From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kumar Gala Subject: Re: Linux-3.14-rc2: Order of serial node compatibles in DTS files. Date: Tue, 11 Feb 2014 16:33:55 -0600 Message-ID: <63AEBD99-AA87-4FD7-BBDA-0CE419959F14@kernel.crashing.org> References: <20140206082635.GA7048@visitor2.iram.es> <20140207101036.GA823@visitor2.iram.es> <20140210110342.GA15806@visitor2.iram.es> <20140211072606.GA26514@visitor2.iram.es> Mime-Version: 1.0 (Mac OS X Mail 7.1 \(1827\)) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Stephen N Chivers Cc: linuxppc-dev-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, Chris Proctor , devicetree , sebastian.hesselbarth-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org List-Id: devicetree@vger.kernel.org On Feb 11, 2014, at 2:57 PM, Stephen N Chivers wrote: > I have been trial booting a 3.14-rc2 kernel for a 85xx platform > (dtbImage). > > After mounting the root filesystem there are no messages from the init > scripts > and the serial console is not available for login. > > In the kernel log messages there is: > > of_serial f1004500.serial: Unknown serial port found, ignored. > > The serial nodes in boards dts file are specified as: > > serial0: serial@4500 { > cell-index = <0>; > device_type = "serial"; > compatible = "fsl,ns16550", "ns16550"; > reg = <0x4500 0x100>; > clock-frequency = <0>; > interrupts = <0x2a 0x2>; > interrupt-parent = <&mpic>; > }; > > Reversing the order of the compatible: > > compatible = "ns16550", "fsl,ns16550"; > > restores the serial console. > > Linux-3.13 does not have this behaviour. > > There are 49 dts files in Linux-3.14-rc2 that have the fsl,ns16550 > compatible first. Hmm, Wondering if this caused the issue: commit 105353145eafb3ea919f5cdeb652a9d8f270228e Author: Sebastian Hesselbarth Date: Tue Dec 3 14:52:00 2013 +0100 OF: base: match each node compatible against all given matches first - k -- 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