Re: [PATCH] arm64: dts: rockchip: pwm-fan overlay for NanoPC-T6
From: Alexey Charkov <alchark@gmail.com>
Date: 2025-10-27 09:14:37
Also in:
linux-devicetree, linux-rockchip, lkml
Hi Hugh, On Mon, Oct 27, 2025 at 1:09 PM Hugh Cole-Baker [off-list ref] wrote:
FriendlyELEC offers an optional heatsink and fan addon for the NanoPC-T6 and T6 LTS. Add an overlay which can be applied if the fan is fitted and configures the fan as an active cooling device for the SoC package. Signed-off-by: Hugh Cole-Baker <redacted> --- FriendlyELEC heatsink with fan addon: https://www.friendlyelec.com/index.php?route=product/product&product_id=305 Vendor DT with trip points and PWM duty cycle values: https://github.com/friendlyarm/kernel-rockchip/blob/4944602540b62f5aad139fe602a76cf7c3176128/arch/arm64/boot/dts/rockchip/rk3588-nanopi6-rev01.dts#L75-L90
Is there any downside to enabling this unconditionally in the board .dts? Overlays require more user configuration, and not all bootloaders support them directly (e.g. systemd-boot users would struggle). Compiling with overlays enabled also makes .dtb's a lot larger due to added symbols information. Best regards, Alexey