[U-Boot] [linux-sunxi] Re: [PATCH v3 0/9] Stop AXP from crashing when enabling LDO3

[Priit Laes]

On Wed, Nov 21, 2018 at 03:58:18PM -0500, Stefan Monnier wrote:
> > When powering up an AXP209, the default value for LDO3 output is
> > enabled.  This works fine.  However if for whatever reason, LDO3 is
> > disabled, for example by OS during reboot and u-boot enables LDO3
> > again, the PMIC shuts down (without setting an interrupt) causing the
> > board to hang.  This behavior has been seen from Linux as well, u-boot
> > disables LDO3 as a default value, the kernel enables it per its DTS,
> > the kernel hangs as the PMIC gets shut down.
> 
> Hmm... I've never had any problems booting my Orange Pi mini, but it
> (almost) always hangs on reboot (right after the final message from the
> OS and before the first message from U-boot).
> Any chance this is the same problem?

Well, f you have the hardware, then there's only one way to find out:

1) Apply patchset
2) Add following into boards defconfig:
CONFIG_AXP_ALDO3_INRUSH_QUIRK=y
3) If it still fails to reboot, add following
CONFIG_AXP_ALDO3_VOLT_SLOPE_08=y
> 
> 
>         Stefan
> 
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