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Date: Thu, 21 Jan 2016 12:30:13 -0800
From: Tony Lindgren <tony@atomide.com>
To: joerg Reisenweber <joerg@openmoko.org>
Cc: Pali =?utf-8?B?Um9ow6Fy?= <pali.rohar@gmail.com>,
        Felipe Balbi <balbi@ti.com>,
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        Aaro Koskinen <aaro.koskinen@iki.fi>, Pavel Machek <pavel@ucw.cz>,
        Nishanth Menon <nm@ti.com>
Subject: Re: Nokia N900: musb is in wrong state after boot
Message-ID: <20160121203012.GN19432@atomide.com>
References: <201601091616.04193@pali>
 <3690314.8jDXSUDcRZ@saturn>
 <20160121192113.GM19432@atomide.com>
 <8629381.KDSn8v3DtH@saturn>
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* joerg Reisenweber <joerg@openmoko.org> [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?
> 
> ""Three additional ID pin states are defined[4] at the nominal resistance 
> values of 124 kΩ, 68 kΩ, and 36.5 kΩ, with respect to the ground pin. These 
> permit the device to work with USB Accessory Charger Adapters that allows the 
> OTG device to be attached to both a charger and another device simultaneously.
> [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