openwrt/target
Adrian Schmutzler 30cc7f3510 ramips: increase SPI frequency for ASUS RT-AC51U/RT-AC54U
This increases the SPI frequency for both ASUS RT-AC51U and RT-AC54U.

Speed comparison tests have been performed on RT-AC54U:

- 10Mhz
root@OpenWrt:~# time cat /dev/mtd* > /dev/null
real    4m 37.78s
user    0m 0.02s
sys     2m 43.92s

- 50Mhz
root@OpenWrt:~# time cat /dev/mtd* > /dev/null
real    1m 28.34s
user    0m 0.03s
sys     0m 46.96s

- 50Mhz fast read
root@OpenWrt:~# time cat /dev/mtd* > /dev/null
real    1m 11.94s
user    0m 0.01s
sys     0m 46.94s

- 80Mhz
root@OpenWrt:~# time cat /dev/mtd* > /dev/null
real    1m 12.31s
user    0m 0.04s
sys     0m 46.96s

- 80Mhz fast read
root@OpenWrt:~# time cat /dev/mtd* > /dev/null
real    1m 12.15s
user    0m 0.02s
sys     0m 46.97s

Based on that, we took 50 MHz with fast-read, as higher frequencies
didn't yield further improvements.

For the RT-AC51U, only the final configuration was tested.

Tested-by: Zhijun You <hujy652@gmail.com> [RT-AC54U]
Tested-by: Davide Fioravanti <pantanastyle@gmail.com> [RT-AC51U]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-05-18 11:38:22 +02:00
..
imagebuilder build: refactor JSON info files to profiles.json 2020-04-03 12:17:45 +02:00
linux ramips: increase SPI frequency for ASUS RT-AC51U/RT-AC54U 2020-05-18 11:38:22 +02:00
sdk sdk: use bundle-libraries.sh to ship kernel objtool tools 2019-09-03 10:45:25 +02:00
toolchain toolchain: wrapper.sh: harmonize leading whitespaces 2019-12-31 01:36:16 +01:00
Config.in build: define RTC_SUPPORT as a bool 2020-04-09 12:51:10 +02:00
Makefile build: make <subdir>/install opt-in, use it for target/ only 2017-02-09 13:51:35 +01:00