cpus node: Make clock-frequency optional#61
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robherring merged 1 commit intodevicetree-org:mainfrom Feb 8, 2023
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Modern CPU implementations overwhelmingly implement frequency scaling,
so there is no real notion of "the current" CPU clock frequency anymore.
Make the "clock-frequency" and "timebase-frequency" property of each CPU
node optional instead of required, and reword the description of the
clock-frequency to only encourage using this property if the CPU speed
is fixed.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
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This is the first step to push a patch removing the warning message from arch/arm Linux kernels. I don't think this property makes sense anymore. arm64 Linux seems to ignore it completely, and arm Linux just computes some capacity value for big.LITTLE systems from it. |
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Modern CPU implementations overwhelmingly implement frequency scaling, so there is no real notion of "the current" CPU clock frequency anymore.
Make the "clock-frequency" and "timebase-frequency" property of each CPU node optional instead of required, and reword the description of the clock-frequency to only encourage using this property if the CPU speed is fixed.
Signed-off-by: Andre Przywara andre.przywara@arm.com