Re: [PATCH 0/2] platform/x86: ideapad-laptop: Add charge_types:Fast (Rapid Charge)

[Jelle van der Waa]

On 10/20/25 21:24, Rong Zhang wrote:
> The GBMD/SBMC interface on IdeaPad/ThinkBook supports Rapid Charge mode
> (charge_types: Fast) in addition to Conservation Mode (charge_types:
> Long_Life).
>
> This patchset exposes these two modes while carefully maintaining their
> mutually exclusive state, which aligns with the behavior of manufacturer
> utilities on Windows.
>
> Tested on ThinkBook 14 G7+ ASP.

Tested this patch on my Lenovo Ideapad U330p, it now advertises that 
`Fast` is a supported charge_type although my laptop does not seem to 
support it:

[root@archlinux jelle]# cat /sys/class/power_supply/BAT1/charge_types
Fast [Standard] Long_Life
[root@archlinux jelle]# echo 'Fast' > 
/sys/class/power_supply/BAT1/charge_types
[root@archlinux jelle]# cat /sys/class/power_supply/BAT1/charge_types
Fast [Standard] Long_Life

I'm wondering if the battery extension API allows to not advertise a 
property if it isn't supported or if it should at least return -EINVAL.

Greetings,

Jelle van der Waa