linux-kernel - Re: Nokia N900: musb is in wrong state after boot

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Date:	Thu, 21 Jan 2016 20:34:14 +0100
From:	joerg Reisenweber <joerg@...nmoko.org>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Pali Rohár <pali.rohar@...il.com>,
	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Sebastian Reichel <sre@...nel.org>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Pavel Machek <pavel@....cz>, Nishanth Menon <nm@...com>
Subject: Re: Nokia N900: musb is in wrong state after boot

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

/j

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