree/bindings/mfd/dlg,da9063.yaml
index e8e74e91070c..c5a7e10d7d80 100644
--- a/Documentation/devicetree/bindings/mfd/dlg,da9063.yaml
+++ b/Documentation/devicetree/bindings/mfd/dlg,da9063.yaml
@@ -12,6 +12,11 @@ maintainers:
 description: |
   For device-tree bindings of other sub-modules refer to the binding documents
   under the respective sub-system directories.
+  Using regulator-{uv,ov}-{warn,error,protection}-microvolt requires special
+  handling: First, when GP_FB2 is used, it must be ensured that there is no
+  moment where all voltage monitors are disabled. Next, as da9063 only supports
+  UV *and* OV monitoring, both must be set to the same severity and value
+  (0: disable, 1: enable).
 
 properties:
   compatible:
@@ -121,11 +126,19 @@ examples:
             regulator-max-microamp = <2000000>;
             regulator-boot-on;
           };
+          ldo6 {
+            /* UNUSED */
+            regulator-name = "LDO_6";
+            regulator-uv-protection-microvolt = <0>;
+            regulator-ov-protection-microvolt = <0>;
+          };
           ldo11 {
             regulator-name = "LDO_11";
             regulator-min-microvolt = <900000>;
-            regulator-max-microvolt = <3600000>;
-            regulator-boot-on;
+            regulator-max-microvolt = <900000>;
+            regulator-uv-protection-microvolt = <1>;
+            regulator-ov-protection-microvolt = <1>;
+            regulator-always-on;
           };
         };
       };

-- 
2.34.1