#linux-sunxi on 2021-12-19 — irc logs at oftc.irclog.whitequark.org

2021-07-26 22:56 ChanServ changed the topic of #linux-sunxi to: Allwinner/sunxi development - Did you try looking at our wiki? https://linux-sunxi.org - Don't ask to ask. Just ask and wait for an answer! - This channel is logged at https://oftc.irclog.whitequark.org/linux-sunxi

00:03 <rajkosto> yes

00:03 <rajkosto> wonder if uboot that boots the kernel matters

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00:14 <apritzel> unlikely

00:15 <apritzel> (unless it's not a mainline U-Boot, but then I guess a mainline kernel wouldn't boot that far)

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00:17 <rajkosto> nah

00:23 <rajkosto> what if i start adding stuff to the openwrt dts piece by piece instead of just using binary armbian one

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01:03 <rajkosto> the pinctrl and rtc work with openwrt dtb

01:03 <rajkosto> vdd-cpux 1 0 0 unknown 1100mV 0mA 1000mV 1400mV

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01:27 <rajkosto> ok cool i just needed to include opp into the openwrt dtb source and cpufreq now works

01:27 <rajkosto> so rtc module =y and small include

01:31 <rajkosto> thanks a lot apritzel you master of kernel

01:32 <apritzel> well, we still don't know what was the actual problem, do we?

01:32 <apritzel> can you put the Armbian DTB somewhere?

01:32 <rajkosto> armbian dtb has different interrupts and stuff for a lot of things, probably to accomodate their kernel patches

01:33 <rajkosto> openwrt one already had all the i2c and rtc stuff it was just disabled by not having that rtc kmod enabled, and then all dtb needed was adding the opp include so cpufreq would activate

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01:36 <rajkosto> the armbian 5.10 patches are here https://github.com/armbian/build/tree/master/patch/kernel/archive/sunxi-5.10

01:36 <rajkosto> i think they default ship with megous though

01:39 <apritzel> yeah, sigh, tons of barely documented patches ...

01:39 <rajkosto> h5 has a couple of "thermal shutdown enablement" patches and the main one that adds the opp include into the board dts

01:39 <rajkosto> thats how i found out what i needed to do

01:40 <rajkosto> openwrt doesnt even use the interrupt controller at that address that armbian uses for rtc, its some different one

01:42 <rajkosto> https://images.sshnuke.net/2021-12-19_02-42-14_MmLiA0AJF.png

01:42 <rajkosto> openwrt on the left

01:43 <rajkosto> (decompiled dtbs on both sides)

01:44 <rajkosto> armbian also has this scpi thing https://images.sshnuke.net/2021-12-19_02-43-58_P11YSWi4P.png

01:47 <apritzel> interesting, there is the mysterious 0x8 that triggered the warning

01:51 <rajkosto> the rtc doesnt even need the interrupts cuz its only needed for pinmux not actual rtc anyway ?

01:54 <apritzel> Linux drivers need to acquire all (non-optional) DT dependencies, whether they are actually needed for operation or not

01:55 <rajkosto> no interrupt-parent on the openwrt one

01:55 <rajkosto> no 1f00c00 interrupt controller def

01:56 <apritzel> yes, because it's routed directly to the GIC on the older (OpenWRT) version:

01:57 <apritzel> the (outgoing) interrupt in the r-intc is 0x20, add the 0x8 from the first RTC interrupt to get the 0x28 from the OpenWRT version

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18:08 <smaeul> jernej: I don't know of any real PRCM documentation, only which code dumps have the most information (specifically: arisc, D1 SPL, and D1 Linux)

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