narmstrong changed the topic of #linux-amlogic to: Amlogic mainline kernel development discussion - our wiki http://linux-meson.com/ - ml linux-amlogic@lists.infradead.org - official channel moved from Freenode - publicly logged on https://libera.irclog.whitequark.org/linux-amlogic
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<konsgn> I have what I think is an s905x3 based tv box. what I am trying to figure out is if the box itself has an npu unit. So far, from the armbian image I was able to load I see the peripheral space 0xFF100000-0xFF130000. When I run my compiled devmem2 binary, I don't get errors reading from any 64-bit aligned address in this space, but everything
<konsgn> returns 0. Is it that the chipset I am working with doesn't have the npu peripheral?
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<xdarklight> konsgn: it's marked as optional in the datasheet. reading back only zeros can also mean that the register area is not enabled (I've seen those gated by clocks, resets and power domains). upstream does define the clocks, resets here https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi?id=2014c95afecee3e76ca4a56956a936e23283f05b#n2570 and the power domain here: https://git.kernel.
<xdarklight> org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi?id=2014c95afecee3e76ca4a56956a936e23283f05b#n554
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<konsgn> Thank you xdarklight! Will try manually bitbanging those to see if I can enable/ if anythings there.
<konsgn> Actually... ill check for a system register that has chip rewision first
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