Re: [PATCH v2 2/2] arm64: dts: exynos: Add initial support for Samsung Galaxy A21s (SM-A217F)

[Krzysztof Kozlowski]

On Sun, Sep 13, 2026 at 01:37:40PM +0100, Thomas Turner wrote:
> Add initial support for the Samsung Galaxy A21s (a21s) phone. It was
> launched in 2020, and it's based on the Exynos 850 SoC. It has multiple
> RAM configurations: 3GB, 4GB and 6GB.
> 
> Since our bootloader does not set up memory nodes beforehand, default to
> the 3GB variant. Custom bootloaders can be used to initialise other
> nodes per RAM configuration.
> 
> The Exynos DPU clocks required by simple-framebuffer are not kept
> enabled during boot. Add the DECON, DMA, DPP, PPMU and SSMU DPU clocks
> to the simple-framebuffer node so simpledrm maintains references to
> them. Without these clocks, the framebuffer fails to remain operational
> further into boot.
> 
> This device tree adds support for the following:
> 
> - SimpleFB
> - 3GB RAM
> - Buttons
> - Ramoops
> - MMC
> - USB
> - Watchdog
> 
> Signed-off-by: Thomas Turner <tturner@xxxxxxxxxxxxx>
> ---
> Changes in v2:
>  - Re-order properties/nodes to pass dt-check-style --mode strict

This is based on some old fork... You need to develop on current
maintainer's tree and test the same. linux-next usually works fine.

Best regards,
Krzysztof