difos/target
David Bentham 17e690017d ramips: reduce spi-max-frequency for Xiaomi MI Router 4AG
Reduce spi-max-frequency for Xiaomi MI Router 4AG model

Xiaomi MI Router 4AG MTD uses two flash chips (no specific on router versions when produced from factory) - GD25Q128C and W25Q128BV.

These flash chips are capable of high frequency, but due to poor board design or manufacture process.

We are seeing the following errors in the linux kernel bootup:

`spi-nor spi0.0: unrecognized JEDEC id bytes: cc 60 1c cc 60 1c
 spi-nor: probe of spi0.0 failed with error -2`

This causes the partitions not to be detected

`VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6`

Then creates a bootloop and a bricked router.

The solution to limit this race condition is to reduce the frequency from 80 mhz to 50 mhz.

Signed-off-by: David Bentham <db260179@gmail.com>
2021-04-17 21:56:05 +02:00
..
imagebuilder build,ib: add STRIP_ABI option for manifest 2021-03-16 11:00:08 -10:00
linux ramips: reduce spi-max-frequency for Xiaomi MI Router 4AG 2021-04-17 21:56:05 +02:00
sdk sdk: expose binary strip settings 2021-02-20 01:29:36 +01:00
toolchain target: fix copying of licenses for SDK/toolchain 2021-02-14 21:56:29 +01:00
Config.in include/image*: add support for device-tree overlays 2021-03-17 17:45:34 +00:00
Makefile build: make <subdir>/install opt-in, use it for target/ only 2017-02-09 13:51:35 +01:00