doc: dt: arm,pl172: add description of PL175 and PL176 controllers

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org
Signed-off-by: Joachim Eastwood <manabian@gmail.com>

diff --git a/Documentation/devicetree/bindings/memory-controllers/arm,pl172.txt b/Documentation/devicetree/bindings/memory-controllers/arm,pl172.txt
index e6df32f9986df16fd2d25939827fc0213b7aebd1..22b77ee02f58340eca67c7566553a391e11d8461 100644 (file)
--- a/Documentation/devicetree/bindings/memory-controllers/arm,pl172.txt
+++ b/Documentation/devicetree/bindings/memory-controllers/arm,pl172.txt
@@ -1,8 +1,9 @@
-* Device tree bindings for ARM PL172 MultiPort Memory Controller
+* Device tree bindings for ARM PL172/PL175/PL176 MultiPort Memory Controller
 
 Required properties:
 
-- compatible:          "arm,pl172", "arm,primecell"
+- compatible:          Must be "arm,primecell" and exactly one from
+                       "arm,pl172", "arm,pl175" or "arm,pl176".
 
 - reg:                 Must contains offset/length value for controller.
 
@@ -56,7 +57,8 @@ Optional child cs node config properties:
 
 - mpmc,extended-wait:  Enable extended wait.
 
-- mpmc,buffer-enable:  Enable write buffer.
+- mpmc,buffer-enable:  Enable write buffer, option is not supported by
+                       PL175 and PL176 controllers.
 
 - mpmc,write-protect:  Enable write protect.