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From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Hans de Goede <hdegoede@redhat.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Andy Shevchenko <andy@infradead.org>,
	linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
	platform-driver-x86@vger.kernel.org
Subject: [PATCH v5 09/16] device connection: Find connections also by checking the references
Date: Fri, 31 May 2019 17:15:40 +0300
Message-ID: <20190531141547.22728-10-heikki.krogerus@linux.intel.com> (raw)
In-Reply-To: <20190531141547.22728-1-heikki.krogerus@linux.intel.com>

We can also use this API to find named references that the
device nodes have by using fwnode_property_get_reference_args()
function.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/base/devcon.c     | 26 ++++++++++++++++++++++++++
 drivers/usb/roles/class.c |  2 +-
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/drivers/base/devcon.c b/drivers/base/devcon.c
index 04db9ae235e4..f7035fc12b92 100644
--- a/drivers/base/devcon.c
+++ b/drivers/base/devcon.c
@@ -38,6 +38,28 @@ fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
 	return NULL;
 }
 
+static void *
+fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
+		    void *data, devcon_match_fn_t match)
+{
+	struct device_connection con = { };
+	void *ret;
+	int i;
+
+	for (i = 0; ; i++) {
+		con.fwnode = fwnode_find_reference(fwnode, con_id, i);
+		if (IS_ERR(con.fwnode))
+			break;
+
+		ret = match(&con, -1, data);
+		fwnode_handle_put(con.fwnode);
+		if (ret)
+			return ret;
+	}
+
+	return NULL;
+}
+
 /**
  * device_connection_find_match - Find physical connection to a device
  * @dev: Device with the connection
@@ -65,6 +87,10 @@ void *device_connection_find_match(struct device *dev, const char *con_id,
 		ret = fwnode_graph_devcon_match(fwnode, con_id, data, match);
 		if (ret)
 			return ret;
+
+		ret = fwnode_devcon_match(fwnode, con_id, data, match);
+		if (ret)
+			return ret;
 	}
 
 	mutex_lock(&devcon_lock);
diff --git a/drivers/usb/roles/class.c b/drivers/usb/roles/class.c
index f45d8df5cfb8..86defca6623e 100644
--- a/drivers/usb/roles/class.c
+++ b/drivers/usb/roles/class.c
@@ -101,7 +101,7 @@ static void *usb_role_switch_match(struct device_connection *con, int ep,
 	struct device *dev;
 
 	if (con->fwnode) {
-		if (!fwnode_property_present(con->fwnode, con->id))
+		if (con->id && !fwnode_property_present(con->fwnode, con->id))
 			return NULL;
 
 		dev = class_find_device(role_class, NULL, con->fwnode,
-- 
2.20.1


  parent reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-31 14:15 [PATCH v5 00/16] Software fwnode references Heikki Krogerus
2019-05-31 14:15 ` [PATCH v5 01/16] software node: Allow node creation without properties Heikki Krogerus
2019-05-31 14:15 ` [PATCH v5 02/16] software node: Simplify software_node_release() function Heikki Krogerus
2019-05-31 14:15 ` [PATCH v5 03/16] software node: Add support for static node descriptors Heikki Krogerus
2019-05-31 14:15 ` [PATCH v5 04/16] software node: Use kobject name when finding child nodes by name Heikki Krogerus
2019-05-31 14:15 ` [PATCH v5 05/16] software node: Add software_node_get_reference_args() Heikki Krogerus
2019-05-31 14:15 ` [PATCH v5 06/16] driver core: Add helper device_find_child_by_name() Heikki Krogerus
2019-05-31 14:15 ` [PATCH v5 07/16] ACPI / property: Don't limit named child node matching to data nodes Heikki Krogerus
2019-05-31 14:15 ` [PATCH v5 08/16] device property: Introduce fwnode_find_reference() Heikki Krogerus
2019-05-31 14:15 ` Heikki Krogerus [this message]
2019-05-31 14:15 ` [PATCH v5 10/16] usb: typec: Registering real device entries for the muxes Heikki Krogerus
2019-05-31 14:15 ` [PATCH v5 11/16] platform/x86: intel_cht_int33fe: Register max17047 in its own function Heikki Krogerus
2019-05-31 14:15 ` [PATCH v5 12/16] platform/x86: intel_cht_int33fe: Remove unused fusb302 device property Heikki Krogerus
2019-05-31 14:15 ` [PATCH v5 13/16] platform/x86: intel_cht_int33fe: Provide software nodes for the devices Heikki Krogerus
2019-05-31 14:15 ` [PATCH v5 14/16] platform/x86: intel_cht_int33fe: Provide fwnode for the USB connector Heikki Krogerus
2019-05-31 14:15 ` [PATCH v5 15/16] platform/x86: intel_cht_int33fe: Supply fwnodes for the external dependencies Heikki Krogerus
2019-05-31 14:15 ` [PATCH v5 16/16] platform/x86: intel_cht_int33fe: Replacing the old connections with references Heikki Krogerus
2019-06-13 20:28 ` [PATCH v5 00/16] Software fwnode references Rafael J. Wysocki

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