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ARM: dts: imx6qdl-hummingboard: Add rtc0 and rtc1 aliases to fix hctosys

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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 <josua@solid-run.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Josua Mayer 2024-01-18 16:01:10 +01:00 committed by Shawn Guo
parent 8458002b76
commit 2a33952350
2 changed files with 11 additions and 1 deletions
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7
arch/arm/boot/dts/nxp/imx/imx6qdl-hummingboard.dtsi
View File

@ -41,6 +41,11 @@
#include <dt-bindings/sound/fsl-imx-audmux.h>
/ {
aliases {
rtc0 = &carrier_rtc;
rtc1 = &snvs_rtc;
};
/* Will be filled by the bootloader */
memory@10000000 {
device_type = "memory";
@ -187,7 +192,7 @@ &i2c1 {
status = "okay";
/* Pro baseboard model */
rtc@68 {
carrier_rtc: rtc@68 {
compatible = "nxp,pcf8523";
reg = <0x68>;
};

5
arch/arm/boot/dts/nxp/imx/imx6qdl-hummingboard2.dtsi
View File

@ -41,6 +41,11 @@
#include <dt-bindings/sound/fsl-imx-audmux.h>
/ {
aliases {
rtc0 = &pcf8523;
rtc1 = &snvs_rtc;
};
/* Will be filled by the bootloader */
memory@10000000 {
device_type = "memory";