Hi, Thanks for the email. Any idea how i2c drivers can work with this? Currently in my board, I have adapter id = 1 for main i2c bus. So when this mux driver is built into the kernel, I guess I can access it using a different adapter id, right? If so, what is the adapter id? How do I use this with MT9T031 driver? Any idea to share? Thanks Murali Karicheri Software Design Engineer Texas Instruments Inc. Germantown, MD 20874 phone: 301-407-9583 email: m-karicheri2@xxxxxx >-----Original Message----- >From: Daniel Glöckner [mailto:dg@xxxxxxxxx] >Sent: Thursday, December 10, 2009 3:15 PM >To: HoP >Cc: Karicheri, Muralidharan; linux-media@xxxxxxxxxxxxxxx >Subject: Re: Latest stack that can be merged on top of linux-next tree > >Hi, > >On 12/10/2009 08:39 PM, HoP wrote: >> 2009/12/10 Karicheri, Muralidharan <m-karicheri2@xxxxxx>: >>> BTW, Is there a driver for the PCA9543 i2c switch that is part of >MT9T031 >>> headboard? >>> >> >> I would like to know answer also :) >> >> I had to add support for pca9542 (what is 2 port switch) for our project. >> After some googling I found some patches for similar kernel I was >> working on (2.6.22). You can find original patches for example there: >> http://www.mail-archive.com/i2c@xxxxxxxxxxxxxx/msg00315.html >> >> FYI, the driver pca954x.c seems to be driver for full family of i2c >> muxes/switches. Such code works fine for me. >> >> The only thing I didn't find was why the code was never merged. > >the driver that has the greatest chance of being accepted has been >discussed >on the linux-i2c list a few days ago: > >http://thread.gmane.org/gmane.linux.drivers.i2c/4856 > >The patchset they are talking about is this one: > >http://thread.gmane.org/gmane.linux.drivers.i2c/2998 > >With these patches the bus segments beyond the i2c multiplexer will be >registered as separate i2c busses. Access to a device on those busses >will then automatically reconfigure the multiplexer. > > >Last time we tried to enable only one channel of the pca9543 on the mt9d131 >board it had an effect on the brightness. Unfortunately we don't have the >schematics of the head board. Can anyone explain what was going on there? > > Daniel > >-- >Dipl.-Math. Daniel Glöckner, emlix GmbH, http://www.emlix.com >Fon +49 551 30664-0, Fax -11, Bahnhofsallee 1b, 37081 Göttingen, Germany >Sitz der Gesellschaft: Göttingen, Amtsgericht Göttingen HR B 3160 >Geschäftsführer: Dr. Uwe Kracke, Ust-IdNr.: DE 205 198 055 > >emlix - your embedded linux partner -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
