On Fri, 2016-06-10 at 17:34 +0300, Heikki Krogerus wrote:
> +static ssize_t
> +preferred_role_store(struct device *dev, struct device_attribute
> *attr,
> + const char *buf, size_t size)
> +{
> + struct typec_port *port = to_typec_port(dev);
> + enum typec_role role;
> + int ret;
> +
> + mutex_lock(&port->lock);
> +
> + if (port->cap->type != TYPEC_PORT_DRP) {
> + dev_dbg(dev, "Try.SRC/SNK only supported with DRP
> ports\n");
> + ret = -EOPNOTSUPP;
> + goto out;
> + }
I think Try.SNK with an UFP should fail differently from
Try.SRC and vice versa.
And, even more importantly, this offeres no way to cancel
a preference.
Regards
Oliver
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