Re: [RFC PATCH] always probe UART HW when options are not specified

From	Mason <slash.tmp@free.fr>
Newsgroups	linux.kernel
Subject	Re: [RFC PATCH] always probe UART HW when options are not specified
Date	2016-01-12 10:40 +0100
Message-ID	<qQ3AK-7rn-23@gated-at.bofh.it> (permalink)
References	(9 earlier) <qIzo5-70P-5@gated-at.bofh.it> <qPMgy-434-29@gated-at.bofh.it> <qPNmh-4Mf-7@gated-at.bofh.it> <qPOV5-5Iz-7@gated-at.bofh.it> <qPQ0O-6AV-21@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 11/01/2016 20:06, Peter Hurley wrote:

> I don't have enough information to suggest what you "should" use
> here.
> 
> Is this going to be a shipping product?
> Is it single-core?
> etc.
> 
> And what is your purpose for outputting early boot information
> before loading the serial driver which does provide console output?

I'm not sure exactly which board Sebastian has in mind, but I've been
using the SERIAL_8250_RT288X driver on my Tango4 board.

Note: calling the UART driver "Au1x00/RT288x" is a bit of a misnomer,
as these are names of SoCs using that distinct register layout.
The actual IP is probably the 16550-compatible Palmchip BK-3103.
https://sites.google.com/a/palmchiptech.com/palmchiptech/product-services/hardware-services/ip-cores/bk-3103
(Not sure that this website is legitimate, though.)

When I need earlyprintk support, I use this patch from Mans:
http://thread.gmane.org/gmane.linux.kernel/2081016

Regards.

Thread

Re: [RFC PATCH] always probe UART HW when options are not specified Sebastian Frias <sf84@laposte.net> - 2016-01-11 16:10 +0100
  Re: [RFC PATCH] always probe UART HW when options are not specified Peter Hurley <peter@hurleysoftware.com> - 2016-01-11 17:20 +0100
    Re: [RFC PATCH] always probe UART HW when options are not specified Sebastian Frias <sf84@laposte.net> - 2016-01-11 19:00 +0100
      Re: [RFC PATCH] always probe UART HW when options are not specified Peter Hurley <peter@hurleysoftware.com> - 2016-01-11 20:10 +0100
        Re: [RFC PATCH] always probe UART HW when options are not specified Peter Hurley <peter@hurleysoftware.com> - 2016-01-11 21:00 +0100
          Re: [RFC PATCH] always probe UART HW when options are not specified Peter Hurley <peter@hurleysoftware.com> - 2016-01-11 21:30 +0100
        Re: [RFC PATCH] always probe UART HW when options are not specified Mason <slash.tmp@free.fr> - 2016-01-12 10:40 +0100
          Re: [RFC PATCH] always probe UART HW when options are not specified Sebastian Frias <sf84@laposte.net> - 2016-01-12 15:30 +0100
            Re: [RFC PATCH] always probe UART HW when options are not specified Peter Hurley <peter@hurleysoftware.com> - 2016-01-12 20:50 +0100
              Re: [RFC PATCH] always probe UART HW when options are not specified Mason <slash.tmp@free.fr> - 2016-01-12 23:30 +0100
                Re: [RFC PATCH] always probe UART HW when options are not specified Peter Hurley <peter@hurleysoftware.com> - 2016-01-12 23:50 +0100
              Re: [RFC PATCH] always probe UART HW when options are not specified Sebastian Frias <sf84@laposte.net> - 2016-01-13 12:20 +0100
                Re: [RFC PATCH] always probe UART HW when options are not specified Peter Hurley <peter@hurleysoftware.com> - 2016-01-13 17:40 +0100
        Re: [RFC PATCH] always probe UART HW when options are not specified Sebastian Frias <sf84@laposte.net> - 2016-01-12 15:20 +0100
          Re: [RFC PATCH] always probe UART HW when options are not specified Peter Hurley <peter@hurleysoftware.com> - 2016-01-12 22:20 +0100

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