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From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
To: linux-media@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org,
	"Sakari Ailus" <sakari.ailus@iki.fi>,
	"Jacopo Mondi" <jacopo+renesas@jmondi.org>,
	"Niklas Söderlund" <niklas.soderlund@ragnatech.se>,
	"Kieran Bingham" <kieran.bingham+renesas@ideasonboard.com>,
	"Lad Prabhakar" <prabhakar.csengg@gmail.com>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>
Subject: [PATCH v4 1/4] device property: Add a function to test is a fwnode is a graph endpoint
Date: Wed,  1 Jul 2020 09:21:37 +0300
Message-ID: <20200701062140.12953-2-laurent.pinchart+renesas@ideasonboard.com> (raw)
In-Reply-To: <20200701062140.12953-1-laurent.pinchart+renesas@ideasonboard.com>

Drivers may need to test if a fwnode is a graph endpoint. To avoid
hand-written solutions that wouldn't work for all fwnode types, add a
new fwnode_graph_is_endpoint() function for this purpose. We don't need
to wire it up to different backends for OF and ACPI for now, as the
implementation can simply be based on checkout the presence of a
remote-endpoint property.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 include/linux/property.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/property.h b/include/linux/property.h
index 10d03572f52e..9f805c442819 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -389,6 +389,11 @@ struct fwnode_handle *
 fwnode_graph_get_remote_node(const struct fwnode_handle *fwnode, u32 port,
 			     u32 endpoint);
 
+static inline bool fwnode_graph_is_endpoint(struct fwnode_handle *fwnode)
+{
+	return fwnode_property_present(fwnode, "remote-endpoint");
+}
+
 /*
  * Fwnode lookup flags
  *
-- 
Regards,

Laurent Pinchart


  reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-01  6:21 [PATCH v4 0/4] media: v4l2-async: Accept endpoints and devices for fwnode matching Laurent Pinchart
2020-07-01  6:21 ` Laurent Pinchart [this message]
2020-07-01  7:34   ` [PATCH v4 1/4] device property: Add a function to test is a fwnode is a graph endpoint Sakari Ailus
2020-07-01 12:19     ` Rafael J. Wysocki
2020-07-15 20:57       ` Sakari Ailus
2020-07-17  2:19         ` Laurent Pinchart
2020-07-17  7:56           ` Sakari Ailus
2020-07-01 17:06   ` Niklas Söderlund
2020-07-01 18:46   ` Lad, Prabhakar
2020-07-01 21:03   ` Kieran Bingham
2020-07-01  6:21 ` [PATCH v4 2/4] media: v4l2-async: Accept endpoints and devices for fwnode matching Laurent Pinchart
2020-07-01  6:21 ` [PATCH v4 3/4] media: v4l2-async: Pass notifier pointer to match functions Laurent Pinchart
2020-07-01  6:21 ` [PATCH v4 4/4] media: v4l2-async: Log message in case of heterogeneous fwnode match Laurent Pinchart

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