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/openbmc/linux/arch/arm64/boot/dts/hisilicon/ |
H A D | hi3660.dtsi | 928c4a5c Mon Jan 08 22:32:42 CST 2018 Leo Yan <leo.yan@linaro.org> arm64: dts: Hi3660: Remove 'CPU_NAP' idle state
Thanks a lot for Vincent Guittot careful work to find bug for 'CPU_NAP' idle state. At early time, the CPU CA73 CPU_NAP idle state has been supported on Hikey960. Later we found the system has the hang issue and for resolving this issue Hisilicon released new MCU firmware, but unfortunately the new MCU firmware has side effect and results in the CA73 CPU cannot really enter CPU_NAP state and roll back to WFI state.
After discussion we cannot see the possibility to enable CA73 CPU_NAP state anymore on Hikey960, based on this conclusion we should remove this state from DT binding.
Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Kevin Wang <jean.wangtao@linaro.org> Cc: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Tested-by: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Wei Xu <xuwei5@hisilicon.com> 928c4a5c Mon Jan 08 22:32:42 CST 2018 Leo Yan <leo.yan@linaro.org> arm64: dts: Hi3660: Remove 'CPU_NAP' idle state Thanks a lot for Vincent Guittot careful work to find bug for 'CPU_NAP' idle state. At early time, the CPU CA73 CPU_NAP idle state has been supported on Hikey960. Later we found the system has the hang issue and for resolving this issue Hisilicon released new MCU firmware, but unfortunately the new MCU firmware has side effect and results in the CA73 CPU cannot really enter CPU_NAP state and roll back to WFI state. After discussion we cannot see the possibility to enable CA73 CPU_NAP state anymore on Hikey960, based on this conclusion we should remove this state from DT binding. Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Kevin Wang <jean.wangtao@linaro.org> Cc: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Tested-by: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Wei Xu <xuwei5@hisilicon.com>
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