1------------------------------------------------- 2 Simple steps used to test the SH-QSPI at U-Boot 3------------------------------------------------- 4 5#0, Currently, SH-QSPI is used by lager board (Renesas ARM SoC R8A7790) 6 and koelsch board (Renesas ARM SoC R8A7791). These boot from SPI ROM 7 basically. Thus, U-Boot start, SH-QSPI will is operating normally. 8 9#1, build U-Boot and load u-boot.bin 10 11 => tftpboot 40000000 u-boot.bin 12 sh_eth Waiting for PHY auto negotiation to complete.. done 13 sh_eth: 100Base/Half 14 Using sh_eth device 15 TFTP from server 192.168.169.1; our IP address is 192.168.169.79 16 Filename 'u-boot.bin'. 17 Load address: 0x40000000 18 Loading: ############ 19 2.5 MiB/s 20 done 21 Bytes transferred = 175364 (2ad04 hex) 22 23#2, Commands to erase/write u-boot to flash device 24 25 Note: This method is description of the lager board. If you want to use the 26 other boards, please change the value according to each environment. 27 28 => sf probe 0 29 SF: Detected S25FL512S_256K with page size 512 Bytes, erase size 64 KiB, total 64 MiB 30 => sf erase 80000 40000 31 SF: 262144 bytes @ 0x80000 Erased: OK 32 => sf write 40000000 80000 175364 33 SF: 1528676 bytes @ 0x80000 Written: OK 34 => 35 36#3, Push reset button. 37 38 If you're written correctly and driver works properly, U-Boot starts. 39