[PATCH] I2C: sysfs interface documentation

1* No more current hysteresis value. I don't think we ever saw a chip
   which monitors current, and if we ever do, I would be very, very
   surprised if it would have an hysteresis value.
2* Temperature input and max can have 4 values. [from the previous
   patch]
3* Split temperature min and hysteresis into two separate files.
4* New file temp_crit. [from previous patch]

The new file temp_crit is subject to change later as we decide more
precisely how we want to handle values that are common to more than one
temperature channels.

Documentation/i2c/sysfs-interface

@@ -68,9 +68,7 @@ curr_max[1-n]	Current max value
 		Fixed point XXXXX, divide by 1000 to get Amps.
 		Read/Write.
 
-curr_min[1-n]	Current min or hysteresis value.
-		Preferably a hysteresis value, reported as a absolute
-		current, NOT a delta from the max value.
+curr_min[1-n]	Current min value.
 		Fixed point XXXXX, divide by 1000 to get Amps.
 		Read/Write.
 
@@ -144,25 +142,38 @@ sensor[1-3]	Sensor type selection.
 		Integers 1,2,3, or thermistor Beta value (3435)
 		Read/Write.
 
-temp_max[1-3]	Temperature max value.
+temp_max[1-4]	Temperature max value.
 		Fixed point value in form XXXXX and should be divided by
 		1000 to get degrees Celsius.
 		Read/Write value.
 
-temp_min[1-3]	Temperature min or hysteresis value.
+temp_min[1-3]	Temperature min value.
 		Fixed point value in form XXXXX and should be divided by
-		1000 to get degrees Celsius.  This is preferably a
-		hysteresis value, reported as a absolute temperature,
-		NOT a delta from the max value.
+		1000 to get degrees Celsius.
 		Read/Write value.
 
-temp_input[1-3] Temperature input value.
+temp_hyst[1-3]	Temperature hysteresis value.
+		Fixed point value in form XXXXX and should be divided by
+		1000 to get degrees Celsius.  Must be reported as an
+		absolute temperature, NOT a delta from the max value.
+		Read/Write value.
+
+temp_input[1-4] Temperature input value.
+		Fixed point value in form XXXXX and should be divided by
+		1000 to get degrees Celsius.
 		Read only value.
 
+temp_crit	Temperature critical value, typically greater than all
+		temp_max values.
+		Fixed point value in form XXXXX and should be divided by
+		1000 to get degrees Celsius.
+		Common to all temperature channels.
+		Read/Write value.
+
 		If there are multiple temperature sensors, temp_*1 is
 		generally the sensor inside the chip itself, generally
-		reported as "motherboard temperature".  temp_*2 and
-		temp_*3 are generally sensors external to the chip
+		reported as "motherboard temperature".  temp_*2 to
+		temp_*4 are generally sensors external to the chip
 		itself, for example the thermal diode inside the CPU or
 		a thermistor nearby.