linux-kernel - Re: [PATCH 2/2] usb: misc: onboard_usb

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Message-ID: <Zd4sCyPNNjzB5Gre@google.com>
Date: Tue, 27 Feb 2024 18:38:03 +0000
From: Matthias Kaehlcke <mka@...omium.org>
To: Macpaul Lin <macpaul.lin@...iatek.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	Bear Wang <bear.wang@...iatek.com>,
	Pablo Sun <pablo.sun@...iatek.com>, Macpaul Lin <macpaul@...il.com>,
	Chunfeng Yun <chunfeng.yun@...iatek.com>,
	Yow-shin Liou <yow-shin.liou@...iatek.com>,
	MediaTek Chromebook Upstream <Project_Global_Chrome_Upstream_Group@...iatek.com>,
	Chen-Yu Tsai <wenst@...omium.org>
Subject: Re: [PATCH 2/2] usb: misc: onboard_usb_hub: Add support for TI
 TUSB8020B

On Tue, Feb 27, 2024 at 05:02:28PM +0800, Macpaul Lin wrote:
> The TI TUSB8020B is a 2-port USB 3.0 hub. Add support for
> this hub in the driver in order to bring up reset, and supply
> dependencies.
> 
> Power-up: Issue a GPIO reset (GRSTz) 3ms after VDD and VDD33 stabilize.
> 
> Signed-off-by: Macpaul Lin <macpaul.lin@...iatek.com>

Generally this looks good to me, but it should probably wait for
"usb: misc: onboard_dev: use device supply names" [1] to land and
use a device specific supply name instead of 'vdd'.

[1] https://lore.kernel.org/linux-usb/20240220-onboard_xvf3500-v4-6-dc1617cc5dd4@wolfvision.net/