linux-kernel - [PATCH v5 08/12] dt-bindings: mediatek: Change the binding for mmsys clocks

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Date:   Fri, 16 Nov 2018 13:54:45 +0100
From:   matthias.bgg@...nel.org
To:     robh+dt@...nel.org, mark.rutland@....com, ck.hu@...iatek.com,
        p.zabel@...gutronix.de, airlied@...ux.ie, mturquette@...libre.com,
        sboyd@...eaurora.org, ulrich.hecht+renesas@...il.com,
        laurent.pinchart@...asonboard.com, matthias.bgg@...il.com
Cc:     sean.wang@...iatek.com, sean.wang@...nel.org,
        rdunlap@...radead.org, wens@...e.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, Matthias Brugger <mbrugger@...e.com>
Subject: [PATCH v5 08/12] dt-bindings: mediatek: Change the binding for mmsys clocks

From: Matthias Brugger <mbrugger@...e.com>

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@...e.com>
---
 .../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@...00000 {
-	compatible = "mediatek,mt8173-mmsys", "syscon";
+mmsys: syscon@...00000 {
+	compatible = "mediatek,mt2712-mmsys", "syscon", "simple-mfd";
 	reg = <0 0x14000000 0 0x1000>;
-	#clock-cells = <1>;
+
+	mmsys_clk: clock-controller@...00000 {
+		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