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Simple steps used to test the SH-QSPI at U-Boot
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#0, Currently, SH-QSPI is used by lager board (Renesas ARM SoC R8A7790)
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and koelsch board (Renesas ARM SoC R8A7791). These boot from SPI ROM
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basically. Thus, U-Boot start, SH-QSPI will is operating normally.
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#1, build U-Boot and load u-boot.bin
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=> tftpboot 40000000 u-boot.bin
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sh_eth Waiting for PHY auto negotiation to complete.. done
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sh_eth: 100Base/Half
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Using sh_eth device
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TFTP from server 192.168.169.1; our IP address is 192.168.169.79
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Filename 'u-boot.bin'.
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Load address: 0x40000000
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Loading: ############
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2.5 MiB/s
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done
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Bytes transferred = 175364 (2ad04 hex)
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#2, Commands to erase/write u-boot to flash device
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Note: This method is description of the lager board. If you want to use the
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other boards, please change the value according to each environment.
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=> sf probe 0
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SF: Detected S25FL512S_256K with page size 512 Bytes, erase size 64 KiB, total 64 MiB
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=> sf erase 80000 40000
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SF: 262144 bytes @ 0x80000 Erased: OK
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=> sf write 40000000 80000 175364
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SF: 1528676 bytes @ 0x80000 Written: OK
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=>
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#3, Push reset button.
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If you're written correctly and driver works properly, U-Boot starts.
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