linux-kernel - Re: [PATCH v3 2/3] ARM: dts: exynos: Add Google Manta (Nexus 10)

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Message-ID: <eb898d21-5fda-474d-979e-18da33a85415@ixit.cz>
Date: Mon, 15 Dec 2025 21:06:31 +0100
From: David Heidelberg <david@...t.cz>
To: Krzysztof Kozlowski <krzk@...nel.org>,
 Lukas Timmermann <linux@...mermann.space>,
 Alim Akhtar <alim.akhtar@...sung.com>, Rob Herring <robh@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Russell King <linux@...linux.org.uk>
Cc: linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 phone-devel@...r.kernel.org, Alexandre Marquet <tb@...arquet.fr>
Subject: Re: [PATCH v3 2/3] ARM: dts: exynos: Add Google Manta (Nexus 10)



On 15/12/2025 20:33, Krzysztof Kozlowski wrote:
> On 15/12/2025 19:53, David Heidelberg wrote:
>> Hello Lucas,
>>
>> thanks for the sending Nexus 10 upstream, see few nitpicks below:
>>
>> On 15/12/2025 16:05, Lukas Timmermann wrote:
>>> From: Alexandre Marquet <tb@...arquet.fr>
>>>
>>> Manta is the code name for Google Nexus 10, and was manufactured by
>>> Samsung with their Exynos5250 SoC.
>>> This patch adds initial device-tree file for this board.
>>>
>>> Signed-off-by: Alexandre Marquet <tb@...arquet.fr>
>>> Co-developed-by: Lukas Timmermann <linux@...mermann.space>
>>> Signed-off-by: Lukas Timmermann <linux@...mermann.space>
>>> ---
>>>    arch/arm/boot/dts/samsung/Makefile             |   1 +
>>>    arch/arm/boot/dts/samsung/exynos5250-manta.dts | 511 +++++++++++++++++++++++++
>>>    2 files changed, 512 insertions(+)
>>>
>>> diff --git a/arch/arm/boot/dts/samsung/Makefile b/arch/arm/boot/dts/samsung/Makefile
>>> index 7becf36656b1..e0143ee8c82d 100644
>>> --- a/arch/arm/boot/dts/samsung/Makefile
>>> +++ b/arch/arm/boot/dts/samsung/Makefile
>>> @@ -26,6 +26,7 @@ dtb-$(CONFIG_ARCH_EXYNOS4) += \
>>>    	exynos4412-trats2.dtb
>>>    dtb-$(CONFIG_ARCH_EXYNOS5) += \
>>>    	exynos5250-arndale.dtb \
>>> +	exynos5250-manta.dtb \
>>>    	exynos5250-smdk5250.dtb \
>>>    	exynos5250-snow.dtb \
>>>    	exynos5250-snow-rev5.dtb \
>>> diff --git a/arch/arm/boot/dts/samsung/exynos5250-manta.dts b/arch/arm/boot/dts/samsung/exynos5250-manta.dts
>>> new file mode 100644
>>> index 000000000000..0f006590576c
>>> --- /dev/null
>>> +++ b/arch/arm/boot/dts/samsung/exynos5250-manta.dts
>>> @@ -0,0 +1,511 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>
>> you could use here modern SPDX I guess (GPL-2.0-only)
>>
>>> +/*
>>> + * Google Manta (Nexus 10) board device tree source
>>> + *
>>> + * Copyright (c) 2023-2025 Alexandre Marquet
>>> + * Copyright (c) 2025 Lukas Timmermann
>>> + */
>>> +
>>> +/dts-v1/;
>>> +#include <dt-bindings/leds/common.h>
>>> +#include <dt-bindings/gpio/gpio.h>
>>> +#include <dt-bindings/clock/maxim,max77686.h>
>>> +#include <dt-bindings/input/linux-event-codes.h>
>>> +#include "exynos-pinctrl.h"
>>> +#include "exynos5250.dtsi"
>>> +#include "exynos-mfc-reserved-memory.dtsi"
>>> +
>>> +/ {
>>> +	model = "Google Nexus 10";
>>> +	compatible = "google,manta", "samsung,exynos5250", "samsung,exynos5";
>>> +
>>> +	aliases {
>>> +		mmc0 = &mmc_0; /* eMMC */
>>> +		mmc1 = &mmc_1; /* WiFi */
>>> +	};
>>> +
>>> +	bmp180_vdda_reg: regulator-bmp180-vdda {
>>> +		compatible = "regulator-fixed";
>>> +		regulator-name = "BMP180_VDDA";
>>> +	};
>> something-something-regulator (all occurences within the DTS)
>>
> 
> I don't understand this suggestion.

oh right, let me clarify,

the regulator name should end with -regulator postfix.

> 
>>> +
>>> +	bmp180_vddd_reg: regulator-bmp180-vddd {
>>> +		compatible = "regulator-fixed";
>>> +		regulator-name = "BMP180_VDDD";
>>> +	};
> 
> 
> 
>>> +};
>>> +
>>> +&clock {
>>> +	assigned-clocks = <&clock CLK_FOUT_APLL>;
>>> +	assigned-clock-rates = <1000000000>;
>>> +};
>>> +
>>> +&cpu0 {
>>> +	cpu0-supply = <&buck2_reg>;
>>> +};
>>> +
>>> +&ehci {
>>> +	status = "disabled";
>>> +};
>>> +
>>> +&i2c_0 {
>>> +	status = "okay";
>>
>> status should be before first sub-node (none in this case), with
>> preceding newline, please change all occurences
>>
> 
> Well yeah, but do you have actually any comment pointing real issues?

No I don't, just generic device-tree nitpicks.

David

> 
> 
> Best regards,
> Krzysztof

-- 
David Heidelberg