Hi Samuel, tried setting OPP voltages in 50mV increments. That doesn't seem to work. Shouldn't /sys/class/regulator/regulator.9/microvolts show the actual microvolts supplied to the CPU? When setting the lowest value to 1.15V I never see a value lower than 1.2V in the above. Either I am looking to the wrong part or the regulator is rounding the value I would say. Any comments?
regards Torsten sam...@sholland.org schrieb am Mittwoch, 20. Juli 2022 um 05:24:27 UTC+2: > Hi Torsten, > > On 7/19/22 3:44 AM, Torsten Beyer wrote: > > fantastic - I have built a kernel with changed setting yesterday > afternoon > > (increased min OPP to 1.1V) and the system has been running for about > 20hrs now > > without freezes. Thanks for your help - looks like this patch fixes it. > > Thanks for the confirmation. The voltage regulator supplying the CPU > (reg_dcdc2) > has a 25 mV step size, so you could see if a smaller change to the OPP is > enough > to make the board stable. > > I assume you are powering the board with a reasonably stable power supply? > In > that case, it would be good to apply your change upstream, in case any > other > Cubieboard 2 users are experiencing crashes. If you want to submit a > patch, I > would suggest overriding the OPP table in the board-specific DTS. See > here[1] > for an example of a board that does this. > > Regards, > Samuel > > [1]: > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/sun7i-a20-bananapi.dts#n105 > -- 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. To view this discussion on the web, visit https://groups.google.com/d/msgid/linux-sunxi/37d78b1c-92da-42c6-b95a-9a756e8713bbn%40googlegroups.com.
