usb: typec: tcpm: Add Callback to Usb Communication capable partner

The USB Communications Capable bit indicates if port
partner is capable of communication over the USB data lines
(e.g. D+/- or SS Tx/Rx). Notify the status of the bit to low
level drivers to perform chip specific operation.
For instance, low level driver enables USB switches on D+/D-
lines to set up data path when the bit is set.

Refactored from patch initially authored by
Kyle Tso <[email protected]>

Reviewed-by: Heikki Krogerus <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Signed-off-by: Badhri Jagan Sridharan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h
index 3af99f85e8b9..42fcfbe10590 100644
--- a/include/linux/usb/tcpm.h
+++ b/include/linux/usb/tcpm.h
@@ -108,6 +108,10 @@ enum tcpm_transmit_type {
  *		is supported by TCPC, set this callback for TCPM to query
  *		whether vbus is at VSAFE0V when needed.
  *		Returns true when vbus is at VSAFE0V, false otherwise.
+ * @set_partner_usb_comm_capable:
+ *              Optional; The USB Communications Capable bit indicates if port
+ *              partner is capable of communication over the USB data lines
+ *              (e.g. D+/- or SS Tx/Rx). Called to notify the status of the bit.
  */
 struct tcpc_dev {
 	struct fwnode_handle *fwnode;
@@ -139,6 +143,7 @@ struct tcpc_dev {
 	int (*set_auto_vbus_discharge_threshold)(struct tcpc_dev *dev, enum typec_pwr_opmode mode,
 						 bool pps_active, u32 requested_vbus_voltage);
 	bool (*is_vbus_vsafe0v)(struct tcpc_dev *dev);
+	void (*set_partner_usb_comm_capable)(struct tcpc_dev *dev, bool enable);
 };
 
 struct tcpm_port;