01.03.2017, 21:45, "Olliver Schinagl" <o.schin...@ultimaker.com>: > Hey Maxime, > > On 01-03-17 14:00, Maxime Ripard wrote: >> Hi Oliver, >> >> On Wed, Mar 01, 2017 at 01:52:16PM +0100, Olliver Schinagl wrote: >>> Hi list, >>> >>> 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 shutsdown (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. >>> >>> The root cause is that some boards have to high capacitance on the LDO3 >>> output >>> port causing inrush currents exceeding the maximum of the AXP209. >>> >>> The fix is to turn on the LDO3 at the lowest possible voltage and then set >>> the >>> final voltage. >>> >>> If the capacitance is really big (due to a connected device for example) >>> the >>> AXP209 also features VRC, or Voltage Rate Control, which allows the voltage >>> ramp up to be even slower. >>> >>> This patch series implements the above with a few tiny, cleanups I ran into >>> underway. >>> >>> The initial discussion with some scope screenshots can be found in the >>> linux-sunxi mailing list [0]. >> >> If you don't CC the proper maintainers, no one is going to pick the patches. > > who did I miss? I did use the get_maintainers script, and added you > explicitly. > > There is no sunxi custodian anymore, it is orphaned.
Currently maintainers are Maxime Ripard and Jegan Teki. > >> Maxime > > -- > You received this message because you are subscribed to the Google Groups > "linux-sunxi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to linux-sunxi+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/listinfo/u-boot
