linux-kernel - Re: [PATCH 3/4] arm64: dts: qcom: msm8998: Add SDC2 control pins

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Date:   Thu, 15 Nov 2018 13:15:14 -0700
From:   Jeffrey Hugo <jhugo@...eaurora.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     andy.gross@...aro.org, david.brown@...aro.org, robh+dt@...nel.org,
        mark.rutland@....com, linux-arm-msm@...r.kernel.org,
        linux-soc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] arm64: dts: qcom: msm8998: Add SDC2 control pins

On 11/15/2018 12:16 PM, Bjorn Andersson wrote:
> On Thu 15 Nov 09:18 PST 2018, Jeffrey Hugo wrote:
> 
>> The SDC2 control pins are typically used to manage sleep.
>>
>> Signed-off-by: Jeffrey Hugo <jhugo@...eaurora.org>
>> ---
>>   arch/arm64/boot/dts/qcom/msm8998-pins.dtsi | 78 ++++++++++++++++++++++++++++++
> 
> Rather than adding a -pins file, add the pinctrl states the individual
> dts(i) directly.
> 
>>   arch/arm64/boot/dts/qcom/msm8998.dtsi      |  2 +
>>   2 files changed, 80 insertions(+)
>>   create mode 100644 arch/arm64/boot/dts/qcom/msm8998-pins.dtsi
>>
>> diff --git a/arch/arm64/boot/dts/qcom/msm8998-pins.dtsi b/arch/arm64/boot/dts/qcom/msm8998-pins.dtsi
>> new file mode 100644
>> index 0000000..a22abf9
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/qcom/msm8998-pins.dtsi
>> @@ -0,0 +1,78 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/* Copyright (c) 2018, The Linux Foundation. All rights reserved. */
>> +
>> +&tlmm {
>> +	sdc2_clk_on: sdc2_clk_on {
> 
> Use _ in labels, - in node names.
> 
>> +		config {
> 
> You don't have to put the pinctrl state properties in an additional
> subnode anymore, so feel free to remove the extra subnode level.
> 
>> +			pins = "sdc2_clk";
>> +			bias-disable;           /* NO pull */
>> +			drive-strength = <16>;  /* 16 MA */
> 
> Please push electrical properties to the board dts instead of the
> platform one, as they might be board specific.
> 
>> +		};
>> +	};
> 
> Apart from this the patch loogs good.
> 

Thanks for the guidance.  This all makes sense to me.  I'll roll this 
all into v2.

-- 
Jeffrey Hugo
Qualcomm Datacenter Technologies as an affiliate of Qualcomm 
Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.