[Bug 216176] ideapad-laptop doesn't expose rapid charge

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216176

--- Comment #8 from Hans de Goede (jwrdegoede@fedoraproject.org) ---
A quick update on the conversation-mode thing. Since the conversation-mode in
essence sets a charge star/end threshold it really should just use that
interface. This is what has been done for the similar eco mode on toshiba
laptops:

https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/commit/?id=18ef1bb093ab1e0a74d146cbf4a9d132d01374d8
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/commit/?id=8ef5db9eb084f6212345a7b09355c78ce05f71e2

Note there this is setting the end-threshold, not sure what this does in
ideapad-laptop.

Also we may want to add some extension to the start/end threshold API to query
valid values, so that we can e.g. do:

# cat
/sys/class/power_supply/BAT1/charge_control_end_threshold_supported_values
80,100

In the Toshiba case.

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