2016-12-01 10:34 GMT+01:00 Mirza Krak <mirza.k...@gmail.com>: > 2016-11-30 19:07 GMT+01:00 Stephen Warren <swar...@wwwdotorg.org>: >> On 11/29/2016 11:47 PM, Mirza Krak wrote: >>> >>> 2016-11-30 5:05 GMT+01:00 Stephen Warren <swar...@wwwdotorg.org>: >>>> >>>> On 11/27/2016 11:05 PM, Mirza Krak wrote: >>>>> >>>>> >>>>> From: Mirza Krak <mirza.k...@gmail.com> >>>>> >>>>> Recently the default UART clock rate has been changed to 48 MHz on all >>>>> pi`s in the firmware files, which broke UART support in u-boot. >>>>> >>>>> Align configuration to boot firmware. >>>> >>>> >>>> >>>>> diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c >>>> >>>> >>>> >>>>> @@ -37,7 +37,7 @@ static const struct pl01x_serial_platdata >>>>> serial_platdata = { >>>>> .base = 0x20201000, >>>>> #endif >>>>> .type = TYPE_PL011, >>>>> - .clock = 3000000, >>>>> + .clock = 48000000, >> >> >> Now that I look into this some more, I will point out that this code doesn't >> even exist in the latest U-Boot, so your patch doesn't apply. > > Yes, my bad. I am on 2016.03. Looking in upstream code I can see that > some changes have been made regarding this. > >> >> Instead, the UART is now instantiated from DT:-( Presumably the UART drivers >> attempt to dynamically query the clock rate from the clock provider >> described in DT, yet since there is no such provider implemented in U-Boot, >> this must currently fail, and I presume that if U-Boot still works at all on >> the Pi, then the UART drivers must simply skip programming the divider at >> all, and thus rely on the FW having initialized it. > > From what I see it no longer tries to initialize the UART on RPi at > all and does rely on the FW having initialized it, which seems to be > intentional. See [1]. > >> >> Does updating to the latest U-Boot code solve your problem? > > Will give it a go, but probably solves my problems.
Did a test run on 2016.11 U-boot and works like a charm. Best Regards Mirza _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot