[PATCH v8 03/12] dt-binding: gce: add binding for gce client reg property

[Bibby Hsieh]

cmdq driver provide a function that get the relationship
of sub system number from device node for client.
add specification for #subsys-cells, mediatek,gce-client-reg.

Signed-off-by: Bibby Hsieh <bibby.hsieh@xxxxxxxxxxxx>
---
 .../devicetree/bindings/mailbox/mtk-gce.txt    | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/mailbox/mtk-gce.txt b/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
index 1f7f8f2a3f49..d48282d6b02d 100644
--- a/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
+++ b/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
@@ -21,12 +21,21 @@ Required properties:
 	priority: Priority of GCE thread.
 	atomic_exec: GCE processing continuous packets of commands in atomic
 		way.
+- #subsys-cells: Should be 3.
+	<&phandle subsys_number start_offset size>
+	phandle: Label name of a gce node.
+	subsys_number: specify the sub-system id which is corresponding
+		       to the register address.
+	start_offset: the start offset of register address that GCE can access.
+	size: the total size of register address that GCE can access.
 
 Required properties for a client device:
 - mboxes: Client use mailbox to communicate with GCE, it should have this
   property and list of phandle, mailbox specifiers.
-- mediatek,gce-subsys: u32, specify the sub-system id which is corresponding
-  to the register address.
+Optional properties for a client device:
+- mediatek,gce-client-reg: Specify the sub-system id which is corresponding
+  to the register address, it should have this property and list of phandle,
+  sub-system specifiers.
 
 Some vaules of properties are defined in 'dt-bindings/gce/mt8173-gce.h'
 or 'dt-binding/gce/mt8183-gce.h'. Such as sub-system ids, thread priority, event ids.
@@ -40,6 +49,7 @@ Example:
 		clocks = <&infracfg CLK_INFRA_GCE>;
 		clock-names = "gce";
 		#mbox-cells = <3>;
+		#subsys-cells = <3>;
 	};
 
 Example for a client device:
@@ -48,9 +58,9 @@ Example for a client device:
 		compatible = "mediatek,mt8173-mmsys";
 		mboxes = <&gce 0 CMDQ_THR_PRIO_LOWEST 1>,
 			 <&gce 1 CMDQ_THR_PRIO_LOWEST 1>;
-		mediatek,gce-subsys = <SUBSYS_1400XXXX>;
 		mutex-event-eof = <CMDQ_EVENT_MUTEX0_STREAM_EOF
 				CMDQ_EVENT_MUTEX1_STREAM_EOF>;
-
+		mediatek,gce-client-reg = <&gce SUBSYS_1400XXXX 0x3000 0x1000>,
+					  <&gce SUBSYS_1401XXXX 0x2000 0x100>;
 		...
 	};
-- 
2.18.0