I got following warning message from the kernel a few times per hours at random during operation.
PU: Power-on latency exceeded, new value 64083334 ns
The "new value" varies each time. I don't think it would be a big problem, but I want to get rid of it in the first place thinking by giving proper initial value.
The chipset is iMX6Q and the dts have like below.
gpc: gpc@020dc000 {
compatible = "fsl,imx6q-gpc";
reg = <0x020dc000 0x4000>;
interrupts = <0 89 IRQ_TYPE_LEVEL_HIGH>,
<0 90 IRQ_TYPE_LEVEL_HIGH>;
pu-supply = <®_pu>;
clocks = <&clks IMX6QDL_CLK_GPU3D_CORE>,
<&clks IMX6QDL_CLK_GPU3D_SHADER>,
<&clks IMX6QDL_CLK_GPU2D_CORE>,
<&clks IMX6QDL_CLK_GPU2D_AXI>,
<&clks IMX6QDL_CLK_OPENVG_AXI>,
<&clks IMX6QDL_CLK_VPU_AXI>;
#power-domain-cells = <1>;
};
Is there any way to get rid of the message?
Hi James
one can try below patch
[PATCH v2 4/7] ARM: imx6: gpc: Add observed worst case latencies -- Linux Device Tree
Best regards
igor
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Hi igor,
Thank you for the reply.
But the patch was a bit old, so I can't use for my 3.14.28 kernel.
I assume this warning message is not critical because my application is working for now.
But if you find any other sugguestion, it would be appreciated.
James.