linux-kernel - [PATCH v2 1/2] usb: typec: tcpci: Add tcpc chip level callbacks

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Message-Id: <20210312052443.3797674-1-badhri@google.com>
Date:   Thu, 11 Mar 2021 21:24:42 -0800
From:   Badhri Jagan Sridharan <badhri@...gle.com>
To:     Guenter Roeck <linux@...ck-us.net>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kyle Tso <kyletso@...gle.com>,
        Badhri Jagan Sridharan <badhri@...gle.com>
Subject: [PATCH v2 1/2] usb: typec: tcpci: Add tcpc chip level callbacks

This change adds chip callbacks for the following operations:
1. Notifying port role
2. Notifying orientation

Signed-off-by: Badhri Jagan Sridharan <badhri@...gle.com>
---
Changes since V1:
- Dropped changes related to get_/set_current_limit and pd_capable
  callback. Will send them in as separate patches.
---
 drivers/usb/typec/tcpm/tcpci.c | 12 +++++++++++-
 drivers/usb/typec/tcpm/tcpci.h | 10 ++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
index 027afd7dfdce..c37bbb2e9961 100644
--- a/drivers/usb/typec/tcpm/tcpci.c
+++ b/drivers/usb/typec/tcpm/tcpci.c
@@ -265,9 +265,16 @@ static int tcpci_set_polarity(struct tcpc_dev *tcpc,
 	if (ret < 0)
 		return ret;
 
-	return regmap_write(tcpci->regmap, TCPC_TCPC_CTRL,
+	ret = regmap_write(tcpci->regmap, TCPC_TCPC_CTRL,
 			   (polarity == TYPEC_POLARITY_CC2) ?
 			   TCPC_TCPC_CTRL_ORIENTATION : 0);
+	if (ret < 0)
+		return ret;
+
+	if (tcpci->data->set_cc_polarity)
+		tcpci->data->set_cc_polarity(tcpci, tcpci->data, polarity);
+
+	return ret;
 }
 
 static void tcpci_set_partner_usb_comm_capable(struct tcpc_dev *tcpc, bool capable)
@@ -395,6 +402,9 @@ static int tcpci_set_roles(struct tcpc_dev *tcpc, bool attached,
 	if (ret < 0)
 		return ret;
 
+	if (tcpci->data->set_roles)
+		tcpci->data->set_roles(tcpci, tcpci->data, attached, role, data);
+
 	return 0;
 }
 
diff --git a/drivers/usb/typec/tcpm/tcpci.h b/drivers/usb/typec/tcpm/tcpci.h
index 57b6e24e0a0c..75a2c9b575b5 100644
--- a/drivers/usb/typec/tcpm/tcpci.h
+++ b/drivers/usb/typec/tcpm/tcpci.h
@@ -165,6 +165,12 @@ struct tcpci;
  *		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.
+ * @set_roles:
+ *		Optional; This callback notifies the TCPC driver of the resolved
+ *		port role and attached status.
+ * @set_cc_polarity:
+ *		Optional; This callback notifies the TCPC driver of the resolved
+ *		polarity.
  */
 struct tcpci_data {
 	struct regmap *regmap;
@@ -181,6 +187,10 @@ struct tcpci_data {
 	void (*frs_sourcing_vbus)(struct tcpci *tcpci, struct tcpci_data *data);
 	void (*set_partner_usb_comm_capable)(struct tcpci *tcpci, struct tcpci_data *data,
 					     bool capable);
+	void (*set_roles)(struct tcpci *tcpci, struct tcpci_data *data, bool attached,
+			  enum typec_role role, enum typec_data_role data_role);
+	void (*set_cc_polarity)(struct tcpci *tcpci, struct tcpci_data *data,
+				enum typec_cc_polarity polarity);
 };
 
 struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data);
-- 
2.31.0.rc2.261.g7f71774620-goog