From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Hurley Subject: Re: Which is better to specify console, "console= " or "stdout-path" ? Date: Wed, 21 Oct 2015 08:46:09 -0400 Message-ID: <56278911.9050704@hurleysoftware.com> References: <562753A6.3070107@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <562753A6.3070107-5wv7dgnIgG8@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Sudeep Holla , Masahiro Yamada , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel , linux-serial-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org On 10/21/2015 04:58 AM, Sudeep Holla wrote: > On 21/10/15 06:09, Masahiro Yamada wrote: >> I think there exist two ways to specify the console port and baudrate. >> >> >> [1] Specify console in bootargs >> >> chosen { >> bootargs = "console=ttyS0,115200"; >> }; >> >> >> [2] Specify stdout-path >> >> chosen { >> stdout-path = "serial0:115200n8"; > > This will work for even early/boot console, so this is better than > option [1] Be aware that options specified via /chosen/stdout-path are currently ignored by earlycon. There were some hiccups getting the initial support upstream; when 4.4 hits mainline, I'll resubmit my series that implements the of_serial i/o properties and options passthrough to earlycon setup. Regards, Peter Hurley -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html