linux-kernel - [RFC PATCH 1/5] driver core: Add fwnode member to struct device

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Message-Id: <20181024150525.11552-2-heikki.krogerus@linux.intel.com>
Date:   Wed, 24 Oct 2018 18:05:21 +0300
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Hans de Goede <hdegoede@...hat.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 1/5] driver core: Add fwnode member to struct device_connection

This will prepare the device connection API for connections
described in firmware.

Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
---
 include/linux/device.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/device.h b/include/linux/device.h
index 90224e75ade4..a964a0d614fa 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -753,11 +753,17 @@ struct device_dma_parameters {
 
 /**
  * struct device_connection - Device Connection Descriptor
+ * @fwnode: The device node of the connected device
  * @endpoint: The names of the two devices connected together
  * @id: Unique identifier for the connection
  * @list: List head, private, for internal use only
+ *
+ * NOTE: @fwnode is not used together with @endpoint. @fwnode is used when
+ * platform firmware defines the connection. When the connection is registeded
+ * with device_connection_add() @endpoint is used instead.
  */
 struct device_connection {
+	struct fwnode_handle	*fwnode;
 	const char		*endpoint[2];
 	const char		*id;
 	struct list_head	list;
-- 
2.19.1