linux-kernel - Re: [PATCH v2 04/18] MIPS: dts: Add initial support for Intel MIPS SoCs

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Date:   Mon, 6 Aug 2018 17:20:37 +0800
From:   Hua Ma <hua.ma@...ux.intel.com>
To:     Hauke Mehrtens <hauke@...ke-m.de>,
        Songjun Wu <songjun.wu@...ux.intel.com>,
        yixin.zhu@...ux.intel.com, chuanhua.lei@...ux.intel.com,
        qi-ming.wu@...el.com
Cc:     linux-mips@...ux-mips.org, linux-clk@...r.kernel.org,
        linux-serial@...r.kernel.org, devicetree@...r.kernel.org,
        James Hogan <jhogan@...nel.org>, linux-kernel@...r.kernel.org,
        Paul Burton <paul.burton@...s.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ralf Baechle <ralf@...ux-mips.org>
Subject: Re: [PATCH v2 04/18] MIPS: dts: Add initial support for Intel MIPS
 SoCs



On 8/4/2018 7:11 PM, Hauke Mehrtens wrote:
> On 08/03/2018 05:02 AM, Songjun Wu wrote:
>> From: Hua Ma <hua.ma@...ux.intel.com>
>>
>> Add dts files to support Intel MIPS SoCs:
>> - xrx500.dtsi is the chip dts
>> - easy350_anywan.dts is the board dts
>>
>> Signed-off-by: Hua Ma <hua.ma@...ux.intel.com>
>> Signed-off-by: Songjun Wu <songjun.wu@...ux.intel.com>
>> ---
>>
>> Changes in v2:
>> - New patch split from previous patch
>> - The memory address is changed to @20000000
>> - Update to obj-$(CONFIG_BUILTIN_DTB) as per commit fca3aa166422
>>
>>   arch/mips/boot/dts/Makefile                      |  1 +
>>   arch/mips/boot/dts/intel-mips/Makefile           |  4 ++
>>   arch/mips/boot/dts/intel-mips/easy350_anywan.dts | 26 ++++++++++
>>   arch/mips/boot/dts/intel-mips/xrx500.dtsi        | 66 ++++++++++++++++++++++++
>>   4 files changed, 97 insertions(+)
>>   create mode 100644 arch/mips/boot/dts/intel-mips/Makefile
>>   create mode 100644 arch/mips/boot/dts/intel-mips/easy350_anywan.dts
>>   create mode 100644 arch/mips/boot/dts/intel-mips/xrx500.dtsi
>>
>> diff --git a/arch/mips/boot/dts/intel-mips/easy350_anywan.dts b/arch/mips/boot/dts/intel-mips/easy350_anywan.dts
>> new file mode 100644
>> index 000000000000..e5e95f90c5e7
>> --- /dev/null
>> +++ b/arch/mips/boot/dts/intel-mips/easy350_anywan.dts
>> @@ -0,0 +1,26 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/dts-v1/;
>> +
>> +#include <dt-bindings/interrupt-controller/mips-gic.h>
>> +#include <dt-bindings/clock/intel,grx500-clk.h>
>> +
>> +#include "xrx500.dtsi"
>> +
>> +/ {
>> +	model = "EASY350 ANYWAN (GRX350) Main model";
> Main model can be removed, it does not identify the board.
Thanks, will remove.

>> +	compatible = "intel,easy350-anywan";
> I think this should be
> 	compatible = "intel,easy350-anywan", "intel,xrx500";
>
> Are there different revisions of the EASY350 Anywan board or only of the
> EASY550 board?There are at least some differences in the power supply on
> the EASY550 V1 and EASY550 V2 board. I would suggest to be here very
> specific to make it easier when adding more boards.
OK, thanks.

>> +
>> +	aliases {
>> +		serial0 = &asc0;
>> +	};
>> +
>> +	chosen {
>> +		bootargs = "earlycon=lantiq,0x16600000 clk_ignore_unused";
> What happens when you remove clk_ignore_unused?
> If it crashes we should probably define some of the clock to be always
> active.
OK, will check and improve if possible.