linux-kernel - Re: [PATCH v6 1/2] serial_core: add pci uart early console support

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Message-ID: <55905CC1.7020106@hurleysoftware.com>
Date:	Sun, 28 Jun 2015 16:44:49 -0400
From:	Peter Hurley <peter@...leysoftware.com>
To:	Bin Gao <bin.gao@...ux.intel.com>
CC:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Jiri Slaby <jslaby@...e.cz>, Paul Bolle <pebolle@...cali.nl>,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 1/2] serial_core: add pci uart early console support

On 06/08/2015 02:17 PM, Bin Gao wrote:
> On some Intel Atom SoCs, the legacy IO port UART(0x3F8) is not available.
> Instead, a 8250 compatible PCI uart can be used as early console.
> This patch adds pci support to the 8250 early console driver uart8250.
> For example, to enable pci uart(00:21.3) as early console on these
> platforms, append the following line to the kernel command line
> (assume baud rate is 115200):
> earlyprintk=uart8250,pci32,0:24.2,115200n8

Reviewed-by: Peter Hurley <peter@...leysoftware.com>


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