2009-03-17 02:57:38 SCCB(I2C) driver on GPIO not working
andy (UNITED STATES)
I had emulated SCCB (I2C) interface to a camera module on gpio pins in the 2006 uclinux release. I was using the pflags gpio device interface.
When I try running the same emulation code on the new kernel it fails to communicate with the module. I did make the necessary changes on the gpio front i.e. using the simple-gpio driver now. I have checked the gpio seperately and it works.
The SCCB code has a lot of timing sensitive code. Could it be that the previous pflags gpio interface and simple-gpio interface take different amount to time and hence is messing up the SCCB interface?
2009-03-17 04:16:21 SCCB(I2C) driver on GPIO not working
Michael Hennerich (GERMANY)
What you describe is a No-Go.
Use the kernel level gpio-based bitbang i2c driver
in conjunction with the user space i2c device interface.
There are some examples in