Re: Problem with multiple i2c multiplexers on the same bus

2014-11-02 Thread Wolfram Sang
> I rediscovered this series: > > http://www.spinics.net/lists/linux-i2c/msg11542.html > ("i2c-mux: expose i2c bus topology under sysfs") > > From a glimpse, I like this approach better. I wonder if we can maintain > backward compatibility somehow. I need to play with it. But not today, > this h

Re: Problem with multiple i2c multiplexers on the same bus

2014-10-31 Thread Guenter Roeck
On 10/31/2014 02:45 PM, Martin Belanger wrote: Hi all, and thanks for your response. You are correct Guenter. We need to address both i2c- and gpio-based multiplexers. You and Jean suggested the following solution: I2C Mux: i2c-N-mux-i2c-XX (chan_id M) GPIO Mux: i2c-N-mux-gpio-XX (chan_id M)

Re: Problem with multiple i2c multiplexers on the same bus

2014-10-31 Thread Wolfram Sang
> You are correct Guenter. We need to address both i2c- and gpio-based > multiplexers. You and Jean suggested the following solution: > > I2C Mux: i2c-N-mux-i2c-XX (chan_id M) > GPIO Mux: i2c-N-mux-gpio-XX (chan_id M) > > Where XX is the i2c address or the first GPIO pin number. This > ensur

Re: Problem with multiple i2c multiplexers on the same bus

2014-10-31 Thread Martin Belanger
Hi all, and thanks for your response. You are correct Guenter. We need to address both i2c- and gpio-based multiplexers. You and Jean suggested the following solution: I2C Mux: i2c-N-mux-i2c-XX (chan_id M) GPIO Mux: i2c-N-mux-gpio-XX (chan_id M) Where XX is the i2c address or the first GPIO p

Re: Problem with multiple i2c multiplexers on the same bus

2014-10-31 Thread Guenter Roeck
On 10/31/2014 02:03 PM, Wolfram Sang wrote: Hi, On Mon, Oct 27, 2014 at 11:46:01AM -0700, Martin Belanger wrote: This is regarding a series of emails between Guenter Roeck and Jean Delvare titled "Problem with multiple i2c multiplexers on one bus, and mux bus naming" sent in November 2013. Ref:

Re: Problem with multiple i2c multiplexers on the same bus

2014-10-31 Thread Wolfram Sang
Hi, On Mon, Oct 27, 2014 at 11:46:01AM -0700, Martin Belanger wrote: > This is regarding a series of emails between Guenter Roeck and Jean > Delvare titled "Problem with multiple i2c multiplexers on one bus, and > mux bus naming" sent in November 2013. Ref: > http://thread.gmane.org/gmane.linux.dr

Problem with multiple i2c multiplexers on the same bus

2014-10-27 Thread Martin Belanger
This is regarding a series of emails between Guenter Roeck and Jean Delvare titled "Problem with multiple i2c multiplexers on one bus, and mux bus naming" sent in November 2013. Ref: http://thread.gmane.org/gmane.linux.drivers.i2c/16980 I'm having the same problem with multiple PCA954x multiplexer