Re: [PATCH] of_i2c: I2C child node 10-bit client addressing

[Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>]

On Fri, 12 Oct 2012 09:12:48 +0530, Bharat Reddy <bharat_404-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org> wrote:
> I2C clients which has 10 bit address, struct i2c_board_info,
> member "flags = I2C_CLIENT_TEN" is needed.
> 
> Signed-off-by: Bharat Kumar Reddy Gooty <bharat_404-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org>
> ---
>  drivers/of/of_i2c.c |    4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c
> index 1e173f3..9cda7e2 100644
> --- a/drivers/of/of_i2c.c
> +++ b/drivers/of/of_i2c.c
> @@ -57,6 +57,10 @@ void of_i2c_register_devices(struct i2c_adapter *adap)
>                         continue;
>                 }   
>  
> +               /* Support for i2c 10 bit client address */
> +               if ((info.addr > (1 << 7) - 1) && (info.addr <= (1 << 10) - 1))
> +                       info.flags = I2C_CLIENT_TEN;
> +

Is it possible for a device to have an address that fits in the first 7
bits, but still requires 10 bit address transactions?

g.