[PATCH v6 03/12] dt-binding: gce: add binding for gce subsys property

From: Bibby Hsieh
Date: Thu May 16 2019 - 05:04:55 EST


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

Signed-off-by: Bibby Hsieh <bibby.hsieh@xxxxxxxxxxxx>
---
.../devicetree/bindings/mailbox/mtk-gce.txt | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/mailbox/mtk-gce.txt b/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
index 1f7f8f2a3f49..dceab63ccd06 100644
--- a/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
+++ b/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
@@ -21,11 +21,19 @@ 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
+Optional properties for a client device:
+- mediatek,gce-client-reg: u32, specify the sub-system id which is corresponding
to the register address.

Some vaules of properties are defined in 'dt-bindings/gce/mt8173-gce.h'
@@ -40,6 +48,7 @@ Example:
clocks = <&infracfg CLK_INFRA_GCE>;
clock-names = "gce";
#mbox-cells = <3>;
+ #subsys-cells = <3>;
};

Example for a client device:
@@ -48,9 +57,9 @@ 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