The approach is passed the test and verification on FT2004 DEV board. Thank you for your detailed analysis. I'll try again. Best Regards! ------------------ Wang Honghui ---原始邮件--- 发件人:"Krzysztof Kozlowski"<krzysztof.kozlowski@xxxxxxxxxx> 发送时间:2022年12月2日(星期五) 下午4:50 收件人:"Wang Honghui"<honghui.wang@xxxxxxxxxxx>;"Catalin Marinas"<catalin.marinas@xxxxxxx>;"Will Deacon"<will@xxxxxxxxxx>;"Arnd Bergmann"<arnd@xxxxxxxx>;"Olof Johansson"<olof@xxxxxxxxx>;"soc"<soc@xxxxxxxxxx>;"Rob Herring"<robh+dt@xxxxxxxxxx>;"Krzysztof Kozlowski"<krzysztof.kozlowski+dt@xxxxxxxxxx>;"Sudeep Holla"<sudeep.holla@xxxxxxx>;"Cristian Marussi"<cristian.marussi@xxxxxxx>;"linux-arm-kernel"<linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>;"linux-kernel"<linux-kernel@xxxxxxxxxxxxxxx>;"devicetree"<devicetree@xxxxxxxxxxxxxxx>; 主题: [PATCH] arm64/boot/dts and arm_scpi: add to support Phytium FT2004 CPU On 0