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From: "Robert Carnecky (Neopsis)" <robert@neopsis.com>
To: barebox@lists.infradead.org
Subject: Mini UART on RaspberryPi CM3/CM3+
Date: Mon, 5 Oct 2020 12:07:48 +0200	[thread overview]
Message-ID: <CABMENH487jhrwdywh4KOOqvJtJ_r0ZbSMu2ArDZRHhdK==-+wQ@mail.gmail.com> (raw)

Did anybody successfully configured Raspberry CM3/CM3+ mini-UART as
the Barebox console? I found a thread
on this list discussing the issue
(https://www.mail-archive.com/barebox@lists.infradead.org/msg35235.html),
unfortunately without any solution.

What I need:

   * UART0 on pins 32/33 (technology access over rs-485)
   * UART1 (miniUART) on pins 14/15 (console)

My current config.txt boots fine my raspberry kernel (zImage built
using builroot):

   kernel=zImage
   enable_uart=1
   dtoverlay=uart0,txd0_pin=32,rxd0_pin=33,pin_func=7
   dtoverlay=uart1,txd1_pin=14,rxd1_pin=15

Now I would like to switch to Barebox as a bootloader. I compiled the
barebox image with

   * CONSOLE_ACTIVATE_NONE = Y
   * 'stdout-path=&uart1;' in  'arch/arm/dts/bcm2837-rpi-cm3.dts' .

and changed my kernel in config.txt

    kernel=barebox.img

I cannot see any output on pins 14/15 e.g. UART1, no barebox console,
no kernel console.
Any idea what's wrong here?

Robert

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             reply	other threads:[~2020-10-05 10:08 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-05 10:07 Robert Carnecky (Neopsis) [this message]
2020-10-05 11:16 ` Ahmad Fatoum
2020-10-09 12:30   ` Robert Carnecky (Neopsis)
2020-10-09 14:18     ` Ahmad Fatoum
2020-10-17 11:31       ` Robert Carnecky (Neopsis)
2020-10-17 21:29         ` Ahmad Fatoum
2020-10-17 23:17           ` Robert Carnecky (Neopsis)
2020-10-19  9:28             ` Ahmad Fatoum
2020-10-19 22:29               ` Robert Carnecky (Neopsis)
2020-10-20  3:59                 ` Rouven Czerwinski
2020-10-20  4:04                   ` Rouven Czerwinski
2020-10-20 12:22                     ` Robert Carnecky (Neopsis)
2020-10-20 12:45                       ` Rouven Czerwinski
2020-10-20 17:04                         ` Robert Carnecky (Neopsis)
2020-10-21  8:21                           ` Robert Carnecky (Neopsis)

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