[PATCH v2 1/2] clk: add device tree binding for Artpec-6 clock controller
From: Lars Persson <lars.persson@axis.com>
Date: 2016-02-19 14:30:35
Also in:
linux-clk, 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
Add device tree documentation for the main clock controller in the Artpec-6 SoC. Signed-off-by: Lars Persson <redacted> --- .../devicetree/bindings/clock/artpec6.txt | 41 ++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/artpec6.txt
diff --git a/Documentation/devicetree/bindings/clock/artpec6.txt b/Documentation/devicetree/bindings/clock/artpec6.txt
new file mode 100644
index 0000000..76e3e7f
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/artpec6.txt@@ -0,0 +1,41 @@ +* Clock bindings for Axis ARTPEC-6 chip + +The bindings are based on the clock provider binding in +Documentation/devicetree/bindings/clock/clock-bindings.txt + +External clocks: +---------------- + +There are two external inputs to the main clock controller which should be +provided using the common clock bindings. +- "sys_refclk": External 50 Mhz oscillator (required) +- "i2s_refclk": Alternate audio reference clock (optional). + +Main clock controller +--------------------- + +Required properties: +- #clock-cells: Should be <1> + See dt-bindings/clock/axis,artpec6-clkctrl.h for the list of valid identifiers. +- compatible: Should be "axis,artpec6-clkctrl" +- reg: Must contain the base address and length of the system controller +- clocks: Must contain a phandle entry for each clock in clock-names +- clock-names: Must include the external oscillator ("sys_refclk"). Optional + ones are the audio reference clock ("i2s_refclk") and the audio fractional + divider ("frac_clk"). + +Examples: + +ext_clk: ext_clk { + #clock-cells = <0>; + compatible = "fixed-clock"; + clock-frequency = <50000000>; +}; + +clkctrl: clkctrl { + #clock-cells = <1>; + compatible = "axis,artpec6-clkctrl"; + reg = <0xf8000000 0x48>; + clocks = <&ext_clk>; + clock-names = "sys_refclk"; +};
--
2.1.4