From: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
To: balbi-l0cyMroinI0@public.gmane.org,
Andy Green <andy.green-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Alan Stern
<stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org>
Cc: keshava_mgowda-l0cyMroinI0@public.gmane.org,
linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 16/16] ARM: OMAP: omap4panda: Power down the USB PHY and ETH when not in use
Date: Thu, 22 Nov 2012 17:00:45 +0200 [thread overview]
Message-ID: <50AE3E1D.9000607@ti.com> (raw)
In-Reply-To: <20121122135603.GA20066-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
On 11/22/2012 03:56 PM, Felipe Balbi wrote:
> Hi,
>
> On Thu, Nov 22, 2012 at 09:49:05PM +0800, Andy Green wrote:
>>> Again it sounds like something that should be done at the hub driver
>>> level. I mean using the GPIO (for reset) and Power Regulator.
>>>
>>> not implementing the regulator part itself, but using it.
>>
>> If you mean change the regulator managing code from living in
>> omap-hsusb to ehci-hcd, it sounds like a good idea.
>
> I mean that drivers/usb/core/hub.c should manage it, since that's what
> actually manages the HUB entity.
Yes. I agree that powering up the on-board hubs should be done
generically and not in ehci-omap.c. I'm not sure how it can be done in
hub.c.
I'm assuming that such problem is limited to root hub ports where system
designers have the flexibility to provide power to the peripherals
outside the USB Hub specification.
I can think of two solutions
1) Associate the regulators with the root hub _ports_ and enable them as
part of port's power-up routine.
2) Have a global list of regulators that are registered by platform code
and enabled them all at once on hcd init.
Any clues on how (1) could be implemented?
--
cheers,
-roger
--
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next prev parent reply other threads:[~2012-11-22 15:00 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-15 14:33 [PATCH 00/16] OMAP USB Host cleanup Roger Quadros
2012-11-15 14:33 ` [PATCH 01/16] mfd: omap-usb-tll: Avoid creating copy of platform data Roger Quadros
2012-11-21 11:42 ` Felipe Balbi
2012-11-15 14:34 ` [PATCH 02/16] mfd: omap-usb-tll: Clean up clock handling Roger Quadros
2012-11-21 11:55 ` Felipe Balbi
2012-11-21 12:36 ` Roger Quadros
2012-11-21 14:03 ` Felipe Balbi
[not found] ` <20121121140354.GR10216-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-21 15:39 ` Roger Quadros
[not found] ` <50ACF5CD.9010209-l0cyMroinI0@public.gmane.org>
2012-11-21 19:39 ` Felipe Balbi
2012-11-22 8:19 ` Roger Quadros
2012-11-15 14:34 ` [PATCH 03/16] mfd: omap-usb-tll: introduce and use mode_needs_tll() Roger Quadros
2012-11-21 11:57 ` Felipe Balbi
[not found] ` <20121121115705.GE10216-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-21 12:37 ` Roger Quadros
[not found] ` <1352990054-14680-1-git-send-email-rogerq-l0cyMroinI0@public.gmane.org>
2012-11-15 14:34 ` [PATCH 04/16] mfd: omap-usb-tll: Move port clock handling out of runtime ops Roger Quadros
[not found] ` <1352990054-14680-5-git-send-email-rogerq-l0cyMroinI0@public.gmane.org>
2012-11-21 12:06 ` Felipe Balbi
2012-11-21 12:45 ` Roger Quadros
[not found] ` <50ACCCFA.6060605-l0cyMroinI0@public.gmane.org>
2012-11-21 14:07 ` Felipe Balbi
2012-11-15 14:34 ` [PATCH 05/16] mfd: omap-usb-tll: Add OMAP5 revision and HSIC support Roger Quadros
[not found] ` <1352990054-14680-6-git-send-email-rogerq-l0cyMroinI0@public.gmane.org>
2012-11-21 12:12 ` Felipe Balbi
[not found] ` <20121121121238.GG10216-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-21 12:49 ` Roger Quadros
2012-11-21 14:08 ` Felipe Balbi
2012-11-15 14:34 ` [PATCH 06/16] mfd: omap-usb-host: cleanup clock management code Roger Quadros
[not found] ` <1352990054-14680-7-git-send-email-rogerq-l0cyMroinI0@public.gmane.org>
2012-11-21 13:39 ` Felipe Balbi
2012-11-26 15:14 ` Roger Quadros
[not found] ` <50B38765.5070901-l0cyMroinI0@public.gmane.org>
2012-11-26 20:02 ` Felipe Balbi
2012-11-27 9:41 ` Roger Quadros
2012-11-15 14:34 ` [PATCH 11/16] mfd: omap-usb-host: Manage HSIC clocks for HSIC mode Roger Quadros
[not found] ` <1352990054-14680-12-git-send-email-rogerq-l0cyMroinI0@public.gmane.org>
2012-11-21 13:54 ` Felipe Balbi
[not found] ` <20121121135451.GM10216-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-21 15:49 ` Roger Quadros
2012-11-15 14:34 ` [PATCH 15/16] ARM: OMAP4: omap4panda: Don't enable USB PHY clock from board Roger Quadros
2012-11-21 13:59 ` Felipe Balbi
2012-11-16 20:08 ` [PATCH 00/16] OMAP USB Host cleanup Kevin Hilman
[not found] ` <87fw49cnvh.fsf-1D3HCaltpLuhEniVeURVKkEOCMrvLtNR@public.gmane.org>
