linux-kernel - Re: [PATCH V2 6/7] arm64: dts: Add ipq6018 SoC and CP01 board support

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Message-ID: <960d2f8b-800c-10ee-896e-f04d0e680e1a@codeaurora.org>
Date:   Mon, 30 Dec 2019 14:40:05 +0530
From:   Sricharan R <sricharan@...eaurora.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     devicetree@...r.kernel.org, sboyd@...nel.org,
        linux-arm-msm@...r.kernel.org, linus.walleij@...aro.org,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        linux-gpio@...r.kernel.org, agross@...nel.org,
        sivaprak@...eaurora.org, linux-soc@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH V2 6/7] arm64: dts: Add ipq6018 SoC and CP01 board support

Hi Bjorn,
  Thanks again for the review.

On 12/29/2019 8:59 AM, Bjorn Andersson wrote:
> On Thu 19 Dec 02:41 PST 2019, Sricharan R wrote:
> 
>> Add initial device tree support for the Qualcomm IPQ6018 SoC and
>> CP01 evaluation board.
>>
> 
> Hi Sricharan, thanks for the rework, this looks pretty good now, just
> some minor comments below.
> 
>> Signed-off-by: Abhishek Sahu <absahu@...eaurora.org>
>> Signed-off-by: Sivaprakash Murugesan <sivaprak@...eaurora.org>
>> Signed-off-by: Sricharan R <sricharan@...eaurora.org>
> 
> Should this have some Co-developed-by?
> 

hmm, should be added here as well. will add it.

>> ---
>>
>>  [V2] Sorted nodes based on address, name, label.
>>       Removed unused clock nodes.
>>       Addressed other review comments.
>>
>>  arch/arm64/boot/dts/qcom/Makefile            |   1 +
>>  arch/arm64/boot/dts/qcom/ipq6018-cp01-c1.dts |  41 +++++
>>  arch/arm64/boot/dts/qcom/ipq6018.dtsi        | 215 +++++++++++++++++++++++++++
>>  3 files changed, 257 insertions(+)
>>  create mode 100644 arch/arm64/boot/dts/qcom/ipq6018-cp01-c1.dts
>>  create mode 100644 arch/arm64/boot/dts/qcom/ipq6018.dtsi
>>
>> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
>> index 6498a1e..2b24998 100644
>> --- a/arch/arm64/boot/dts/qcom/Makefile
>> +++ b/arch/arm64/boot/dts/qcom/Makefile
>> @@ -1,6 +1,7 @@
>>  # SPDX-License-Identifier: GPL-2.0
>>  dtb-$(CONFIG_ARCH_QCOM)	+= apq8016-sbc.dtb
>>  dtb-$(CONFIG_ARCH_QCOM)	+= apq8096-db820c.dtb
>> +dtb-$(CONFIG_ARCH_QCOM)	+= ipq6018-cp01-c1.dtb
>>  dtb-$(CONFIG_ARCH_QCOM)	+= ipq8074-hk01.dtb
>>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-mtp.dtb
>>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-longcheer-l8150.dtb
>> diff --git a/arch/arm64/boot/dts/qcom/ipq6018-cp01-c1.dts b/arch/arm64/boot/dts/qcom/ipq6018-cp01-c1.dts
>> new file mode 100644
>> index 0000000..82a6024
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/qcom/ipq6018-cp01-c1.dts
>> @@ -0,0 +1,41 @@
>> +// SPDX-License-Identifier: GPL-2.0
> 
> Please dual license as GPL+BSD
> 

 ok.

>> +/*
>> + * IPQ6018 CP01 board device tree source
>> + *
>> + * Copyright (c) 2019, The Linux Foundation. All rights reserved.
>> + */
>> +
>> +/dts-v1/;
>> +
>> +#include "ipq6018.dtsi"
>> +
>> +/ {
>> +	model = "Qualcomm Technologies, Inc. IPQ6018/AP-CP01-C1";
>> +	compatible = "qcom,ipq6018-cp01", "qcom,ipq6018";
>> +
>> +	aliases {
>> +		serial0 = &blsp1_uart3;
>> +	};
>> +
>> +	chosen {
>> +		stdout-path = "serial0:115200n8";
>> +		bootargs-append = " swiotlb=1";
>> +	};
>> +};
>> +
>> +&blsp1_uart3 {
>> +	pinctrl-0 = <&uart_pins>;
>> +	pinctrl-names = "default";
>> +	status = "ok";
>> +};
>> +
>> +&tlmm {
>> +	uart_pins: uart_pins {
> 
> Reference the &uart_pins directly, and please use a more specific name.
> 

 ok.

>> +		mux {
> 
> I would suggest that you either flatten the "mux" subnode and define the
> properties directly in &uart_pins; or you split it the functional pieces
> of rx { } tx { }.

 ok.

> 
> And right now you're duplicating the properties between the dtsi and the
> dts, either drop one of them or define the function in the dtsi and add
> the drive-strenght and bias-pull-down here.
> 

 ok, understand, will fix.

>> +			pins = "gpio44", "gpio45";
>> +			function = "blsp2_uart";
>> +			drive-strength = <8>;
>> +			bias-pull-down;
>> +		};
>> +	};
>> +};
>> diff --git a/arch/arm64/boot/dts/qcom/ipq6018.dtsi b/arch/arm64/boot/dts/qcom/ipq6018.dtsi
>> new file mode 100644
>> index 0000000..269287c
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/qcom/ipq6018.dtsi
>> @@ -0,0 +1,215 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * IPQ6018 SoC device tree source
>> + *
>> + * Copyright (c) 2019, The Linux Foundation. All rights reserved.
>> + */
>> +
>> +#include <dt-bindings/interrupt-controller/arm-gic.h>
>> +#include <dt-bindings/clock/qcom,gcc-ipq6018.h>
>> +
>> +/ {
>> +	#address-cells = <2>;
>> +	#size-cells = <2>;
>> +	interrupt-parent = <&intc>;
>> +
>> +	reserved-memory {
>> +		#address-cells = <2>;
>> +		#size-cells = <2>;
>> +		ranges;
>> +
>> +		tz: tz@...00000 {
>> +			reg = <0x0 0x48500000 0x0 0x00200000>;
>> +			no-map;
>> +		};
>> +	};
>> +
>> +	soc: soc {
> 
> soc@0
> 
> Shouldn't this be sorted after 'p'?
> 

 yes, will fix this as well.


Regards,
  Sricharan

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