Messages in this thread | | | Date | Thu, 1 Dec 2011 13:46:12 +0900 | Subject | Re: [RFC PATCH 0/3] introduce: Multistate Switch Class | From | MyungJoo Ham <> |
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On Thu, Dec 1, 2011 at 7:56 AM, NeilBrown <neilb@suse.de> wrote: > On Wed, 30 Nov 2011 15:40:48 +0900 MyungJoo Ham <myungjoo.ham@gmail.com> > wrote: > >> I'm focusing on an external connector or port that each physical port >> may inhabit multiple cables at a time although it should support a >> port that may inhabit a single cable only at a time. However, the >> class could be used for other general "multistate mux" that connects >> different device drivers. > > Hi, > maybe I'm just slow, but I'm having a lot of trouble imagining a single port > that could have multiple cables plugged in at the same time. And this > blockage is stopping me from reflecting usefully on your other points. > > Are you able to show me a picture or a diagram or something so I can > visualise what you are talking about? > To me: once you plug one cable into a port, it is full and there is no room > for any more cables.
Hello,
I can't take/send picture at work, so, I'll write some examples.
1. Dock with multiple ports as Mark suggested. 2. a 30-pin cable with multiple cable sockets (basically, this is a light-weight dock, too). A cable that connects to multiple other devics from a computer (including any ARM midgets and full PCs). Plus, there can be multiple different types of such cables for a single model of port. For example, in Samsung Galaxy Tab series, there is a 30-pin port, which can be connected to Serial(UART), Dedicated charger, USB (either as a host or client), Audio I/O, HDMI, Video I/O, and others. And the cable does not need to be 1-to-1 (Tab-to-USB, Tab-to-HDMI). There are cables that may connect Tab-to-USB-and-HDMI or Tab-to-Charger-and-A/V. In fact, among these 30 pins, there are independent pins for HDMI, pins for Audio, pins for charging, pins for USB, and others sharing ground/power pins, and a "multi-socket" 30-pin cable may simply open them up to other "standard" cables.
Cheers! MyungJoo
-- MyungJoo Ham, Ph.D. Mobile Software Platform Lab, DMC Business, Samsung Electronics -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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