2012-11-19 10:11 ` Roger Quadros
[not found] ` <50AA05C3.7010003-l0cyMroinI0@public.gmane.org>
2012-11-19 23:22 ` Kevin Hilman
2012-11-20 23:13 ` Tony Lindgren
2012-11-21 10:05 ` Roger Quadros
2012-11-21 11:41 ` Felipe Balbi
2012-11-27 14:42 ` Roger Quadros
2012-11-27 16:30 ` Felipe Balbi
[not found] ` <20121127163022.GB24240-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-12-04 14:46 ` Grazvydas Ignotas
2012-11-15 14:34 ` [PATCH 07/16] mfd: omap_usb_host: Avoid creating copy of platform_data Roger Quadros
2012-11-21 13:40 ` Felipe Balbi
2012-11-15 14:34 ` [PATCH 08/16] mfd: omap-usb-host: know about number of ports from revision register Roger Quadros
2012-11-21 13:43 ` Felipe Balbi
[not found] ` <20121121134300.GJ10216-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-21 14:45 ` Roger Quadros
2012-11-21 19:44 ` Felipe Balbi
2012-11-15 14:34 ` [PATCH 09/16] mfd: omap-usb-host: override number of ports from platform data Roger Quadros
[not found] ` <1352990054-14680-10-git-send-email-rogerq-l0cyMroinI0@public.gmane.org>
2012-11-21 13:45 ` Felipe Balbi
2012-11-21 14:50 ` Roger Quadros
2012-11-21 19:47 ` Felipe Balbi
2012-11-15 14:34 ` [PATCH 10/16] mfd: omap-usb-host: Intialize all available ports Roger Quadros
2012-11-21 13:52 ` Felipe Balbi
2012-11-21 15:47 ` Roger Quadros
2012-11-21 19:48 ` Felipe Balbi
2012-11-27 12:10 ` Roger Quadros
2012-11-27 13:28 ` Felipe Balbi
[not found] ` <20121127132827.GC22556-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-27 13:39 ` Roger Quadros
2012-11-15 14:34 ` [PATCH 12/16] ARM: OMAP2+: clock data: Merge utmi_px_gfclk into usb_host_hs_utmi_px_clk Roger Quadros
2012-11-15 14:34 ` [PATCH 13/16] mfd: omap-usb-host: Get rid of unnecessary spinlock Roger Quadros
[not found] ` <1352990054-14680-14-git-send-email-rogerq-l0cyMroinI0@public.gmane.org>
2012-11-21 13:57 ` Felipe Balbi
[not found] ` <20121121135732.GN10216-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-21 15:55 ` Roger Quadros
2012-11-21 19:50 ` Felipe Balbi
2012-11-15 14:34 ` [PATCH 14/16] mfd: omap-usb-host: Support an auxiliary clock per port Roger Quadros
[not found] ` <1352990054-14680-15-git-send-email-rogerq-l0cyMroinI0@public.gmane.org>
2012-11-21 13:58 ` Felipe Balbi
[not found] ` <20121121135841.GO10216-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-21 16:00 ` Roger Quadros
2012-11-15 14:34 ` [PATCH 16/16] ARM: OMAP: omap4panda: Power down the USB PHY and ETH when not in use Roger Quadros
2012-11-21 14:00 ` Felipe Balbi
[not found] ` <20121121140044.GQ10216-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-21 14:52 ` Alan Stern
2012-11-21 15:13 ` Roger Quadros
[not found] ` <50ACEFA5.4080104-l0cyMroinI0@public.gmane.org>
2012-11-21 15:32 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1211211028200.1731-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2012-11-21 16:07 ` Roger Quadros
2012-11-21 19:54 ` Felipe Balbi
[not found] ` <20121121195436.GF14290-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-22 1:13 ` Andy Green
2012-11-22 12:21 ` Felipe Balbi
[not found] ` <20121122121845.GB18022-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-22 13:49 ` Andy Green
2012-11-22 13:56 ` Felipe Balbi
[not found] ` <20121122135603.GA20066-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-22 15:00 ` Roger Quadros [this message]
[not found] ` <50AE3E1D.9000607-l0cyMroinI0@public.gmane.org>
2012-11-22 16:12 ` Felipe Balbi
[not found] ` <20121122161228.GB20665-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-23 10:23 ` Roger Quadros
[not found] ` <50AF4EB8.9010800-l0cyMroinI0@public.gmane.org>
2012-11-23 10:44 ` Felipe Balbi
[not found] ` <20121123104416.GD29585-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-23 16:25 ` Alan Stern
2012-11-23 20:37 ` Andy Green
2012-11-24 15:38 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1211241032490.4291-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org>
2012-11-24 22:00 ` Andy Green
[not found] ` <50B14395.4010404-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2012-11-25 0:41 ` Alan Stern
2012-11-22 17:36 ` Alan Stern
2012-11-22 17:53 ` Felipe Balbi
[not found] ` <20121122175340.GA22614-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-22 18:32 ` Alan Stern
2012-11-22 20:15 ` Felipe Balbi
2012-11-23 2:35 ` Alan Stern
2012-11-23 10:38 ` Felipe Balbi
[not found] ` <20121123103817.GC29585-S8G//mZuvNWo5Im9Ml3/Zg@public.gmane.org>
2012-11-23 16:27 ` Alan Stern
2012-11-26 8:52 ` Felipe Balbi
[not found] ` <Pine.LNX.4.44L0.1211221226360.2255-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org>
2012-11-23 0:19 ` Andy Green
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