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

Hi Jean Delvare,

On 10/12/2012 15:14, Jean Delvare wrote:

On Fri, 12 Oct 2012 14:53:02 +0900, Mark Brown wrote:

quoted

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

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.

i2c-gpio does support this already.

vim I only see the i2c-gpio platform data structure as following:
--<---------------------
struct i2c_gpio_platform_data {
	unsigned int	sda_pin;
	unsigned int	scl_pin;
	int		udelay;
	int		timeout;
	unsigned int	sda_is_open_drain:1;
	unsigned int	scl_is_open_drain:1;
	unsigned int	scl_is_output_only:1;
};
-->---------------------

So, how to allow a fixed bus number to be specified in platform data?