[PATCH 1/2] dt-bindings: mfd: mediatek: mt6397: describe the RTC's nvmem layout

[Rob Herring (Arm)]

On Thu, 17 Sep 2026 23:57:46 -0500, Ryan Brue wrote:
> Four of the MT6397 RTC's alarm registers use only their low bits; the
> high byte of each is storage the clock and the alarm don't touch.
> MediaTek's documentation names them RTC_NEW_SPARE0 to RTC_NEW_SPARE3 and
> assigns the first to a fuel gauge, which is what a battery driver reads
> at boot so that the reported capacity does not jump across a reboot.
> 
> They sit in the RTC's always-on domain, so the driver can offer them as
> a battery-backed nvmem provider. Allow a board to lay cells out over
> them.
> 
> Assisted-by: LLM
> Signed-off-by: Ryan Brue <ryanbrue.dev at gmail.com>
> ---
>  Documentation/devicetree/bindings/mfd/mediatek,mt6397.yaml | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 

Reviewed-by: Rob Herring (Arm) <robh at kernel.org>