linux-kernel - [PATCH 3/9] i2c: Match using traditional OF methods, then by vendor-less compatible strings

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Date:	Fri,  6 Jun 2014 16:52:26 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	wsa@...-dreams.de, grant.likely@...aro.org,
	linus.walleij@...aro.org, linux-i2c@...r.kernel.org,
	devicetree@...r.kernel.org, Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 3/9] i2c: Match using traditional OF methods, then by vendor-less compatible strings

This function provides a single call for all I2C devices which need to
match firstly using traditional OF means i.e by of_node, then if that
fails we attempt to match using the supplied I2C client name with a
list of supplied compatible strings with the '<vendor>,' string
removed.  The latter is required due to the unruly naming conventions
used currently by I2C devices.

Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
 drivers/i2c/i2c-core.c | 13 +++++++++++++
 include/linux/i2c.h    |  9 +++++++++
 2 files changed, 22 insertions(+)

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index face8f9..80a2f2e 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -1115,6 +1115,19 @@ const struct of_device_id
 	return NULL;
 }
 EXPORT_SYMBOL_GPL(i2c_of_match_device_strip_vendor);
+
+const struct of_device_id
+*i2c_of_match_device(const struct of_device_id *matches, struct device *dev)
+{
+	const struct of_device_id *match;
+
+	match = of_match_device(matches, dev);
+	if (match)
+		return match;
+
+	return i2c_of_match_device_strip_vendor(matches, dev);
+}
+EXPORT_SYMBOL_GPL(i2c_of_match_device);
 #else
 static void of_i2c_register_devices(struct i2c_adapter *adap) { }
 #endif /* CONFIG_OF */
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index f7ec75b..ab5866f 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -565,6 +565,9 @@ extern struct i2c_client *of_find_i2c_device_by_node(struct device_node *node);
 extern struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node);
 
 extern const struct of_device_id
+*i2c_of_match_device(const struct of_device_id *matches, struct device *dev);
+
+extern const struct of_device_id
 *i2c_of_match_device_strip_vendor(const struct of_device_id *matches,
 				  struct device *dev);
 #else
@@ -580,6 +583,12 @@ static inline struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node
 }
 
 const struct of_device_id
+*i2c_of_match_device(const struct of_device_id *matches, struct device *dev)
+{
+	return NULL;
+}
+
+const struct of_device_id
 *i2c_of_match_device_strip_vendor(const struct of_device_id *matches,
 				  struct device *dev)
 {
-- 
1.8.3.2

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