linux-kernel - [PATCH 1/2] dt-bindings: power: supply: gpio-charger: add support for fast-charge timer

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Message-Id: <20251022-gpio-charger-timer-v1-1-b557409400f2@liebherr.com>
Date: Wed, 22 Oct 2025 21:47:47 +0200
From: Dimitri Fedrau via B4 Relay <devnull+dimitri.fedrau.liebherr.com@...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>
Cc: linux-pm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Dimitri Fedrau <dimitri.fedrau@...bherr.com>, 
 Dimitri Fedrau <dima.fedrau@...il.com>
Subject: [PATCH 1/2] dt-bindings: power: supply: gpio-charger: add support
 for fast-charge timer

From: Dimitri Fedrau <dimitri.fedrau@...bherr.com>

On some devices like TIs BQ24081 battery charger it is possible to activate
or deactivate a fast-charge timer that provides a backup safety for charge
termination via GPIO. In case of the BQ24081 it is a fixed 7-hour timer.

Signed-off-by: Dimitri Fedrau <dimitri.fedrau@...bherr.com>
---
 Documentation/devicetree/bindings/power/supply/gpio-charger.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/power/supply/gpio-charger.yaml b/Documentation/devicetree/bindings/power/supply/gpio-charger.yaml
index 25826bfc289c1c00c338fd0cee2ae6932529cfc3..0edacc104186497118d4ba41f80947009a9aacf6 100644
--- a/Documentation/devicetree/bindings/power/supply/gpio-charger.yaml
+++ b/Documentation/devicetree/bindings/power/supply/gpio-charger.yaml
@@ -62,6 +62,10 @@ properties:
     description: Default charge current limit. Must be listed in
       charge-current-limit-mapping.
 
+  fast-charge-timer-gpios:
+    maxItems: 1
+    description: GPIO used for enabling/disabling the fast-charge timer
+
 required:
   - compatible
 
@@ -97,4 +101,5 @@ examples:
                                      <700000 0x01>, // 700 mA => GPIO A.12 high
                                      <0 0x02>; // 0 mA => GPIO A.11 high
       charge-current-limit-default-microamp = <700000>;
+      fast-charge-timer-gpios = <&gpioA 13 GPIO_ACTIVE_LOW>;
     };

-- 
2.39.5