linux-kernel - [PATCH 1/2] dt-bindings: rtc: pcf2127: Add nxp,battery-switch-over property

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Message-Id: <20241022080121.1594744-2-p.rosenberger@kunbus.com>
Date: Tue, 22 Oct 2024 10:01:20 +0200
From: Philipp Rosenberger <p.rosenberger@...bus.com>
To: Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	linux-rtc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Lino Sanfilippo <l.sanfilippo@...bus.com>,
	Philipp Rosenberger <p.rosenberger@...bus.com>
Subject: [PATCH 1/2] dt-bindings: rtc: pcf2127: Add nxp,battery-switch-over property

The nxp,battery-switch-over property is used to control the switch-over,
battery low detection and extra power fail detection functions.

The PCF2131 has a different default value for the PWRMNG bits. It is set
to 0x7: battery switch-over function is disabled, only one power supply
(VDD); battery low detection function is disabled.
This is the opposite of the default of the PCF2127/PCA2129 and PCF2129.
With the nxp,battery-switch-over the behavior can be controlled through
the device tree.

Signed-off-by: Philipp Rosenberger <p.rosenberger@...bus.com>
---
 Documentation/devicetree/bindings/rtc/nxp,pcf2127.yaml | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/rtc/nxp,pcf2127.yaml b/Documentation/devicetree/bindings/rtc/nxp,pcf2127.yaml
index 2d9fe5a75b06..5739c3e371e7 100644
--- a/Documentation/devicetree/bindings/rtc/nxp,pcf2127.yaml
+++ b/Documentation/devicetree/bindings/rtc/nxp,pcf2127.yaml
@@ -30,6 +30,16 @@ properties:

   reset-source: true

+  nxp,battery-switch-over:
+    description:
+      Battery and power related configuration. This property is used to set the
+      PWRMNG bits of the Control_3 register to control the battery switch-over,
+      battery low detection and extra power fail detection functions.
+      The actual supported functions depend on the device capabilities.
+    $ref: /schemas/types.yaml#/definitions/uint8
+    minimum: 0
+    maximum: 7
+
 required:
   - compatible
   - reg
--
2.39.5

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