linux-kernel - [PATCH v4 3/5] dt-bindings: power: supply: add max77759-fg flavor

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Message-Id: <20250523-b4-gs101_max77759_fg-v4-3-b49904e35a34@uclouvain.be>
Date: Fri, 23 May 2025 14:51:46 +0200
From: Thomas Antoine via B4 Relay <devnull+t.antoine.uclouvain.be@...nel.org>
To: Sebastian Reichel <sre@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Dimitri Fedrau <dima.fedrau@...il.com>, 
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
 Peter Griffin <peter.griffin@...aro.org>, 
 André Draszik <andre.draszik@...aro.org>, 
 Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>
Cc: linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-samsung-soc@...r.kernel.org, Thomas Antoine <t.antoine@...ouvain.be>
Subject: [PATCH v4 3/5] dt-bindings: power: supply: add max77759-fg flavor

From: Thomas Antoine <t.antoine@...ouvain.be>

The Maxim MAX77759 is an IC used to manage the power supply of the battery
and the USB-C. Based on drivers from google, it contains at least a PMIC,
a fuel gauge, a TCPCI and a charger.

Use max77759-fg compatible to avoid conflict with drivers for other
functions.

The Maxim MAX77759 has no non-volatile memory so it doesn't require an
address and instead requires a value for the current sensing resistor.

Keep shunt-resistor-micro-ohms optional for the MAX17201/MAX17205 as it is
not be used at the moment but could be in the future. (e.g. as a default
value to be used in case of nvmem failure)

Signed-off-by: Thomas Antoine <t.antoine@...ouvain.be>
---
 .../bindings/power/supply/maxim,max17201.yaml      | 42 ++++++++++++++++++++--
 1 file changed, 39 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/power/supply/maxim,max17201.yaml b/Documentation/devicetree/bindings/power/supply/maxim,max17201.yaml
index fe3dd9bd5585618e45220c51023391a5b21acfd2..2fb826b4b160eb9abe6604185ac2192447d90b8c 100644
--- a/Documentation/devicetree/bindings/power/supply/maxim,max17201.yaml
+++ b/Documentation/devicetree/bindings/power/supply/maxim,max17201.yaml
@@ -9,13 +9,11 @@ title: Maxim MAX17201 fuel gauge
 maintainers:
   - Dimitri Fedrau <dima.fedrau@...il.com>
 
-allOf:
-  - $ref: power-supply.yaml#
-
 properties:
   compatible:
     oneOf:
       - const: maxim,max17201
+      - const: maxim,max77759-fg
       - items:
           - enum:
               - maxim,max17205
@@ -25,11 +23,18 @@ properties:
     items:
       - description: ModelGauge m5 registers
       - description: Nonvolatile registers
+    minItems: 1
+    maxItems: 2
 
   reg-names:
     items:
       - const: m5
       - const: nvmem
+    minItems: 1
+    maxItems: 2
+
+  shunt-resistor-micro-ohms:
+    description: The value of current sense resistor in microohms.
 
   interrupts:
     maxItems: 1
@@ -39,6 +44,37 @@ required:
   - reg
   - reg-names
 
+allOf:
+  - $ref: power-supply.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - maxim,max17201
+    then:
+      properties:
+        reg:
+          minItems: 2
+        reg-names:
+          minItems: 2
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - maxim,max77759-fg
+    then:
+      properties:
+        reg:
+          maxItems: 1
+        reg-names:
+          maxItems: 1
+      required:
+        - shunt-resistor-micro-ohms
+
 unevaluatedProperties: false
 
 examples:

-- 
2.49.0