[Letux-kernel] Pyra charging

[Michael Mrozek]

On Mo, 2020-12-21 at 09:33 +0100, H. Nikolaus Schaller wrote:

That directory doesn't exist on my system:

root at evild-pyra:/sys/kernel/debug/regmap# ls -l
total 0
drwxr-xr-x 2 root root 0 Jan  1  1970 0-0008
drwxr-xr-x 2 root root 0 Jan  1  1970 0-0048
drwxr-xr-x 2 root root 0 Jan  1  1970 0-0049
drwxr-xr-x 2 root root 0 Jan  1  1970 0-004a
drwxr-xr-x 2 root root 0 Jan  1  1970 0-004b
drwxr-xr-x 2 root root 0 Dec 21 20:59 1-004f
drwxr-xr-x 2 root root 0 Jan  1  1970 2-0029
drwxr-xr-x 2 root root 0 Jan  1  1970 2-0076
drwxr-xr-x 2 root root 0 Jan  1  1970 3-0064
drwxr-xr-x 2 root root 0 Jan  1  1970 4-0022
drwxr-xr-x 2 root root 0 Jan  1  1970 4-0064
drwxr-xr-x 2 root root 0 Jan  1  1970 dummy-omap5_padconf_global at 5a0
drwxr-xr-x 2 root root 0 Jan  1  1970 dummy-scm_conf at 0

Could it be that it has a different name / ID

> > Am 20.12.2020 um 21:54 schrieb Michael Mrozek
> > <EvilDragon at openpandora.org>:
> > 
> > So if I want to limit the 3A input to 1A, it works - but 30 - 60
> > seconds later, there's a KERNEL UDEV event reported - and it's back
> > to
> > 3A.
> > 
> > It's the same for the USB FTDI port as well. I can increase the
> > limit -
> > but it's being reset.
> 
> > So we need to find out what causes that reset. Is it the driver?
> > What else could it be?
> 
> It could be the watchdog inside the bq24297. If that one expires it
> resets the chip and starts redetection of the power supply.
> 
> But I think we disable it in u-boot and the kernel driver.
> 
> Please check with
> 
> root at letux:~# fgrep 5: /sys/kernel/debug/regmap/1-006b/registers
> 5: 8a
> root at letux:~# 
> 
> If you see 9x, ax, bx the watchdog timer is enabled for 40, 80, 120
> seconds.
> 
> BR,
> Nikolaus
> 

-- 
Mit freundlichen Grüßen,

Michael Mrozek

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