On 10/15/2012 04:09 AM, Bo Shen :

Hi Joachim Eastwood,

On 10/13/2012 1:42, Joachim Eastwood wrote:

quoted

Hi Bo Shen,

On Fri, Oct 12, 2012 at 11:42 AM, Bo Shen [off-list ref] wrote:

quoted

The i2c-gpio driver will turn the platform device ID to busnum.
When using platfrom device ID as -1, it means dynamically assigned
the busnum. When writing code, we need to make sure the busnum,
and call i2c_register_board_info(int busnum, ...) to register device
if using -1, we do not know the value of busnum.

In order to solve this issue, set the platform device ID as a fix number
Here using 0 to match the busnum used in i2c_regsiter_board_info().

I have been bitten by this myself on RM9200.

quoted

Signed-off-by: Bo Shen <redacted>
---
Change since v1
   Make the commit message more clear
---
  arch/arm/mach-at91/at91sam9260_devices.c |    2 +-

This pattern exist in at91rm9200_devices.c, at91sam9261_devices.c,
at91sam9263_devices.c and at91sam9rl_devices.c you might want to fix
them as well.

Thanks for your information.
After I test these boards, I will send patches to fix them, while not in
this patch.

I am in favor of doing a comprehensive patch series that covers all
aspects of this issue:
- each boards
- both i2c-gpio and i2c-at91 cases

Bye,
-- 
Nicolas Ferre