Thanks! The uefi firmware was built include ACPI/AML, but current kernel code is not able to extract the info, the ACPI/AML driver of kernel is not enough for majority of devices , but fdt driver is. I think there's a lot of work to support more acpi driver. Best Regards! Wang Honghui ---原始邮件--- 发件人:"Sudeep Holla" 发送时间:2022年11月24日(星期四) 晚上9:46 收件人:"王洪辉"; 主题: [PATCH 3/3] arm_scpi: modify to support acpi On T