From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: Nokia N900: musb is in wrong state after boot Date: Thu, 21 Jan 2016 12:30:13 -0800 Message-ID: <20160121203012.GN19432@atomide.com> References: <201601091616.04193@pali> <3690314.8jDXSUDcRZ@saturn> <20160121192113.GM19432@atomide.com> <8629381.KDSn8v3DtH@saturn> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <8629381.KDSn8v3DtH@saturn> Sender: linux-kernel-owner@vger.kernel.org To: joerg Reisenweber Cc: Pali =?utf-8?B?Um9ow6Fy?= , Felipe Balbi , Greg Kroah-Hartman , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, Ivaylo Dimitrov , Sebastian Reichel , Aaro Koskinen , Pavel Machek , Nishanth Menon List-Id: linux-omap@vger.kernel.org * joerg Reisenweber [160121 11:35]: > On Thu 21 January 2016 11:21:13 Tony Lindgren wrote: > > Do you have some pointer > > to the "certain resistor value on ID to GND" spec? Is it maybe part= of > > the carkit related parts of the USB spec? >=20 > ""Three additional ID pin states are defined[4] at the nominal resist= ance=20 > values of 124 k=CE=A9, 68 k=CE=A9, and 36.5 k=CE=A9, with respect to = the ground pin. These=20 > permit the device to work with USB Accessory Charger Adapters that al= lows the=20 > OTG device to be attached to both a charger and another device simult= aneously. > [6]"" > https://en.wikipedia.org/wiki/USB_On-The-Go#OTG_micro_plugs OK thanks. So it's the "accessory charger" part of the battery charging specification 1.1. Regards, Tony