From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762004AbcINSDQ (ORCPT ); Wed, 14 Sep 2016 14:03:16 -0400 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:60744 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755719AbcINSDM (ORCPT ); Wed, 14 Sep 2016 14:03:12 -0400 Date: Wed, 14 Sep 2016 19:02:14 +0100 From: Mark Brown To: NeilBrown Cc: Baolin Wang , Felipe Balbi , Greg KH , Sebastian Reichel , Dmitry Eremin-Solenikov , David Woodhouse , robh@kernel.org, Jun Li , Marek Szyprowski , Ruslan Bilovol , Peter Chen , Alan Stern , r.baldyga@samsung.com, grygorii.strashko@ti.com, Yoshihiro Shimoda , Lee Jones , Charles Keepax , patches@opensource.wolfsonmicro.com, Linux PM list , USB , device-mainlining@lists.linuxfoundation.org, LKML , "Bird, Timothy" Message-ID: <20160914180214.GI27974@sirena.org.uk> References: <20160909110727.GI27946@sirena.org.uk> <87pooc7n3t.fsf@notabene.neil.brown.name> <20160912122549.GZ27946@sirena.org.uk> <87inu11c5l.fsf@notabene.neil.brown.name> <20160912152627.GA27946@sirena.org.uk> <877fag1b6r.fsf@notabene.neil.brown.name> <20160914111603.GU27946@sirena.org.uk> <87r38mzi35.fsf@notabene.neil.brown.name> <20160914145703.GX27946@sirena.org.uk> <87oa3qz7zr.fsf@notabene.neil.brown.name> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="zhtSGe8h3+lMyY1M" Content-Disposition: inline In-Reply-To: <87oa3qz7zr.fsf@notabene.neil.brown.name> X-Cookie: Even bytes get lonely for a little bit. User-Agent: Mutt/1.6.0 (2016-04-01) X-SA-Exim-Connect-IP: 2a01:348:6:8808:fab::3 X-SA-Exim-Mail-From: broonie@sirena.org.uk Subject: Re: [PATCH v16 0/4] Introduce usb charger framework to deal with the usb gadget power negotation X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: No (on mezzanine.sirena.org.uk); Unknown failure Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --zhtSGe8h3+lMyY1M Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Sep 14, 2016 at 07:50:00PM +0200, NeilBrown wrote: > On Wed, Sep 14 2016, Mark Brown wrote: > Ah.... my mistake, sorry. > When earlier you said: > > It's a > > current limiter intended to sit in line with the USB power lines to > I assumed that all it did was limit the current to number given. > If it also limits the current to ensure that voltage doesn't drop > unduly, then I agree with your assertion that it just needs to be told > the upper limit. Oh, I see the gap here - the USB specific bit is only a current limiter but it works in concert with other bits of the system that try to stop the voltage from whatever supply is in use from dropping and can't be used independently of them. That's why I wasn't clear in what I said! > I hope you'll agree that other drivers might need to know the lower > limit, so reporting both to all drivers is sensible. Yes, absolutely. --zhtSGe8h3+lMyY1M Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBCAAGBQJX2ZClAAoJECTWi3JdVIfQHQMH/jHS3gYB20vDJ17lsCRZiIJl MFJgt5uH2gxYrR4HCnh7Ttc1Mie4vSso5J/e9pAratoBfchVn70ZRMXCRe3oxLwv v0sLmwC9J4un/fwee1o5aE/V3qVt/XKq2/EXwJ0FzaMOIG7cfk+u2RAYP88+edcM 6u4SIZUdSyggWGg03ilqrKm1Bs6E1mNwQRd1Hy3X987yOjJmMCQNzsgcVssm0nXN klNUnAz4NYrO4yg8QT66iB1oyu69tcbYgWY90O8JnSLnxp7VYDL+rYq8A82ZvwEa ATMi8xCfrhNnScdW+O4OKRCE7WGme7q9TG6hLuLTrpsSgjkEvHPBcMv6GdG4M4Y= =HgrO -----END PGP SIGNATURE----- --zhtSGe8h3+lMyY1M--