Porting U-Boot to a QCA9531 board?

[Richard Thanki]

Hi Heinrich

> On 18 Nov 2020, at 17:27, Heinrich Schuchardt <xypron.debian at gmx.de <mailto:xypron.debian at gmx.de>> wrote:
> 
> 
> The driver will not be compiled because your config does not select
> CONFIG_AG7XXX.

So clear when you point it out. I’ll modify this, and retest, thank you.

> 
>> - With OpenWrt 18.06 (Kernel 4.4 - ar71xx mach target) and 19.07 (kernel 4.14 -
>> ath79 dts target) the boot process doesn't complete and stalls at [link]. With
>> OpenWrt Master (5.4) the boot process completes but the system displays the
>> following issues: -- Within OpenWrt the watchdog timer (usually on GPIO 2)
>> does not respond to writes on sysfs and therefore the device reboots every 4
>> minutes -- The second USB hub on the board is not detected by OpenWrt during
>> boot and therefore some devices do not come up on the operating system such as
>> the modem.
> 
> These seem to be questions about Linux configuration, not U-Boot.

Sorry, I think we phrased this badly. We only get these issues when using mainline U-Boot 
and not a) the manufacturer default bootloader or b) the Pepe2K mod - both of which work 
perfectly with our test images. In each case we’re using the same OpenWrt OS images 
we’ve built ourselves between the tests with these different botloaders.

I guess the deeper understanding we’re trying to get to is the proper relationship between 
bootloader and Linux:

- Why would the very same OpenWrt image be able to find and use the USB hub or make 
use of GPIO 2 using these other two U-Boot variants but not mainline? 
- Does this point to us not performing important set-up steps in U-Boot or does our problem
 lie in our OpenWrt setup? (If the latter, why do these other U-Boots work properly?)
- Are we stumbling into a common beginners’ problem?

Thanks again

Rich


> 
> Cc: Daniel Schwierzeck <daniel.schwierzeck at gmail.com <mailto:daniel.schwierzeck at gmail.com>> (maintainer:MIPS)
> 
> Best regards
> 
> Heinrich
> 
>> 
>> My working config file is here[1], my device tree is here[2], the board file
>> here[3]  and my defconfig can be found here[4].
>> 
>> Am I running into an obvious oversight? What are the next steps I need to take
>> to get my port working?
>> 
>> Thanks,
>> wambui karuga
>> [1] https://github.com/wambu-i/u-boot/blob/getbox/include/configs/get-box.h
>> [2] https://github.com/wambu-i/u-boot/blob/getbox/arch/mips/dts/jangala,get-box.dts
>> [3] https://github.com/wambu-i/u-boot/blob/getbox/board/jangala/get-box/get-box.c
>> [4] https://github.com/wambu-i/u-boot/blob/getbox/configs/get-box_defconfig