linux-kernel - Re: [PATCH v2 2/4] arm64: dts: exynos: Add initial support for Samsung Galaxy S20 Series boards (hubble)

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Message-ID: <px4lfzrmgppve7rhwihjg3fbejemxtufoxlxu6r4igvuynuim7@vu2w746zuxlk>
Date: Fri, 18 Oct 2024 08:32:32 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Umer Uddin <umer.uddin@...tallysanemainliners.org>
Cc: Alim Akhtar <alim.akhtar@...sung.com>, Rob Herring <robh@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, linux-arm-kernel@...ts.infradead.org, 
	linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	igor.belwon@...tallysanemainliners.org
Subject: Re: [PATCH v2 2/4] arm64: dts: exynos: Add initial support for
 Samsung Galaxy S20 Series boards (hubble)

On Thu, Oct 17, 2024 at 05:43:25PM +0100, Umer Uddin wrote:
> Add initial support for the Samsung Galaxy S20 Series (hubble) phones.
> They were launched in 2020, and are based on the Exynos 990 SoC.
> The devices have multiple RAM configurations,
> starting from 8GB going all the way up to 16GB for the S20 Ultra devices.
> 
> This device tree adds support for the following:
> 
> - SimpleFB
> - 8GB RAM (Any more will be mapped in device trees)
> - Buttons
> 
> Signed-off-by: Umer Uddin <umer.uddin@...tallysanemainliners.org>
> ---
>  .../dts/exynos/exynos990-hubble-common.dtsi   | 109 ++++++++++++++++++
>  1 file changed, 109 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/exynos/exynos990-hubble-common.dtsi
> 
> diff --git a/arch/arm64/boot/dts/exynos/exynos990-hubble-common.dtsi b/arch/arm64/boot/dts/exynos/exynos990-hubble-common.dtsi
> new file mode 100644
> index 000000000..2c634e4bb
> --- /dev/null
> +++ b/arch/arm64/boot/dts/exynos/exynos990-hubble-common.dtsi
> @@ -0,0 +1,109 @@
> +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
> +/*
> + * Samsung Galaxy S20 Series device tree source
> + *
> + * Copyright (c) 2024, Umer Uddin <umer.uddin@...tallysanemainliners.org>
> + */
> +
> +/dts-v1/;
> +#include "exynos990.dtsi"
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/input/input.h>
> +#include <dt-bindings/interrupt-controller/irq.h>
> +
> +/ {
> +	chosen {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		framebuffer0: framebuffer@...00000 {
> +			compatible = "simple-framebuffer";
> +			reg = <0 0xf1000000 0 (1440 * 3200 * 4)>;
> +			width = <1440>;
> +			height = <3200>;
> +			stride = <(1440 * 4)>;
> +			format = "a8r8g8b8";
> +		};
> +	};
> +
> +	memory@...00000 {
> +		device_type = "memory";
> +		reg = <0x0 0x80000000 0x0 0x3ab00000>,
> +		      /* Memory hole */
> +		      <0x0 0xc1200000 0x0 0x1ee00000>,
> +		      /* Memory hole */
> +		      <0x0 0xe1900000 0x0 0x1e700000>,
> +		      /* Memory hole */
> +		      <0x8 0x80000000 0x1 0x7ec00000>;


If I am counting correctly, that's only 8 GB, not 12.

Best regards,
Krzysztof