linux-kernel - [PATCH v4 11/11] usb: typec: class: Remove both cable_match() and partner

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Message-Id: <20241211-const_dfc_done-v4-11-583cc60329df@quicinc.com>
Date: Wed, 11 Dec 2024 08:08:13 +0800
From: Zijun Hu <zijun_hu@...oud.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, 
 Uwe Kleine-König <ukleinek@...nel.org>, 
 James Bottomley <James.Bottomley@...senPartnership.com>, 
 Thomas Weißschuh <thomas@...ch.de>, 
 Zijun Hu <zijun_hu@...oud.com>, linux-kernel@...r.kernel.org, 
 nvdimm@...ts.linux.dev, linux-sound@...r.kernel.org, 
 sparclinux@...r.kernel.org, linux-block@...r.kernel.org, 
 linux-cxl@...r.kernel.org, linux1394-devel@...ts.sourceforge.net, 
 arm-scmi@...r.kernel.org, linux-efi@...r.kernel.org, 
 linux-gpio@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
 linux-mediatek@...ts.infradead.org, linux-hwmon@...r.kernel.org, 
 linux-media@...r.kernel.org, linux-pwm@...r.kernel.org, 
 linux-remoteproc@...r.kernel.org, linux-scsi@...r.kernel.org, 
 linux-usb@...r.kernel.org, linux-serial@...r.kernel.org, 
 netdev@...r.kernel.org, Zijun Hu <quic_zijuhu@...cinc.com>
Subject: [PATCH v4 11/11] usb: typec: class: Remove both cable_match() and
 partner_match()

From: Zijun Hu <quic_zijuhu@...cinc.com>

cable_match(), as matching function of device_find_child(), matches
a device with device type @typec_cable_dev_type, and its task can be
simplified by the recently introduced API device_match_type().

partner_match() is similar with cable_match() but with a different
device type @typec_partner_dev_type.

Remove both functions and use the API plus respective device type instead.

Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
---
 drivers/usb/typec/class.c | 27 ++++++++++++---------------
 1 file changed, 12 insertions(+), 15 deletions(-)

diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 601a81aa1e1024265f2359393dee531a7779c6ea..3a4e0bd0131774afd0d746d2f0a306190219feec 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -1282,11 +1282,6 @@ const struct device_type typec_cable_dev_type = {
 	.release = typec_cable_release,
 };
 
-static int cable_match(struct device *dev, const void *data)
-{
-	return is_typec_cable(dev);
-}
-
 /**
  * typec_cable_get - Get a reference to the USB Type-C cable
  * @port: The USB Type-C Port the cable is connected to
@@ -1298,7 +1293,8 @@ struct typec_cable *typec_cable_get(struct typec_port *port)
 {
 	struct device *dev;
 
-	dev = device_find_child(&port->dev, NULL, cable_match);
+	dev = device_find_child(&port->dev, &typec_cable_dev_type,
+				device_match_type);
 	if (!dev)
 		return NULL;
 
@@ -2028,16 +2024,12 @@ const struct device_type typec_port_dev_type = {
 /* --------------------------------------- */
 /* Driver callbacks to report role updates */
 
-static int partner_match(struct device *dev, const void *data)
-{
-	return is_typec_partner(dev);
-}
-
 static struct typec_partner *typec_get_partner(struct typec_port *port)
 {
 	struct device *dev;
 
-	dev = device_find_child(&port->dev, NULL, partner_match);
+	dev = device_find_child(&port->dev, &typec_partner_dev_type,
+				device_match_type);
 	if (!dev)
 		return NULL;
 
@@ -2170,7 +2162,9 @@ void typec_set_pwr_opmode(struct typec_port *port,
 	sysfs_notify(&port->dev.kobj, NULL, "power_operation_mode");
 	kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
 
-	partner_dev = device_find_child(&port->dev, NULL, partner_match);
+	partner_dev = device_find_child(&port->dev,
+					&typec_partner_dev_type,
+					device_match_type);
 	if (partner_dev) {
 		struct typec_partner *partner = to_typec_partner(partner_dev);
 
@@ -2334,7 +2328,9 @@ int typec_get_negotiated_svdm_version(struct typec_port *port)
 	enum usb_pd_svdm_ver svdm_version;
 	struct device *partner_dev;
 
-	partner_dev = device_find_child(&port->dev, NULL, partner_match);
+	partner_dev = device_find_child(&port->dev,
+					&typec_partner_dev_type,
+					device_match_type);
 	if (!partner_dev)
 		return -ENODEV;
 
@@ -2361,7 +2357,8 @@ int typec_get_cable_svdm_version(struct typec_port *port)
 	enum usb_pd_svdm_ver svdm_version;
 	struct device *cable_dev;
 
-	cable_dev = device_find_child(&port->dev, NULL, cable_match);
+	cable_dev = device_find_child(&port->dev, &typec_cable_dev_type,
+				      device_match_type);
 	if (!cable_dev)
 		return -ENODEV;
 

-- 
2.34.1