Hi, Thanks for the response. One more question that I have is if the devices on the two buses can use the same i2c address. That is the case for my board. So wondering if this works as well. Murali Karicheri Software Design Engineer Texas Instruments Inc. Germantown, MD 20874 phone: 301-407-9583 email: m-karicheri2@xxxxxx >-----Original Message----- >From: HoP [mailto:jpetrous@xxxxxxxxx] >Sent: Thursday, December 10, 2009 4:16 PM >To: Karicheri, Muralidharan >Cc: Daniel Glöckner; linux-media@xxxxxxxxxxxxxxx >Subject: Re: Latest stack that can be merged on top of linux-next tree > >Hi, > >2009/12/10 Karicheri, Muralidharan <m-karicheri2@xxxxxx>: >> 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? > >Yes, exactly that is way of using - additional i2c buses were born when >pca954x >started. > >Daniel already described this in his mail: > >"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." > >Additional i2c buses (adapters) were counted from number +1 higher >then highest i2c bus number. If you main i2c bus is i2c-1, then you >you should find i2c-2,i2c-3,i2c-4,i2c-5 new buses after pca954x loading. > >You can check that with i2cdetect tools. > >> >> How do I use this with MT9T031 driver? Any idea to share? >> > >I never had a look inside mt9t031 driver, but in general - you simply >point to some of that additional adaper by i2c_get_adapter(x) > >Idea is very smart. You don't need to manage pca954x on your own. >Driver do it itself :) > >/Honza -- 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
