[PATCH] I2C: max6875 documentation update

Here is a proposed documentation update for the new max6875 i2c chip
driver.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Documentation/i2c/chips/max6875

@@ -2,10 +2,10 @@ Kernel driver max6875
 =====================
 
 Supported chips:
-  * Maxim max6874, max6875
-    Prefixes: 'max6875'
+  * Maxim MAX6874, MAX6875
+    Prefix: 'max6875'
     Addresses scanned: 0x50, 0x52
-    Datasheets:
+    Datasheet:
         http://pdfserv.maxim-ic.com/en/ds/MAX6874-MAX6875.pdf
 
 Author: Ben Gardner <bgardner@wabtec.com>
@@ -23,14 +23,26 @@ Module Parameters
 Description
 -----------
 
-The MAXIM max6875 is a EEPROM-programmable power-supply sequencer/supervisor.
+The Maxim MAX6875 is an EEPROM-programmable power-supply sequencer/supervisor.
 It provides timed outputs that can be used as a watchdog, if properly wired.
 It also provides 512 bytes of user EEPROM.
 
-At reset, the max6875 reads the configuration eeprom into its configuration
+At reset, the MAX6875 reads the configuration EEPROM into its configuration
 registers.  The chip then begins to operate according to the values in the
 registers.
 
+The Maxim MAX6874 is a similar, mostly compatible device, with more intputs
+and outputs:
+
+             vin     gpi    vout
+MAX6874        6       4       8
+MAX6875        4       3       5
+
+MAX6874 chips can have four different addresses (as opposed to only two for
+the MAX6875). The additional addresses (0x54 and 0x56) are not probed by
+this driver by default, but the probe module parameter can be used if
+needed.
+
 See the datasheet for details on how to program the EEPROM.