From: Nicola Corna <nicola@corna.info>
Date: Thu, 29 Oct 2015 11:34:26 +0000 (+0100)
Subject: i2c: add i2c_check_quirks helper function
X-Git-Tag: v4.14-rc1~4022^2~50
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cfa576db834cacc1bb01bc41b2f61a8b578e67c5;p=platform%2Fkernel%2Flinux-rpi.git

i2c: add i2c_check_quirks helper function

This patch adds a i2c_check_quirks helper function to check the quirk flags
of an i2c adapter, in a similar way to i2c_check_functionality.

Signed-off-by: Nicola Corna <nicola@corna.info>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
---

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 96970024..51028f3 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -617,6 +617,20 @@ static inline int i2c_check_functionality(struct i2c_adapter *adap, u32 func)
 	return (func & i2c_get_functionality(adap)) == func;
 }
 
+/**
+ * i2c_check_quirks() - Function for checking the quirk flags in an i2c adapter
+ * @adap: i2c adapter
+ * @quirks: quirk flags
+ *
+ * Return: true if the adapter has all the specified quirk flags, false if not
+ */
+static inline bool i2c_check_quirks(struct i2c_adapter *adap, u64 quirks)
+{
+	if (!adap->quirks)
+		return false;
+	return (adap->quirks->flags & quirks) == quirks;
+}
+
 /* Return the adapter number for a specific adapter */
 static inline int i2c_adapter_id(struct i2c_adapter *adap)
 {