[PATCH v9 10/15] usb: typec: tcpci: frs sourcing vbus callback

[Badhri Jagan Sridharan]

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

Signed-off-by: Badhri Jagan Sridharan <bad...@google.com>
---
v9 is the first version of this patch in the series. Added to fix
occasional bug of vbus turning back on when disconnecting the FRS accessory
after disconnect.
---
 drivers/usb/typec/tcpm/tcpci.c | 9 +++++++++
 drivers/usb/typec/tcpm/tcpci.h | 4 ++++
 2 files changed, 13 insertions(+)

diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
index f9f0af64da5f..f91688e43991 100644
--- a/drivers/usb/typec/tcpm/tcpci.c
+++ b/drivers/usb/typec/tcpm/tcpci.c
@@ -284,6 +284,14 @@ static int tcpci_enable_frs(struct tcpc_dev *dev, bool 
enable)
        return ret;
 }
 
+static void tcpci_frs_sourcing_vbus(struct tcpc_dev *dev)
+{
+       struct tcpci *tcpci = tcpc_to_tcpci(dev);
+
+       if (tcpci->data->frs_sourcing_vbus)
+               tcpci->data->frs_sourcing_vbus(tcpci, tcpci->data);
+}
+
 static int tcpci_set_bist_data(struct tcpc_dev *tcpc, bool enable)
 {
        struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
@@ -628,6 +636,7 @@ struct tcpci *tcpci_register_port(struct device *dev, 
struct tcpci_data *data)
        tcpci->tcpc.pd_transmit = tcpci_pd_transmit;
        tcpci->tcpc.set_bist_data = tcpci_set_bist_data;
        tcpci->tcpc.enable_frs = tcpci_enable_frs;
+       tcpci->tcpc.frs_sourcing_vbus = tcpci_frs_sourcing_vbus;
 
        err = tcpci_parse_config(tcpci);
        if (err < 0)
diff --git a/drivers/usb/typec/tcpm/tcpci.h b/drivers/usb/typec/tcpm/tcpci.h
index 5ef07a56d67a..b418fe11b527 100644
--- a/drivers/usb/typec/tcpm/tcpci.h
+++ b/drivers/usb/typec/tcpm/tcpci.h
@@ -143,6 +143,9 @@
 /*
  * @TX_BUF_BYTE_x_hidden
  *             optional; Set when TX_BUF_BYTE_x can only be accessed through 
I2C_WRITE_BYTE_COUNT.
+ * @frs_sourcing_vbus:
+ *             Optional; Callback to perform chip specific operations when FRS
+ *             is sourcing vbus.
  */
 struct tcpci;
 struct tcpci_data {
@@ -154,6 +157,7 @@ struct tcpci_data {
        int (*start_drp_toggling)(struct tcpci *tcpci, struct tcpci_data *data,
                                  enum typec_cc_status cc);
        int (*set_vbus)(struct tcpci *tcpci, struct tcpci_data *data, bool 
source, bool sink);
+       void (*frs_sourcing_vbus)(struct tcpci *tcpci, struct tcpci_data *data);
 };
 
 struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data);
-- 
2.28.0.709.gb0816b6eb0-goog