linux-kernel - [PATCH] ARM: dts: imx53: enable PMIC RTC on imx53-qsrb

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Message-Id: <20251011060251.13356-1-akurz@blala.de>
Date: Sat, 11 Oct 2025 06:02:51 +0000
From: Alexander Kurz <akurz@...la.de>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>, devicetree@...r.kernel.org,
        linux-input@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Alexander Kurz <akurz@...la.de>
Subject: [PATCH] ARM: dts: imx53: enable PMIC RTC on imx53-qsrb

The RTC inside mc34708 is supported by RTC_DRV_MC13XXX since v3.6-rc1.
Enable the PMIC RTC on the imx53-qsrb. Without a battery the RTC may be
powered via the micro-USB connector when main 5V power is not available.

Signed-off-by: Alexander Kurz <akurz@...la.de>
---
 arch/arm/boot/dts/nxp/imx/imx53-qsrb.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/nxp/imx/imx53-qsrb.dts b/arch/arm/boot/dts/nxp/imx/imx53-qsrb.dts
index 2f06ad61a766..6938ad6dbc2c 100644
--- a/arch/arm/boot/dts/nxp/imx/imx53-qsrb.dts
+++ b/arch/arm/boot/dts/nxp/imx/imx53-qsrb.dts
@@ -28,6 +28,7 @@ pmic: mc34708@8 {
 		reg = <0x08>;
 		interrupt-parent = <&gpio5>;
 		interrupts = <23 IRQ_TYPE_LEVEL_HIGH>;
+		fsl,mc13xxx-uses-rtc;
 		regulators {
 			sw1_reg: sw1a {
 				regulator-name = "SW1";
-- 
2.39.5