linux-kernel - Re: [PATCH 09/15] ARM: dts: ipq4019: Add qcom-ipq4019-ap.dk04.1-c3 board file

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Date:   Tue, 6 Feb 2018 11:57:16 +0530
From:   Sricharan R <sricharan@...eaurora.org>
To:     Abhishek Sahu <absahu@...eaurora.org>
Cc:     mark.rutland@....com, robh@...nel.org, devicetree@...r.kernel.org,
        catalin.marinas@....com, will.deacon@....com,
        linux@...linux.org.uk, bjorn.andersson@...aro.org,
        david.brown@...aro.org, robh+dt@...nel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, andy.gross@...aro.org,
        linux-arm-msm-owner@...r.kernel.org, linux-soc@...r.kernel.org,
        sboyd@...eaurora.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/15] ARM: dts: ipq4019: Add qcom-ipq4019-ap.dk04.1-c3
 board file

Hi Abhishek,

On 2/3/2018 5:07 PM, Abhishek Sahu wrote:
> On 2018-01-29 10:41, Sricharan R wrote:
>> Signed-off-by: Sricharan R <sricharan@...eaurora.org>
>> ---
>>  arch/arm/boot/dts/Makefile                      |  1 +
>>  arch/arm/boot/dts/qcom-ipq4019-ap.dk04.1-c3.dts | 14 ++++++++++++++
>>  2 files changed, 15 insertions(+)
>>  create mode 100644 arch/arm/boot/dts/qcom-ipq4019-ap.dk04.1-c3.dts
>>
>> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
>> index 68e4b15..0104ba2 100644
>> --- a/arch/arm/boot/dts/Makefile
>> +++ b/arch/arm/boot/dts/Makefile
>> @@ -727,6 +727,7 @@ dtb-$(CONFIG_ARCH_QCOM) += \
>>      qcom-ipq4019-ap.dk01.1-c2.dtb \
>>      qcom-ipq4019-ap.dk04.1-c1.dtb \
>>      qcom-ipq4019-ap.dk04.1-c5.dtb \
>> +    qcom-ipq4019-ap.dk04.1-c3.dtb \
>>      qcom-ipq8064-ap148.dtb \
>>      qcom-msm8660-surf.dtb \
>>      qcom-msm8960-cdp.dtb \
>> diff --git a/arch/arm/boot/dts/qcom-ipq4019-ap.dk04.1-c3.dts
>> b/arch/arm/boot/dts/qcom-ipq4019-ap.dk04.1-c3.dts
>> new file mode 100644
>> index 0000000..7a93fc4
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/qcom-ipq4019-ap.dk04.1-c3.dts
>> @@ -0,0 +1,14 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +// Copyright (c) 2017, The Linux Foundation. All rights reserved.
>> +
>> +#include "qcom-ipq4019-ap.dk04.1.dtsi"
>> +
>> +/ {
>> +    model = "Qualcomm Technologies, Inc. IPQ4019/AP-DK04.1-C3";
>> +
>> +    soc {
>> +        nand: qpic-nand@...0000 {
>> +            status = "disabled";
>> +        };
> 
>  Normally we need to disable in base dtsi and enable in
>  board dtsi so that base dtsi will always work in all the
>  boards. Now If We load the base dtsi in any DK04 board
>  other than C1, then nand failure will come.

 Hmm, qpic nand is not there only on C3 and available in rest
 of dk04-c* variants. So it should work, downstream also
 does it in same way. Anyways, from a readability point, feel that
 better to make these uncommon configurations in each board file
 specifically rather than putting in common file and changing like this.

Regards,
 Sricharan


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