[v9,09/15] usb: typec: tcpm: frs sourcing vbus callback

Commit Message

Badhri Jagan Sridharan Sept. 29, 2020, 2:39 a.m. UTC

During FRS hardware autonomously starts to source vbus. Provide
callback to perform chip specific operations.

Signed-off-by: Badhri Jagan Sridharan <[e-mail]>
---
 drivers/usb/typec/tcpm/tcpm.c | 9 +++++++++
 include/linux/usb/tcpm.h      | 4 ++++
 2 files changed, 13 insertions(+)

Patch

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 55535c4f66bf..02b7f623f584 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -4090,7 +4090,16 @@  static void _tcpm_pd_vbus_on(struct tcpm_port *port)
 	case SRC_TRY_DEBOUNCE:
 		/* Do nothing, waiting for sink detection */
 		break;
+	case FR_SWAP_SEND:
+	case FR_SWAP_SEND_TIMEOUT:
+	case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
+	case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED:
+		if (port->tcpc->frs_sourcing_vbus)
+			port->tcpc->frs_sourcing_vbus(port->tcpc);
+		break;
 	case FR_SWAP_SNK_SRC_NEW_SINK_READY:
+		if (port->tcpc->frs_sourcing_vbus)
+			port->tcpc->frs_sourcing_vbus(port->tcpc);
 		tcpm_set_state(port, FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED, 0);
 		break;
 
diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h
index 09762d26fa0c..7303f518ba49 100644
--- a/include/linux/usb/tcpm.h
+++ b/include/linux/usb/tcpm.h
@@ -83,6 +83,9 @@  enum tcpm_transmit_type {
  *		Optional; Called to enable/disable PD 3.0 fast role swap.
  *		Enabling frs is accessory dependent as not all PD3.0
  *		accessories support fast role swap.
+ * @frs_sourcing_vbus:
+ *		Optional; Called to notify that vbus is now being sourced.
+ *		Low level drivers can perform chip specific operations, if any.
  */
 struct tcpc_dev {
 	struct fwnode_handle *fwnode;
@@ -109,6 +112,7 @@  struct tcpc_dev {
 			   const struct pd_message *msg);
 	int (*set_bist_data)(struct tcpc_dev *dev, bool on);
 	int (*enable_frs)(struct tcpc_dev *dev, bool enable);
+	void (*frs_sourcing_vbus)(struct tcpc_dev *dev);
 };
 
 struct tcpm_port;