1-------------------------------------------------
2   Simple steps used to test the SH-QSPI at U-Boot
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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