linux-kernel - [PATCH 2/5] usb: typec: ucsi: glink: move GPIO reading into connector

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Message-Id: <20240408-ucsi-orient-aware-v1-2-95a74a163a10@linaro.org>
Date: Mon, 08 Apr 2024 07:30:50 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Neil Armstrong <neil.armstrong@...aro.org>, linux-usb@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: [PATCH 2/5] usb: typec: ucsi: glink: move GPIO reading into
 connector_status callback

To simplify the platform code move Type-C orientation handling into the
connector_status callback. As it is called both during connector
registration and on connector change events, duplicated code from
pmic_glink_ucsi_register() can be dropped.

Also this moves operations that can sleep into a worker thread,
removing the only sleeping operation from pmic_glink_ucsi_notify().

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 drivers/usb/typec/ucsi/ucsi_glink.c | 48 ++++++++++++++++---------------------
 1 file changed, 20 insertions(+), 28 deletions(-)

diff --git a/drivers/usb/typec/ucsi/ucsi_glink.c b/drivers/usb/typec/ucsi/ucsi_glink.c
index b91d2d15d7d9..d21f8cd2fe35 100644
--- a/drivers/usb/typec/ucsi/ucsi_glink.c
+++ b/drivers/usb/typec/ucsi/ucsi_glink.c
@@ -187,10 +187,28 @@ static int pmic_glink_ucsi_sync_write(struct ucsi *__ucsi, unsigned int offset,
 	return ret;
 }
 
+static void pmic_glink_ucsi_connector_status(struct ucsi_connector *con)
+{
+	struct pmic_glink_ucsi *ucsi = ucsi_get_drvdata(con->ucsi);
+	int orientation;
+
+	if (con->num >= PMIC_GLINK_MAX_PORTS ||
+	    !ucsi->port_orientation[con->num - 1])
+		return;
+
+	orientation = gpiod_get_value(ucsi->port_orientation[con->num - 1]);
+	if (orientation >= 0) {
+		typec_switch_set(ucsi->port_switch[con->num - 1],
+				 orientation ? TYPEC_ORIENTATION_REVERSE
+				 : TYPEC_ORIENTATION_NORMAL);
+	}
+}
+
 static const struct ucsi_operations pmic_glink_ucsi_ops = {
 	.read = pmic_glink_ucsi_read,
 	.sync_write = pmic_glink_ucsi_sync_write,
-	.async_write = pmic_glink_ucsi_async_write
+	.async_write = pmic_glink_ucsi_async_write,
+	.connector_status = pmic_glink_ucsi_connector_status,
 };
 
 static void pmic_glink_ucsi_read_ack(struct pmic_glink_ucsi *ucsi, const void *data, int len)
@@ -229,20 +247,8 @@ static void pmic_glink_ucsi_notify(struct work_struct *work)
 	}
 
 	con_num = UCSI_CCI_CONNECTOR(cci);
-	if (con_num) {
-		if (con_num <= PMIC_GLINK_MAX_PORTS &&
-		    ucsi->port_orientation[con_num - 1]) {
-			int orientation = gpiod_get_value(ucsi->port_orientation[con_num - 1]);
-
-			if (orientation >= 0) {
-				typec_switch_set(ucsi->port_switch[con_num - 1],
-						 orientation ? TYPEC_ORIENTATION_REVERSE
-							     : TYPEC_ORIENTATION_NORMAL);
-			}
-		}
-
+	if (con_num)
 		ucsi_connector_change(ucsi->ucsi, con_num);
-	}
 
 	if (ucsi->sync_pending &&
 		   (cci & (UCSI_CCI_ACK_COMPLETE | UCSI_CCI_COMMAND_COMPLETE))) {
@@ -253,20 +259,6 @@ static void pmic_glink_ucsi_notify(struct work_struct *work)
 static void pmic_glink_ucsi_register(struct work_struct *work)
 {
 	struct pmic_glink_ucsi *ucsi = container_of(work, struct pmic_glink_ucsi, register_work);
-	int orientation;
-	int i;
-
-	for (i = 0; i < PMIC_GLINK_MAX_PORTS; i++) {
-		if (!ucsi->port_orientation[i])
-			continue;
-		orientation = gpiod_get_value(ucsi->port_orientation[i]);
-
-		if (orientation >= 0) {
-			typec_switch_set(ucsi->port_switch[i],
-					 orientation ? TYPEC_ORIENTATION_REVERSE
-					     : TYPEC_ORIENTATION_NORMAL);
-		}
-	}
 
 	ucsi_register(ucsi->ucsi);
 }

-- 
2.39.2