Hi Bruce, I’m just guessing here, but if you can find an A20 board that is similar to the Olimex one you should be able to modify the DTS file so that the pin mapping is correct for your board. You will need the schematics to find which output pins on the CPU are routed to which peripheral.
If you find a good source for learning DTS files I’d like to see it – They are still a bit of a mystery to me as well. Cheers, Paul. From: [email protected] [mailto:[email protected]] On Behalf Of bruce bushby Sent: Thursday, 26 June 2014 8:34 AM To: [email protected] Subject: Re: [linux-sunxi] Re: Booting mainline on a20-olinuxino/cubietruck Hi Maxime Nope... didn't think about damaging the board..... I have absolutely no idea what I'm doing :) ...it's just a hobby and I figured the only way to learn is to try.....you really don't want to watch me connecting the breadboard LOL I try and avoid constantly asking junior questions so tend to exhaust all sense before asking for help....progress is slow but I'm learning. Know any good books that explain how to write dts files? "....We're not ignoring it, we just don't have that hardware..." ..... Would you like one? On Wednesday, 25 June 2014 22:20:15 UTC+1, Maxime Ripard wrote: On Wed, Jun 25, 2014 at 09:37:59PM +0100, bruce bushby wrote: > Doesn't help....which suggests I'm doing something fundamentally wrong. > > bootargs=console=ttyS0,115200 loglevel=9 earlyprintk > > In my defconfig I have: > CONFIG_PRINTK_TIME=y > CONFIG_EARLY_PRINTK=y > CONFIG_DEBUG_LL=y > CONFIG_DEBUG_FS=y > > The board I'm using in A20-SOM-EVB ...which was only released in May and is > not yet supported ...hence all my issues with uboot (no network) and "dtb" > > Compiling uboot for "cubietruck" allows me to ping and tftp load my > uImage....but it gets to Starting Kernel...... and thats it. I suspect > thats because ttyS0 is not correctly defined in the dtb I'm using. You do realise you could physically damage your board doing so, right? Please, have an idea of what you are doing, ask for help before doing anything stupid, or do nothing, but don't do that kind of thing. > I'll ask if anybody has started using these boards....can't imagine the > community will ignore them for long. Thanks again for all your help, much > appreciated!!!! As you've seen, there's no support for this. We're not ignoring it, we just don't have that hardware. So either you wait, or you learn how to do it properly and do so. But just doing that kind of thing isn't going to work. Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]<mailto:[email protected]>. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
