linux-kernel - Re: [PATCH v3 0/4] arm64: dts: exynos: add initial support for Samsung Galaxy S22+

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Message-ID: <dda1bb8c-66e7-4398-ae78-c2b21749e5c4@kernel.org>
Date: Wed, 16 Apr 2025 09:20:23 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Ivaylo Ivanov <ivo.ivanov.ivanov1@...il.com>,
 Alim Akhtar <alim.akhtar@...sung.com>, Rob Herring <robh@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/4] arm64: dts: exynos: add initial support for
 Samsung Galaxy S22+

On 21/03/2025 15:55, Ivaylo Ivanov wrote:
> Hey folks,
> 
> This patchset adds device tree files for Exynos 2200 and Samsung
> Galaxy S22+.
> 
> Exynos 2200 SoC is an ARMv8 mobile SoC found in the Samsung Galaxy S22
> (r0s), S22+ (g0s), S22 Ultra (b0s) Add minimal support for that SoC,
> including psci, pmu, chipid, architecture timer and mct, pinctrl,
> clocks and usb.
> 
> The devices using this SoC suffer from an issue caused by the stock
> Samsung bootloader, as it doesn't configure CNTFRQ_EL0. Hence it's
> needed to hardcode the adequate frequency in the timer node,
> otherwise the kernel panics.
> 
> Another issue is that cpu2 and cpu3 fail to come up consistently, which
> leads to a hang later in the boot process. As A510 cores are clustered
> by two, it makes sense for both of these cpus to fail if there is a
> power issue. Disable them until the problem is figured out.
> 
> Samsung Galaxy S22+ (SM-S906B), codenamed g0s, is a mobile phone from
> 2022. It features 8GB RAM, 128/256GB UFS 3.1, Exynos 2200 SoC and a
> 1080x2340 Dynamic AMOLED display.
> 
> Further platform support will be added over time.
> 
> I expect [1], [2] and [3] to be merged in next before this patchset
> because it depends on the aforementioned series for drivers and device
> tree bindings.

Please document dependencies at the top - this is the most important
part of cover letter.

Ping me when dependencies get merged.

Best regards,
Krzysztof