i2c-algo-pcf: Multi-master lost-arbitration improvement
Improve lost-arbitration handling of PCF8584. This is necessary for
support of a currently out-of-kernel driver for Sun Microsystems E250
environmental management; perhaps others.
Signed-off-by: Eric Brower <ebrower@gmail.com>
Acked-by: Dan Smolik <marvin@mydatex.cz>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/include/linux/i2c-algo-pcf.h b/include/linux/i2c-algo-pcf.h
index 77afbb6..74fb6f8 100644
--- a/include/linux/i2c-algo-pcf.h
+++ b/include/linux/i2c-algo-pcf.h
@@ -36,6 +36,12 @@
/* local settings */
int udelay;
int timeout;
+
+ /* Multi-master lost arbitration back-off delay (msecs)
+ * This should be set by the bus adapter or knowledgable client
+ * if bus is multi-mastered, else zero
+ */
+ unsigned long lab_mdelay;
};
int i2c_pcf_add_bus(struct i2c_adapter *);