From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Wu, Songjun" <songjun.wu@linux.intel.com>
Subject: Re: [PATCH 1/7] MIPS: dts: Add aliases node for lantiq danube serial
Date: Mon, 18 Jun 2018 17:42:14 +0800
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To: Arnd Bergmann <arnd@arndb.de>
Cc: hua.ma@linux.intel.com, yixin.zhu@linux.intel.com, chuanhua.lei@intel.com, "open list:RALINK MIPS ARCHITECTURE" <linux-mips@linux-mips.org>, qi-ming.wu@intel.com, linux-clk <linux-clk@vger.kernel.org>, linux-serial@vger.kernel.org, DTML <devicetree@vger.kernel.org>, James Hogan <jhogan@kernel.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Thomas Gleixner <tglx@linutronix.de>, Philippe Ombredanne <pombredanne@nexb.com>, Rob Herring <robh+dt@kernel.org>, Kate Stewart <kstewart@linuxfoundation.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Mark Rutland <mark.rutland@arm.com>, Ralf Baechle <ralf@linux-mips.org>
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On 6/14/2018 6:03 PM, Arnd Bergmann wrote:
> On Tue, Jun 12, 2018 at 7:40 AM, Songjun Wu <songjun.wu@linux.intel.com> wrote:
>> Previous implementation uses a hard-coded register value to check if
>> the current serial entity is the console entity.
>> Now the lantiq serial driver uses the aliases for the index of the
>> serial port.
>> The lantiq danube serial dts are updated with aliases to support this.
>>
>> Signed-off-by: Songjun Wu <songjun.wu@linux.intel.com>
>> ---
>>
>>   arch/mips/boot/dts/lantiq/danube.dtsi | 6 +++++-
>>   1 file changed, 5 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/mips/boot/dts/lantiq/danube.dtsi b/arch/mips/boot/dts/lantiq/danube.dtsi
>> index 2dd950181f8a..7a9e15da6bd0 100644
>> --- a/arch/mips/boot/dts/lantiq/danube.dtsi
>> +++ b/arch/mips/boot/dts/lantiq/danube.dtsi
>> @@ -4,6 +4,10 @@
>>          #size-cells = <1>;
>>          compatible = "lantiq,xway", "lantiq,danube";
>>
>> +       aliases {
>> +               serial0 = &asc1;
>> +       };
>> +
> You generally want the aliases to be part of the board specific file,
> not every board numbers their serial ports in the same way.
>
>         Arnd
In this chip only asc1 can be used as console,  so serial0 is defined in 
chip specific file.