On Tue, Nov 22, 2022 at 10:05:36PM +0000, Prashant Malani wrote:
> Some port drivers may want to set a Type-C partner as a parent for a
> USB Power Delivery object, but the Type-C partner struct isn't exposed
> outside of the Type-C class driver. Add a wrapper to
> usb_power_delivery_register() which sets the provided Type-C partner
> as a parent to the USB PD object. This helps to avoid exposing the
> Type-C partner's device struct unnecessarily.
>
> Suggested-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
> Cc: Benson Leung <bleung@xxxxxxxxxxxx>
> Signed-off-by: Prashant Malani <pmalani@xxxxxxxxxxxx>
Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
> ---
>
> Changes since v1:
> - Patch first introduced in v2.
>
> drivers/usb/typec/class.c | 19 +++++++++++++++++++
> include/linux/usb/typec.h | 4 ++++
> 2 files changed, 23 insertions(+)
>
> diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
> index bd5e5dd70431..5897905cb4f0 100644
> --- a/drivers/usb/typec/class.c
> +++ b/drivers/usb/typec/class.c
> @@ -821,6 +821,25 @@ void typec_partner_set_svdm_version(struct typec_partner *partner,
> }
> EXPORT_SYMBOL_GPL(typec_partner_set_svdm_version);
>
> +/**
> + * typec_partner_usb_power_delivery_register - Register Type-C partner USB Power Delivery Support
> + * @partner: Type-C partner device.
> + * @desc: Description of the USB PD contract.
> + *
> + * This routine is a wrapper around usb_power_delivery_register(). It registers
> + * USB Power Delivery Capabilities for a Type-C partner device. Specifically,
> + * it sets the Type-C partner device as a parent for the resulting USB Power Delivery object.
> + *
> + * Returns handle to struct usb_power_delivery or ERR_PTR.
> + */
> +struct usb_power_delivery *
> +typec_partner_usb_power_delivery_register(struct typec_partner *partner,
> + struct usb_power_delivery_desc *desc)
> +{
> + return usb_power_delivery_register(&partner->dev, desc);
> +}
> +EXPORT_SYMBOL_GPL(typec_partner_usb_power_delivery_register);
> +
> /**
> * typec_register_partner - Register a USB Type-C Partner
> * @port: The USB Type-C Port the partner is connected to
> diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
> index 7751bedcae5d..8fa781207970 100644
> --- a/include/linux/usb/typec.h
> +++ b/include/linux/usb/typec.h
> @@ -23,6 +23,7 @@ struct fwnode_handle;
> struct device;
>
> struct usb_power_delivery;
> +struct usb_power_delivery_desc;
>
> enum typec_port_type {
> TYPEC_PORT_SRC,
> @@ -327,6 +328,9 @@ void typec_partner_set_svdm_version(struct typec_partner *partner,
> enum usb_pd_svdm_ver svdm_version);
> int typec_get_negotiated_svdm_version(struct typec_port *port);
>
> +struct usb_power_delivery *typec_partner_usb_power_delivery_register(struct typec_partner *partner,
> + struct usb_power_delivery_desc *desc);
> +
> int typec_port_set_usb_power_delivery(struct typec_port *port, struct usb_power_delivery *pd);
> int typec_partner_set_usb_power_delivery(struct typec_partner *partner,
> struct usb_power_delivery *pd);
thanks,
--
heikki
