[PATCH v2 01/10] dt-bindings: clock: Add syscon support to Actions Semi Owl SoCs
From: Manivannan Sadhasivam <hidden>
Date: 2018-08-01 03:40:03
Also in:
linux-clk, linux-devicetree, lkml
Subsystem:
common clk framework, open firmware and flattened device tree bindings, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Since the clock and reset management units are sharing the same memory map, document the clock bindings to support System Controller. Signed-off-by: Manivannan Sadhasivam <redacted> --- .../bindings/clock/actions,owl-cmu.txt | 21 +++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-)
diff --git a/Documentation/devicetree/bindings/clock/actions,owl-cmu.txt b/Documentation/devicetree/bindings/clock/actions,owl-cmu.txt
index d1e60d297387..649c95fc4582 100644
--- a/Documentation/devicetree/bindings/clock/actions,owl-cmu.txt
+++ b/Documentation/devicetree/bindings/clock/actions,owl-cmu.txt@@ -9,8 +9,6 @@ Required Properties: - compatible: should be one of the following, "actions,s900-cmu" "actions,s700-cmu" -- reg: physical base address of the controller and length of memory mapped - region. - clocks: Reference to the parent clocks ("hosc", "losc") - #clock-cells: should be 1.
@@ -21,6 +19,13 @@ All available clocks are defined as preprocessor macros in corresponding dt-bindings/clock/actions,s900-cmu.h or actions,s700-cmu.h header and can be used in device tree sources. +The CMU registers are part of the system-controller block on Owl SoCs. + +Parent node should have the following properties : +- compatible: "syscon", "simple-mfd" +- reg: physical base address of the controller and length of memory mapped + region. + External clocks: The hosc clock used as input for the plls is generated outside the SoC. It is
@@ -31,11 +36,15 @@ Actions Semi S900 CMU also requires one more clock: Example: Clock Management Unit node: - cmu: clock-controller at e0160000 { - compatible = "actions,s900-cmu"; + sysctrl: system-controller at e0160000 { + compatible = "syscon", "simple-mfd"; reg = <0x0 0xe0160000 0x0 0x1000>; - clocks = <&hosc>, <&losc>; - #clock-cells = <1>; + + cmu: clock-controller { + compatible = "actions,s900-cmu"; + clocks = <&hosc>, <&losc>; + #clock-cells = <1>; + }; }; Example: UART controller node that consumes clock generated by the clock
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2.17.1