From 2a33952350712fe93e97eaa59184e62246f85e4f Mon Sep 17 00:00:00 2001 From: Josua Mayer Date: Thu, 18 Jan 2024 16:01:10 +0100 Subject: [PATCH] ARM: dts: imx6qdl-hummingboard: Add rtc0 and rtc1 aliases to fix hctosys HummingBoard has two RTCs, first integrated within SoC that can be used to wake up from sleep - and a second on the carrier board including back-up battery which is intended for keeping time during power-off. Add aliases for both, ensuring that the battery-backed clock is primary rtc and used by default during boot for restoring system time. Fixes keeping time across power-cycle observed on Debian, which sets RTC_HCTOSYS_DEVICE="rtc0". Signed-off-by: Josua Mayer Reviewed-by: Fabio Estevam Signed-off-by: Shawn Guo --- arch/arm/boot/dts/nxp/imx/imx6qdl-hummingboard.dtsi | 7 ++++++- arch/arm/boot/dts/nxp/imx/imx6qdl-hummingboard2.dtsi | 5 +++++ 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/nxp/imx/imx6qdl-hummingboard.dtsi b/arch/arm/boot/dts/nxp/imx/imx6qdl-hummingboard.dtsi index bfade7149080..a955c77cd499 100644 --- a/arch/arm/boot/dts/nxp/imx/imx6qdl-hummingboard.dtsi +++ b/arch/arm/boot/dts/nxp/imx/imx6qdl-hummingboard.dtsi @@ -41,6 +41,11 @@ #include / { + aliases { + rtc0 = &carrier_rtc; + rtc1 = &snvs_rtc; + }; + /* Will be filled by the bootloader */ memory@10000000 { device_type = "memory"; @@ -187,7 +192,7 @@ status = "okay"; /* Pro baseboard model */ - rtc@68 { + carrier_rtc: rtc@68 { compatible = "nxp,pcf8523"; reg = <0x68>; }; diff --git a/arch/arm/boot/dts/nxp/imx/imx6qdl-hummingboard2.dtsi b/arch/arm/boot/dts/nxp/imx/imx6qdl-hummingboard2.dtsi index 0883ef99cded..e6017f9bf640 100644 --- a/arch/arm/boot/dts/nxp/imx/imx6qdl-hummingboard2.dtsi +++ b/arch/arm/boot/dts/nxp/imx/imx6qdl-hummingboard2.dtsi @@ -41,6 +41,11 @@ #include / { + aliases { + rtc0 = &pcf8523; + rtc1 = &snvs_rtc; + }; + /* Will be filled by the bootloader */ memory@10000000 { device_type = "memory"; -- 2.50.1