From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Chen Subject: Re: [PATCH v2 0/3] USB: add generic onboard USB HUB driver Date: Tue, 15 Dec 2015 16:33:26 +0800 Message-ID: <20151215083259.GA13809@shlinux2> References: <1450077974-22762-1-git-send-email-peter.chen@freescale.com> <3023844.AYbAYqvHUZ@wuerfel> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Return-path: Content-Disposition: inline In-Reply-To: <3023844.AYbAYqvHUZ@wuerfel> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Arnd Bergmann Cc: shawnguo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, pawel.moll-5wv7dgnIgG8@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, festevam-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, p.zabel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org, patryk-6+2coLtxvIyvnle+31E0rA@public.gmane.org, linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, balbi-l0cyMroinI0@public.gmane.org, mathieu.poirier-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org List-Id: devicetree@vger.kernel.org On Mon, Dec 14, 2015 at 10:35:19AM +0100, Arnd Bergmann wrote: > On Monday 14 December 2015 15:26:11 Peter Chen wrote: > > Hi all, > > > > There is a known issue that the USB code can't handle USB HUB's > > external pins well, in that case, it may cause some onboard > > USB HUBs can't work since their PHY's clock or reset pin needs to > > operate. > > > > The user reported this issue at below: > > http://www.spinics.net/lists/linux-usb/msg131502.html > > > > In this patch set, I add a generic onboard USB HUB driver to > > handle this problem, the external signals will be configured > > before usb controller's initialization, it much likes we did > > it at board code before. > > > > The user needs to add this generic hub node at dts to support it. > > > > @The udoo users, help to test please. > > I still think need to do this properly by representing the hub > device as a USB device, using power sequencing code like MMC does. > > Arnd I will try to have a patch set for general onboard USB device. -- Best Regards, Peter Chen -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html