linux-kernel - [PATCH v3 24/30] coresight: platform: Use fwnode handle for device search

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Message-Id: <1557226378-10131-25-git-send-email-suzuki.poulose@arm.com>
Date:   Tue,  7 May 2019 11:52:51 +0100
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, coresight@...ts.linaro.org,
        rjw@...ysocki.net, mathieu.poirier@...aro.org,
        Suzuki K Poulose <suzuki.poulose@....com>
Subject: [PATCH v3 24/30] coresight: platform: Use fwnode handle for device search

We match of_node while searching for a device. Make this
more generic in preparation for the ACPI support by using
fwnode_handle.

Cc: Mathieu Poirier <mathieu.poirier@...aro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
---
Change since v2:
 - Drop the generic helper. It requires further clean up,
   and will be dealt with a separate series.
---
 drivers/hwtracing/coresight/coresight-platform.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c
index 53d6eed..4394095 100644
--- a/drivers/hwtracing/coresight/coresight-platform.c
+++ b/drivers/hwtracing/coresight/coresight-platform.c
@@ -36,14 +36,13 @@ static int coresight_alloc_conns(struct device *dev,
 	return 0;
 }
 
-#ifdef CONFIG_OF
-static int of_dev_node_match(struct device *dev, void *data)
+static int coresight_device_fwnode_match(struct device *dev, void *fwnode)
 {
-	return dev->of_node == data;
+	return dev_fwnode(dev) == fwnode;
 }
 
 static struct device *
-of_coresight_get_endpoint_device(struct device_node *endpoint)
+coresight_find_device_by_fwnode(struct fwnode_handle *fwnode)
 {
 	struct device *dev = NULL;
 
@@ -52,7 +51,7 @@ of_coresight_get_endpoint_device(struct device_node *endpoint)
 	 * platform bus.
 	 */
 	dev = bus_find_device(&platform_bus_type, NULL,
-			      endpoint, of_dev_node_match);
+			      fwnode, coresight_device_fwnode_match);
 	if (dev)
 		return dev;
 
@@ -61,9 +60,10 @@ of_coresight_get_endpoint_device(struct device_node *endpoint)
 	 * looking for the device that matches the endpoint node.
 	 */
 	return bus_find_device(&amba_bustype, NULL,
-			       endpoint, of_dev_node_match);
+			       fwnode, coresight_device_fwnode_match);
 }
 
+#ifdef CONFIG_OF
 static inline bool of_coresight_legacy_ep_is_input(struct device_node *ep)
 {
 	return of_property_read_bool(ep, "slave-mode");
@@ -191,6 +191,7 @@ static int of_coresight_parse_endpoint(struct device *dev,
 	struct device_node *rparent = NULL;
 	struct device_node *rep = NULL;
 	struct device *rdev = NULL;
+	struct fwnode_handle *rdev_fwnode;
 
 	do {
 		/* Parse the local port details */
@@ -209,8 +210,9 @@ static int of_coresight_parse_endpoint(struct device *dev,
 		if (of_graph_parse_endpoint(rep, &rendpoint))
 			break;
 
+		rdev_fwnode = of_fwnode_handle(rparent);
 		/* If the remote device is not available, defer probing */
-		rdev = of_coresight_get_endpoint_device(rparent);
+		rdev = coresight_find_device_by_fwnode(rdev_fwnode);
 		if (!rdev) {
 			ret = -EPROBE_DEFER;
 			break;
-- 
2.7.4