Re: [PATCH i2c-next v3 1/3] dt-bindings: i2c: aspeed: Add 'timeout' property as an optional property

[Rob Herring <robh@kernel.org>]

On Wed, Sep 26, 2018 at 02:58:40PM -0700, Jae Hyun Yoo wrote:
> This commit adds 'aspeed,timeout' property as an optional property
> which can be used for setting 'timeout' value of
> 'struct i2c_adapter'. With this patch, the timeout value can be
> set through an I2C_TIMEOUT ioctl on cdev, or through this optional
> DT property.

Isn't controlling this from userspace or relying on a default 
sufficient?  I can't see this needing to be highly tuned for each 
platform.

However, if we do have a property, it should be common.

> 
> Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
> ---
>  Documentation/devicetree/bindings/i2c/i2c-aspeed.txt | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-aspeed.txt b/Documentation/devicetree/bindings/i2c/i2c-aspeed.txt
> index 8fbd8633a387..d6965b360fbc 100644
> --- a/Documentation/devicetree/bindings/i2c/i2c-aspeed.txt
> +++ b/Documentation/devicetree/bindings/i2c/i2c-aspeed.txt
> @@ -17,6 +17,9 @@ Optional Properties:
>  		  specified
>  - multi-master	: states that there is another master active on this bus.
>  
> +- aspeed,timeout : I2C bus timeout in microseconds defaults to 5 seconds when
> +		   not specified.
> +
>  Example:
>  
>  i2c {
> -- 
> 2.19.0
>