linux-kernel - Re: [PATCH 2/2] arm64: dts: sdm845: Add serial console support

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Date:   Tue, 6 Feb 2018 14:36:10 -0600
From:   Rob Herring <robh@...nel.org>
To:     Stephen Boyd <sboyd@...eaurora.org>
Cc:     Rajendra Nayak <rnayak@...eaurora.org>,
        Andy Gross <andy.gross@...aro.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: dts: sdm845: Add serial console support

On Fri, Jan 26, 2018 at 4:18 PM, Stephen Boyd <sboyd@...eaurora.org> wrote:
> On 01/25, Rajendra Nayak wrote:
>> diff --git a/arch/arm64/boot/dts/qcom/sdm845-pins.dtsi b/arch/arm64/boot/dts/qcom/sdm845-pins.dtsi
>> new file mode 100644
>> index 000000000000..b97f99e6f4b4
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/qcom/sdm845-pins.dtsi
>> @@ -0,0 +1,32 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Copyright (c) 2018, The Linux Foundation. All rights reserved.
>> + */
>> +
>> +&tlmm {
>
> I'm not the maintainer, but I find this approach to the pins
> really annoying. I have to flip to another file to figure out how
> a board has configured the pins. And we may bring in a bunch of
> settings that we don't ever use on some board too. Why can't we
> put the settings in the board file directly?

FYI, there's a pending dtc change to allow deleting unreferenced nodes
which can solve the bloat problem.

Rob