[OpenWrt-Devel] raspberry pi v3.19
Álvaro Fernández Rojas
noltari at gmail.com
Tue Feb 10 05:09:09 EST 2015
The pins you said are the right ones. However, if anything fails before the kernel is booted you won't get any output. You could try booting a 3.14 image and check if you are properly connected to the uart.
It may be some wrong configuration related to the recently added DT support, which expects a DTB and since no DTB is passed from the bootloader, the kernel crashes before any output.
> El 10/2/2015, a las 6:29, John Crispin <blogic at openwrt.org> escribió:
> ok, so uart, how do you connect it ?
>> On 10/02/2015 02:02, Álvaro Fernández Rojas wrote:
>> I tried adding support for 3.18 and I have issues booting the raspberry. There must be something wrong with the new mmc driver, because it detects the SD card insertions/extractiones, but doesn't read the partitions:
>> My patches:
>>> El 09/02/2015 a las 18:12, Florian Fainelli escribió:
>>>> On Feb 9, 2015 4:25 AM, "John Crispin" <blogic at openwrt.org <mailto:blogic at openwrt.org>> wrote:
>>>> i synced our rpi port with the upstream tree on github. it boots and i
>>>> can see the coloured palette test pic on the hdmi, however ethernet
>>>> fails to come up. i attached a uart just to find out that my rpi is
>>>> either broken or i am connecting it wrong.
>>>> has anyone managed to get uart working ? to my understanding i need to
>>>> connect pin6 to gnd and use 8 and 10 for the 2 data lines. should i see
>>>> output from the bootloader prior to board detecting/loading the sd card
>>> You will not get any UART output prior to the kernel boot, the GPU boot code does not output anything (at least not in the builds we use).
>>> Could you share the boot log to see if there is anything obvious?
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