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Date: Thu, 01 May 2025 11:01:53 +0000
From: Kaustabh Chakraborty <kauschluss@disroot.org>
To: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Rob Herring <robh@kernel.org>, Krzysztof Kozlowski <krzk+dt@kernel.org>,
 Conor Dooley <conor+dt@kernel.org>, Alim Akhtar <alim.akhtar@samsung.com>,
 Kees Cook <kees@kernel.org>, Tony Luck <tony.luck@intel.com>, "Guilherme G.
 Piccoli" <gpiccoli@igalia.com>, Ivaylo Ivanov
 <ivo.ivanov.ivanov1@gmail.com>, devicetree@vger.kernel.org,
 linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org,
 linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org
Subject: Re: [PATCH v6 3/5] arm64: dts: exynos: add initial support for
 Samsung Galaxy J7 Prime
In-Reply-To: <298d8c1f-40ca-4377-a7a5-69f81989d7ea@kernel.org>
References: <20250414-exynos7870-v6-0-039bd5385411@disroot.org>
 <20250414-exynos7870-v6-3-039bd5385411@disroot.org>
 <298d8c1f-40ca-4377-a7a5-69f81989d7ea@kernel.org>
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On 2025-05-01 10:13, Krzysztof Kozlowski wrote:
> On 13/04/2025 20:58, Kaustabh Chakraborty wrote:
>> +		key-volup {
>> +			label = "Volume Up Key";
>> +			gpios = <&gpa2 0 GPIO_ACTIVE_LOW>;
>> +			linux,code = <KEY_VOLUMEUP>;
>> +		};
>> +	};
>> +
>> +	memory@40000000 {
>> +		device_type = "memory";
>> +		reg = <0x0 0x40000000 0x3e400000>;
>> +	};
>> +
>> +	memory@80000000 {
> 
> Why are these two separate device nodes, instead of one for two ranges?
> Does device has somehow two independent memory controllers?

This is from Galaxy J6:

	memory@40000000 {
		device_type = "memory";
		reg = <0x0 0x40000000 0x3d800000>;
	};

	memory@80000000 {
		device_type = "memory";
		reg = <0x0 0x80000000 0x40000000>;
	};

changes to

	memory@40000000 {
		device_type = "memory";
		reg = <0x0 0x40000000 0x3d800000>,
		      <0x0 0x80000000 0x7d800000>;
	};

I assume I have changed it correctly? `free -h` displays the full
and correct memory capacity.

> 
> 
> Best regards,
> Krzysztof