Hi! On Tue, Jun 25, 2019 at 5:23 PM Christian Lamparter <[email protected]> wrote: > Is 10MHz even a supported frequency for the SPI-NOR chip?
It is supported. It's just unnecessarily slow. Mediatek uses 30MHz in their SDK and all my boards works fine with 40MHz. > > I think you can measure the time it takes to read the SPI-NOR and check > if the KiB/s match with the selected frequency or not. Did a quick test on my router with 40MHz SPI clock: # time dd if=/dev/mtdblock3 of=/dev/null bs=64k 251+0 records in 251+0 records out real 0m 4.98s user 0m 0.00s sys 0m 0.16s around 25Mbit/s Regards, Chuanhong Guo _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/mailman/listinfo/openwrt-devel
