linux-kernel - [PATCH v2 03/12] property: Call fwnode_graph_get_endpoint_by

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Message-Id: <20201217234337.1983732-4-djrscally@gmail.com>
Date:   Thu, 17 Dec 2020 23:43:28 +0000
From:   Daniel Scally <djrscally@...il.com>
To:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-media@...r.kernel.org, devel@...ica.org
Cc:     rjw@...ysocki.net, lenb@...nel.org, gregkh@...uxfoundation.org,
        yong.zhi@...el.com, sakari.ailus@...ux.intel.com,
        bingbu.cao@...el.com, tian.shu.qiu@...el.com, mchehab@...nel.org,
        robert.moore@...el.com, erik.kaneda@...el.com, pmladek@...e.com,
        rostedt@...dmis.org, sergey.senozhatsky@...il.com,
        andriy.shevchenko@...ux.intel.com, linux@...musvillemoes.dk,
        laurent.pinchart+renesas@...asonboard.com,
        jacopo+renesas@...ndi.org, kieran.bingham+renesas@...asonboard.com,
        linus.walleij@...aro.org, heikki.krogerus@...ux.intel.com,
        kitakar@...il.com, jorhand@...ux.microsoft.com,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: [PATCH v2 03/12] property: Call fwnode_graph_get_endpoint_by_id() for fwnode->secondary

This function is used to find fwnode endpoints against a device. In
some instances those endpoints are software nodes which are children of
fwnode->secondary. Add support to fwnode_graph_get_endpoint_by_id() to
find those endpoints by recursively calling itself passing the ptr to
fwnode->secondary in the event no endpoint is found for the primary.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Signed-off-by: Daniel Scally <djrscally@...il.com>
---
Changes in v2:

	- Some rearranging of the conditionals

 drivers/base/property.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/base/property.c b/drivers/base/property.c
index bc9c634df6df..ddba75d90af2 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -1163,7 +1163,14 @@ fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode,
 		best_ep_id = fwnode_ep.id;
 	}
 
-	return best_ep;
+	if (best_ep)
+		return best_ep;
+
+	if (fwnode && !IS_ERR_OR_NULL(fwnode->secondary))
+		return fwnode_graph_get_endpoint_by_id(fwnode->secondary, port,
+						       endpoint, flags);
+
+	return NULL;
 }
 EXPORT_SYMBOL_GPL(fwnode_graph_get_endpoint_by_id);
 
-- 
2.25.1