linux-kernel - Re: [PATCH v8 0/2] Add SpacemiT K1 USB3.0 host controller support

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Message-ID: <AB4F40590DDC4024+aOzIfRgZZpZc3HeH@kernel.org>
Date: Mon, 13 Oct 2025 17:38:05 +0800
From: Troy Mitchell <troy.mitchell@...ux.spacemit.com>
To: Ze Huang <huang.ze@...ux.dev>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Yixun Lan <dlan@...too.org>,
	Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
	Philipp Zabel <p.zabel@...gutronix.de>
Cc: linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
	linux-riscv@...ts.infradead.org, spacemit@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Troy Mitchell <troy.mitchell@...ux.spacemit.com>
Subject: Re: [PATCH v8 0/2] Add SpacemiT K1 USB3.0 host controller support

On Sat, Sep 13, 2025 at 12:53:46AM +0800, Ze Huang wrote:
> The USB 3.0 controller found in the SpacemiT K1 SoC[1] supports both USB3.0
> Host and USB2.0 Dual-Role Device (DRD). 
> 
> This controller is compatible with DesignWare Core USB 3 (DWC3) driver.
> However, constraints in the `snps,dwc3` bindings limit the ability to describe
> hardware-specific features in a clean and maintainable way. While
> `dwc3-of-simple` still serves as a glue layer for many platforms, it requires a
> split device tree node structure, which is less desirable in newer platforms.
> 
> To promote a transition toward a flattened `dwc` node structure, this series
> introduces `dwc3-generic-plat`, building upon prior efforts that exposed the
> DWC3 core driver [2].
> 
> The device tree support for SpacemiT K1 will be submitted separately when the
> associated PHY driver is ready.
> 
> This series is based on 6.17-rc1 and has been tested on BananaPi development
> boards.
> 
> Link: https://developer.spacemit.com/documentation?token=AjHDwrW78igAAEkiHracBI9HnTb [1]
> Link: https://lore.kernel.org/all/20250414-dwc3-refactor-v7-3-f015b358722d@oss.qualcomm.com [2]
> 
> Signed-off-by: Ze Huang <huang.ze@...ux.dev>
> ---
Tested-by: Troy Mitchell <troy.mitchell@...ux.spacemit.com>

Thanks,
Troy