[PATCH v4 1/9] phy: add phy_get_bus_width()/phy_set_bus_width() calls

[Russell King - ARM Linux]

On Thu, Dec 12, 2013 at 06:18:29AM -0500, Matt Porter wrote:
>  /**
> + * struct phy_attrs - represents phy attributes
> + * @bus_width: Data path width implemented by PHY
> + */
> +struct phy_attrs {
> +	u32			bus_width;

Why u32?

>  int phy_power_off(struct phy *phy);
> +static inline u32 phy_get_bus_width(struct phy *phy)
> +{
> +	return phy->attrs.bus_width;
...
>  
> +static inline u32 phy_get_bus_width(struct phy *phy)
> +{
> +	return -ENOSYS;

Why u32, especially as you're returning a negative number here.

If the bus width is a small integer (I'm assuming you don't have up to
2^30 bus signals) then what's wrong with it being an 'int' ?