Linux Kernels

dt-bindings: clock: add description of LPC32xx clock controller

This change “dt-bindings: clock: add description of LPC32xx clock controller” (commit 92e16f0) in Linux kernel is authored by Vladimir Zapolskiy <vz [at] mleia.com> on Sun Dec 6 12:45:53 2015 +0200.

Description of "dt-bindings: clock: add description of LPC32xx clock controller"

The change “dt-bindings: clock: add description of LPC32xx clock controller” introduces changes as follows.

dt-bindings: clock: add description of LPC32xx clock controller

NXP LPC32xx SoC has a clocking and power control unit (CPC) as a part
of system control block (SCB). CPC is supplied by two external
oscillators and it manages core and most of peripheral
clocks, the change adds description of DT bindings for clock
controller found on LPC32xx SoC series.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>

Linux kernel releases containing commit 92e16f0

The Linux kernel releases containing this commit are as follows.

Linux kernel code changes from "dt-bindings: clock: add description of LPC32xx clock controller"

There are 30 lines of Linux source code added/deleted in this change. Code changes to Linux kernel are as follows.

 .../bindings/clock/nxp,lpc3220-clk.txt        | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/nxp,lpc3220-clk.txt
 
diff --git a/Documentation/devicetree/bindings/clock/nxp,lpc3220-clk.txt b/Documentation/devicetree/bindings/clock/nxp,lpc3220-clk.txt
new file mode 100644
index 000000000000..20cbca3f41d8
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/nxp,lpc3220-clk.txt
@@ -0,0 +1,30 @@
+NXP LPC32xx Clock Controller
+
+Required properties:
+- compatible: should be "nxp,lpc3220-clk"
+- reg:  should contain clock controller registers location and length
+- #clock-cells: must be 1, the cell holds id of a clock provided by the
+  clock controller
+- clocks: phandles of external oscillators, the list must contain one
+  32768 Hz oscillator and may have one optional high frequency oscillator
+- clock-names: list of external oscillator clock names, must contain
+  "xtal_32k" and may have optional "xtal"
+
+Examples:
+
+	/* System Control Block */
+	scb {
+		compatible = "simple-bus";
+		ranges = <0x0 0x040004000 0x00001000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		clk: clock-controller@0 {
+			compatible = "nxp,lpc3220-clk";
+			reg = <0x00 0x114>;
+			#clock-cells = <1>;
+
+			clocks = <&xtal_32k>, <&xtal>;
+			clock-names = "xtal_32k", "xtal";
+		};
+	};

The commit for this change in Linux stable tree is 92e16f0 (patch).

Last modified: 2020/01/11 10:02