ZYNQ 中设置支持 QSPI Dual Stacked Flash 硬件：zynq7020,板子上有两片 s25fl512s flash，每片 64MB, 采用 dual stacked 方式连接。 软件: petalinux2018.03 project-spec/meta-user/recipes-bsp/device-tree/files/system-user.dtsi 改动如下： &qspi { is-dual = <0>; is-stacked = <1>; num-cs = <2>; spi-rx-bus-width = <4>; spi-tx-bus-width = <4>; status = "okay"; flash0: flash@0 { compatible = "s25fl512s"; reg = <0x0>; #address-cells = <1>; #size-cells = <1>; spi-max-frequency = <50000000>; }; }; 这里， is-dual：如果是 dual parallel 方式，为 1，其他为 0 is-stacked: uboot 里面会检测，kernel 里不看这个标志。 num-cs: 设置 cs 的数目 后面默认位宽是 4bit Kernel menuconfig 改动，相当于设置了 is-stacked 标志 Device Drivers ---> [*] SPI support ---> <*> <*> [*] Xilinx SPI controller common module Xilinx Zynq QSPI controller Xilinx Zynq QSPI Dual stacked configuration 效果如下 Hit any key to stop autoboot: 0 #sf probe spi_flash_scan, dual_flash:1 SF: Detected s25fl512s_256k with page size 512 Bytes, erase size 256 KiB, total 128 MiB 其他可以参考官网说明 https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18842262/Zynq+QSPI+Driver