driver-api/mtd/spi-nor.rst

33 1) Specify the controller that you used to test the flash and specify
41     root@1:~# cat /sys/bus/spi/devices/spi0.0/spi-nor/partname
43     root@1:~# cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
45     root@1:~# cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
47     root@1:~# xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
51     1d81ed0f773830b030b0f7ffffff29c25cfff030c080ffffffffffffffff
69     root@1:~# sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
79     root@1:~# cat /sys/kernel/debug/spi-nor/spi0.0/capabilities
81      1S-1S-1S
85      1S-1S-1S (fast read)
89      1S-1S-2S
93      1S-2S-2S
97      1S-1S-4S
101      1S-4S-4S
111      1S-1S-1S
114     root@1:~# cat /sys/kernel/debug/spi-nor/spi0.0/params
118     write size		1
131      read		1S-4S-4S
132      write		1S-1S-1S
133      register		1S-1S-1S
136      20 (4.00 KiB) [0]
137      d8 (8.00 KiB) [1]
138      d8 (32.0 KiB) [2]
139      d8 (64.0 KiB) [3]
154     root@1:~# dd if=/dev/urandom of=./spi_test bs=1M count=2
159     root@1:~# mtd_debug erase /dev/mtd0 0 2097152
162     root@1:~# mtd_debug read /dev/mtd0 0 2097152 spi_read
165     root@1:~# hexdump spi_read
170     root@1:~# sha256sum spi_read
173     root@1:~# mtd_debug write /dev/mtd0 0 2097152 spi_test
176     root@1:~# mtd_debug read /dev/mtd0 0 2097152 spi_read
179     root@1:~# sha256sum spi*
186     root@1:~# mtd_debug erase /dev/mtd0 0 2097152
189     root@1:~# mtd_debug read /dev/mtd0 0 2097152 spi_read
192     root@1:~# sha256sum spi*
198     root@1:~# mtd_debug info /dev/mtd0
203     mtd.writesize = 1