SUSE Hack Week: work on sunxi a64 cpufreq driver (for teres-1, pine64)

With the teres-1 [1] laptop we have a first arm64 device we could use as end-users. Much work to run mainline kernel + u-boot was done already. But power consumption of the laptop is not optimal (~2 hours of battery life time).

The idea is to support cpufreq for the A64 SoC upstream, which would enable the teres-1, pine64 and pinebook to run more power efficient. up to now it seems nobody is working on the driver [2].

[1] https://www.olimex.com/Products/DIY-Laptop/

[2] http://linux-sunxi.org/Linuxmainliningeffort

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7 months ago: radolin liked this project.

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over 2 years ago: a_faerber liked this project.

over 2 years ago: mbrugger added keyword "arm64" to this project.

over 2 years ago: mbrugger added keyword "kernel" to this project.

over 2 years ago: mbrugger added keyword "hardware" to this project.

over 2 years ago: mbrugger added keyword "arm" to this project.

over 2 years ago: mbrugger started this project.

over 2 years ago: mbrugger originated this project.

Comments

8 months ago by mbrugger | Reply

CPU freq on A64 is based on a micro-controller. The FW in this contoller has been reverse-engineered and can be added to U-Boot. But we don't have it backaged and AFAIK openSUSE doesn't support the corresponding compiler
16 days ago by mbrugger | Reply

More info about the System Control Processor on the A64 can be found here: https://source.denx.de/u-boot/u-boot/-/blob/master/board/sunxi/README.sunxi64#L64 https://github.com/crust-firmware/crust
16 days ago by mbrugger | Reply

CRUST repository

Information about the SCP firmware