dt-bindings: hwmon: Document ibm,cffps compatible string

Document this string that indicates that any version of the power supply
may be connected. In this case, the driver must detect the version
automatically.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1570648262-25383-2-git-send-email-eajames@linux.ibm.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/Documentation/devicetree/bindings/hwmon/ibm,cffps1.txt b/Documentation/devicetree/bindings/hwmon/ibm,cffps1.txt
index 1036f65..d9a2719 100644 (file)
--- a/Documentation/devicetree/bindings/hwmon/ibm,cffps1.txt
+++ b/Documentation/devicetree/bindings/hwmon/ibm,cffps1.txt
@@ -5,6 +5,9 @@ Required properties:
  - compatible                          : Must be one of the following:
                                                "ibm,cffps1"
                                                "ibm,cffps2"
+                                               or "ibm,cffps" if the system
+                                               must support any version of the
+                                               power supply
  - reg = < I2C bus address >;          : Address of the power supply on the
                                          I2C bus.