[PATCH] i2c: change the id to let the i2c device work

On 10/12/2012 13:53, Mark Brown wrote:

On Fri, Oct 12, 2012 at 01:45:48PM +0800, Bo Shen wrote:

quoted

On 10/12/2012 13:14, Mark Brown wrote:

quoted

quoted

No, this still makes no sense to me.  This is clearly a non-DT device
registration, what does DT have to do with anything here?  What is the

quoted

Yes, this is non-DT device registration.
As the Linux kernel code is transferring to DT which doesn't use
platform device id. however here, modified unconsciously. So correct
this error.

What error and what does DT have to do with any of this?  DT has no
impact on non-DT systems.

Yes. This has nothing to do with DT.

quoted

quoted

practical problem you are seeing in your system and how does this help
with it?

quoted

In non-DT kernel, we use platform device id to distinguish between
each device.

quoted

So, in this case, if the id = -1, i2c core will dynamically assign a
bus id to this bus when running, the dynamically assigned bus id is
unknown when writing the code. So, when we use
i2c_register_board_info(int busnum, ...) to register device on
busnum. we don't know which value to be use.

The I2C bus number assigned to the controller should be independant of
the platform device ID used to register the device; a better fix if this
is an issue would be to update the i2c-gpio driver to allow a fixed bus
number to be specified in platform data.

Hi Haavard Skinnemoen,
   Do you have any suggestions about this?
   Thanks.

BRs,
Bo Shen