From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Schwebel Subject: earlycon: no match? Date: Sun, 3 May 2015 23:10:54 +0200 Message-ID: <20150503211054.GR15254@pengutronix.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org To: Peter Hurley Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de List-Id: linux-serial@vger.kernel.org Hi Peter, with 4.1-rc1, my boxes with early console enabled show something like this (the example is vexpress, but it for example also happens on an AM335x board): earlycon: no match for ttyAMA0,38400n8 The box was booted with "console=ttyAMA0,38400n8" on the commandline. If I understand this right, the code in drivers/tty/serial/earlycon.c calls setup_earlycon() with the string above ("ttyAMA0,38400n8") and fails to find that string in the "names" part of the __earlycon_table, because for the pl011 component on vexpress, the early console was registered in drivers/tty/serial/amba-pl011.c with: OF_EARLYCON_DECLARE(pl011, "arm,pl011", pl011_early_console_setup); ^^^^^ name So isn't that trying to match "ttyAMA0" against "arm,pl011"? I have the feeling that I didn't understand the logic behind that. Can you elaborate about how this is supposed to work correctly? Thanks, rsc -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |