Re: axp288 on Intel HW

On 11/16/18 12:51 AM, Johannes Lundberg wrote:
> Hi
> 
> I have a Lenovo Ideapad Miix 310 that has a Intel CherryTrail CPU and it
> runs FreeBSD quite nicely (with accelerated graphics). What I'm missing is
> battery life status..
> 
> I can get this information using smb (for some reason i2c just returns
> error sending start condition)
> smbmsg -f /dev/smb6 -s 0x68 -c 0xB9 -i 1 -F %d
> 
> In emergency this works but it would be nice to have a kernel driver for
> it.
> 
> I found the axp2xx driver for Allwinner in the tree. Would it be possible
> to share this with amd64 with not too much effort?
> 
> If not, all I'm really interested in is battery status so I might just hack
> together a simple driver for that report values to hw.acpi.battery (because
> I don't think there is a sysctl for battery info that aggregates different
> sources?)
> 
> Datasheet for the pmic can be found here
> http://download.bbs.ickey.cn/201707/cfe88ee7ef01eed7a4586ce340165da0.pdf

Have you looked to see why ACPI isn't reporting battery status?  Maybe we
need to be invoking some specific method like DSM or OSC before your battery
devices work?  Maybe your battery devices don't have a _STA method and you
need the change in https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227191?

-- 
John Baldwin