From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: David Brownell <david-b@pacbell.net>
Cc: Felipe Balbi <felipe.balbi@nokia.com>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Anton Vorontsov <avorontsov@ru.mvista.com>,
Grazvydas Ignotas <notasas@gmail.com>,
Madhusudhan Chikkature <madhu.cr@ti.com>,
linux-omap@vger.kernel.org, Greg Kroah-Hartman <gregkh@suse.de>
Subject: Re: [RFC/PATCH 1/5] usb: otg: add notifier support
Date: Tue, 26 Jan 2010 13:11:47 +0000 [thread overview]
Message-ID: <20100126131146.GC32291@sirena.org.uk> (raw)
In-Reply-To: <201001260316.20529.david-b@pacbell.net>
On Tue, Jan 26, 2010 at 03:16:20AM -0800, David Brownell wrote:
> I'd vote to convert all the USB-to-charger interfaces so
> they use notifiers. After fixing the events ... see
> comments below. :)
Yes please - it's not just chargers either, this can also be used by
PMICs which do power path management that includes USB.
> Those seem like the wrong events. The right events for a charger
> would be more along the lines of:
> - For peripheral: "you may use N milliAmperes now".
> - General: "Don't Charge" (a.k.a. "use 0 mA").
> I don't see how "N" would be passed with those events ...
These are good for the peripheral side. You do get to pass a void *
along with the notifier value, that could be used to pass data like the
current limit.
> A host *might* want to be able to say things like "supply
> up to N milliAmperes now", e.g. to let a regulator choose
> the most efficient mode.
Yes, they definitely want this - not just for efficiency but also to
allow current limiting to protect the system from excessive current
drain.
next prev parent reply other threads:[~2010-01-26 13:11 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-27 14:44 [PATCH] power_supply: Add driver for TWL4030/TPS65950 BCI charger Grazvydas Ignotas
2009-11-27 14:54 ` Anton Vorontsov
2009-11-27 15:47 ` Grazvydas Ignotas
2009-11-27 16:23 ` Mark Brown
2009-11-30 18:45 ` Madhusudhan
2009-11-30 18:58 ` Anton Vorontsov
2009-12-02 20:38 ` Grazvydas Ignotas
2009-12-02 21:27 ` Anton Vorontsov
2009-12-02 21:32 ` Grazvydas Ignotas
2009-11-30 21:33 ` Grazvydas Ignotas
2009-12-02 16:59 ` Madhusudhan
2009-12-02 17:33 ` Felipe Balbi
2009-12-02 20:34 ` Grazvydas Ignotas
2009-12-02 20:49 ` Felipe Balbi
2009-12-02 21:29 ` Grazvydas Ignotas
2009-12-02 21:54 ` Anton Vorontsov
2009-12-02 22:31 ` Felipe Balbi
2009-12-02 22:59 ` Anton Vorontsov
2009-12-03 8:39 ` Felipe Balbi
2009-12-03 10:55 ` Grazvydas Ignotas
2009-12-03 11:03 ` Felipe Balbi
2009-12-10 14:09 ` Grazvydas Ignotas
2009-12-10 14:18 ` Anton Vorontsov
2009-12-10 14:21 ` Felipe Balbi
2009-12-10 14:44 ` Anton Vorontsov
2009-12-10 16:51 ` Felipe Balbi
2009-12-10 20:51 ` Grazvydas Ignotas
2009-12-11 11:31 ` [RFC/PATCH 1/5] usb: otg: add notifier support Felipe Balbi
[not found] ` <1260531086-23857-2-git-send-email-felipe.balbi-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org>
2009-12-11 11:55 ` Mark Brown
2009-12-11 11:58 ` Felipe Balbi
2010-01-26 11:16 ` David Brownell
2010-01-26 13:11 ` Mark Brown [this message]
2010-01-26 13:35 ` David Brownell
2010-01-26 14:14 ` Felipe Balbi
2010-01-26 14:24 ` Oliver Neukum
[not found] ` <201001261524.49661.oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org>
2010-01-26 14:30 ` Felipe Balbi
2010-01-26 15:16 ` David Brownell
2010-01-26 15:21 ` David Brownell
2010-01-26 18:50 ` Felipe Balbi
[not found] ` <201001260535.21689.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2010-01-26 14:21 ` Mark Brown
2010-01-26 15:44 ` David Brownell
2010-01-26 16:13 ` Mark Brown
2010-01-26 14:10 ` Felipe Balbi
2010-01-26 14:19 ` Felipe Balbi
[not found] ` <20100126141935.GG10690-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org>
2010-01-26 15:33 ` David Brownell
2010-01-26 15:07 ` David Brownell
2010-01-26 19:09 ` Felipe Balbi
[not found] ` <20100126190934.GC20049-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org>
2010-01-26 19:15 ` Felipe Balbi
2009-12-11 11:31 ` [RFC/PATCH 2/5] usb: otg: twl4030: add support for notifier Felipe Balbi
[not found] ` <1260531086-23857-3-git-send-email-felipe.balbi-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org>
2009-12-11 17:22 ` sai pavan
[not found] ` <c60a9cb0912110922g10fd0cc7m3b3430731db5ed81-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-12-11 20:40 ` Felipe Balbi
2009-12-12 18:34 ` Mark Brown
2009-12-14 10:30 ` [RFC/PATCH 0/4] twl4030 threaded_irq support Felipe Balbi
[not found] ` <1260786654-13294-1-git-send-email-felipe.balbi-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org>
2010-01-26 7:06 ` David Brownell
2010-01-26 7:36 ` David Brownell
2010-01-26 10:07 ` Mark Brown
2010-01-26 11:02 ` Felipe Balbi
2010-01-26 12:18 ` David Brownell
[not found] ` <20091212183410.GF3092-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2009-12-14 10:30 ` [RFC/PATCH 1/4] input: keyboard: twl4030: move to request_threaded_irq Felipe Balbi
2009-12-14 10:30 ` [RFC/PATCH 2/4] input: misc: " Felipe Balbi
2009-12-14 11:31 ` Shilimkar, Santosh
2009-12-14 11:40 ` Felipe Balbi
2009-12-14 13:16 ` Shilimkar, Santosh
2009-12-14 10:30 ` [RFC/PATCH 4/4] usb: otg: " Felipe Balbi
2009-12-14 10:30 ` [RFC/PATCH 3/4] rtc: " Felipe Balbi
[not found] ` <6ed0b2680912101251jeec28e6i216dfc51caab13aa-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-12-11 11:31 ` [RFC/PATCH 0/5] usb transceiver notifier Felipe Balbi
2009-12-11 11:31 ` [RFC/PATCH 3/5] usb: musb: add support for ulpi block Felipe Balbi
2009-12-11 11:31 ` [RFC/PATCH 4/5] usb: musb: isp1704: add registers from isp1704 Felipe Balbi
[not found] ` <1260531086-23857-5-git-send-email-felipe.balbi-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org>
2009-12-11 12:35 ` Krogerus Heikki (EXT-Teleca/Helsinki)
2009-12-11 12:57 ` Felipe Balbi
2009-12-11 11:31 ` [RFC/PATCH 5/5] usb: musb: musb supports otg notifier Felipe Balbi
[not found] ` <1260531086-23857-6-git-send-email-felipe.balbi-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org>
2009-12-11 11:40 ` Felipe Balbi
2009-12-30 19:07 ` [PATCH] power_supply: Add driver for TWL4030/TPS65950 BCI charger Madhusudhan
2009-12-10 14:19 ` Felipe Balbi
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