Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752215AbcCYHJx (ORCPT ); Fri, 25 Mar 2016 03:09:53 -0400 Received: from mail-pa0-f68.google.com ([209.85.220.68]:33186 "EHLO mail-pa0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751962AbcCYHJu (ORCPT ); Fri, 25 Mar 2016 03:09:50 -0400 Date: Fri, 25 Mar 2016 15:09:37 +0800 From: Peter Chen To: Baolin Wang Cc: balbi@kernel.org, gregkh@linuxfoundation.org, sre@kernel.org, dbaryshkov@gmail.com, dwmw2@infradead.org, peter.chen@freescale.com, stern@rowland.harvard.edu, r.baldyga@samsung.com, yoshihiro.shimoda.uh@renesas.com, lee.jones@linaro.org, broonie@kernel.org, ckeepax@opensource.wolfsonmicro.com, patches@opensource.wolfsonmicro.com, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, device-mainlining@lists.linuxfoundation.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the usb gadget power negotation Message-ID: <20160325070937.GA22398@peterchendt> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 863 Lines: 19 On Thu, Mar 24, 2016 at 08:35:53PM +0800, Baolin Wang wrote: > Currently the Linux kernel does not provide any standard integration of this > feature that integrates the USB subsystem with the system power regulation > provided by PMICs meaning that either vendors must add this in their kernels > or USB gadget devices based on Linux (such as mobile phones) may not behave > as they should. Thus provide a standard framework for doing this in kernel. > > Now introduce one user with wm831x_power to support and test the usb charger, > which is pending testing. Moreover there may be other potential users will use > it in future. > I am afraid I still not find the user (udc driver) for this framework, I would like to see how udc driver block the enumeration until the charger detection has finished, or am I missing something? -- Best Regards, Peter Chen