linux-kernel - Re: [PATCH] ARM: dts: imx6qdl-hummingboard: Add rtc0 and rtc1 aliases to fix hctosys

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Date: Thu, 18 Jan 2024 12:10:02 -0300
From: Fabio Estevam <festevam@...il.com>
To: Josua Mayer <josua@...id-run.com>
Cc: Russell King <linux@...linux.org.uk>, Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
	Pengutronix Kernel Team <kernel@...gutronix.de>, NXP Linux Team <linux-imx@....com>, 
	Yazan Shhady <yazan.shhady@...id-run.com>, Jon Nettleton <jon@...id-run.com>, 
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: imx6qdl-hummingboard: Add rtc0 and rtc1 aliases
 to fix hctosys

On Thu, Jan 18, 2024 at 12:01 PM Josua Mayer <josua@...id-run.com> wrote:
>
> 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@...id-run.com>

Reviewed-by: Fabio Estevam <festevam@...il.com>