From: Matthias Brugger <mbrugger@xxxxxxxx>
On SoCs with no publical available HW or no working graphic stack
we change the devicetree binding for the mmsys clock part. This
way we don't need to register a platform device explicitly in the
drm driver. Instead we can create a mmsys child which invokes the
clock driver.
Signed-off-by: Matthias Brugger <mbrugger@xxxxxxxx>
---
.../bindings/arm/mediatek/mediatek,mmsys.txt | 21 ++++++++++++-------
.../display/mediatek/mediatek,disp.txt | 4 ++++
2 files changed, 18 insertions(+), 7 deletions(-)
diff --git a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.txt b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.txt
index 4468345f8b1a..d4e205981363 100644
--- a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.txt
+++ b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.txt
@@ -1,4 +1,4 @@
-Mediatek mmsys controller
+Mediatek mmsys clock controller
============================
The Mediatek mmsys controller provides various clocks to the system.
@@ -6,18 +6,25 @@ The Mediatek mmsys controller provides various clocks to the system.
Required Properties:
- compatible: Should be one of:
- - "mediatek,mt2712-mmsys", "syscon"
- - "mediatek,mt6797-mmsys", "syscon"
+ - "mediatek,mt2712-mmsys-clk", "syscon"
+ - "mediatek,mt6797-mmsys-clk", "syscon"
- #clock-cells: Must be 1
-The mmsys controller uses the common clk binding from
+The mmsys clock controller uses the common clk binding from
Documentation/devicetree/bindings/clock/clock-bindings.txt
The available clocks are defined in dt-bindings/clock/mt*-clk.h.
+It is a child of the mmsys block, see binding at:
+Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
Example:
-mmsys: clock-controller@14000000 {
- compatible = "mediatek,mt8173-mmsys", "syscon";
+mmsys: syscon@14000000 {
+ compatible = "mediatek,mt2712-mmsys", "syscon", "simple-mfd";
reg = <0 0x14000000 0 0x1000>;
- #clock-cells = <1>;
+
+ mmsys_clk: clock-controller@14000000 {
+ compatible = "mediatek,mt2712-mmsys-clk";
+ #clock-cells = <1>;
+ };
+
};
diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
index 4b008d992398..38c708cb7e55 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
@@ -54,6 +54,10 @@ Required properties (all function blocks):
DPI controller nodes have multiple clock inputs. These are documented in
mediatek,dsi.txt and mediatek,dpi.txt, respectively.
+Some chips have a separate binding for the clock controller, which is a child node
+of the mmsys device, for more information see:
+Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.txt
+
Required properties (DMA function blocks):
- compatible: Should be one of
"mediatek,<chip>-disp-ovl"
--
2.19.1
