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usb: typec: Add partner PD object wrapper

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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.

Cc: Benson Leung <bleung@chromium.org>
Suggested-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Link: https://lore.kernel.org/r/20221122220538.2991775-2-pmalani@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Prashant Malani 2022-11-22 22:05:36 +00:00 committed by Greg Kroah-Hartman
parent 03a88b0baf
commit 032399819d
2 changed files with 23 additions and 0 deletions
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19
drivers/usb/typec/class.c
View file

@ -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

4
include/linux/usb/typec.h
View file

@ -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);