linux-kernel - [PATCH V4 3/5] device property: Introduce a common API to fetch device match data

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Date:   Thu, 30 Nov 2017 21:52:54 -0500
From:   Sinan Kaya <okaya@...eaurora.org>
To:     linux-pci@...r.kernel.org, timur@...eaurora.org
Cc:     linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Sinan Kaya <okaya@...eaurora.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh@...nel.org>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH V4 3/5] device property: Introduce a common API to fetch device match data

There is an OF/ACPI function to obtain the driver data. We want to hide
OF/ACPI details from the device drivers and abstract following the device
family of functions.

Signed-off-by: Sinan Kaya <okaya@...eaurora.org>
---
 drivers/base/property.c  | 14 ++++++++++++++
 include/linux/property.h |  2 ++
 2 files changed, 16 insertions(+)

diff --git a/drivers/base/property.c b/drivers/base/property.c
index 7ed99c1..6adec89 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -15,6 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/property.h>
 #include <linux/etherdevice.h>
@@ -1335,3 +1336,16 @@ int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
 	return fwnode_call_int_op(fwnode, graph_parse_endpoint, endpoint);
 }
 EXPORT_SYMBOL(fwnode_graph_parse_endpoint);
+
+void *device_get_match_data(struct device *dev)
+{
+	void *ret;
+
+	if (IS_ENABLED(CONFIG_OF) && dev->of_node)
+		ret = (void *)of_device_get_match_data(dev);
+	else
+		ret = acpi_get_match_data(dev);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(device_get_match_data);
diff --git a/include/linux/property.h b/include/linux/property.h
index 6bebee1..01fa55b 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -275,6 +275,8 @@ int device_add_properties(struct device *dev,
 
 enum dev_dma_attr device_get_dma_attr(struct device *dev);
 
+void *device_get_match_data(struct device *dev);
+
 int device_get_phy_mode(struct device *dev);
 
 void *device_get_mac_address(struct device *dev, char *addr, int alen);
-- 
1.9.1