Skip to content

Limit GPU frequency on Radxa A7A down to 600MHz by default #28

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Draft
ziyao233 wants to merge 2 commits into
base: tina-dev
Choose a base branch
from
Draft

Limit GPU frequency on Radxa A7A down to 600MHz by default #28

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
2c47f7b
clk: sunxi-ng: sun60i: Propagate GPU core rate changes
ziyao233 Oct 28, 2026
68acd76
arm64: dts: allwinner: Scale GPU down to 600MHz on Radxa A7A
ziyao233 Oct 28, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 6 additions & 0 deletions arch/arm64/boot/dts/allwinner/sun60i-a733-radxa-a7a.dts
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -216,5 +216,11 @@
};

&gpu {
/*
* VDD-GPU (DCDC4 of AXP318W) defaults to 800mV, which only allows the
* GPU operate on only up 600MHz.
*/
assigned-clocks = <&ccu CLK_GPU0>;
assigned-clock-rates = <600000000>;
status = "okay";
};
4 changes: 3 additions & 1 deletion drivers/clk/sunxi-ng/ccu-sun60i-a733.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1013,7 +1013,9 @@ static struct ccu_div gpu0_clk = {
.features = CCU_FEATURE_KEY_FIELD,
.hw.init = CLK_HW_INIT_PARENTS("gpu0", gpu0_parents,
&ccu_div_ops,
CLK_OPS_PARENT_ENABLE | CLK_SET_RATE_NO_REPARENT),
CLK_OPS_PARENT_ENABLE |
CLK_SET_RATE_NO_REPARENT |
CLK_SET_RATE_PARENT),
},
};

Expand Down
Loading