path: root/Documentation
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authorStefan Agner <stefan@agner.ch>2014-11-02 21:36:44 +0100
committerShawn Guo <shawn.guo@linaro.org>2014-11-23 15:08:09 +0800
commit3f3ebfb84aad46e3b49a41fe2ed9037835b2860e (patch)
treec05f26f73bbf66a2b9105abcd89269243400290a /Documentation
parent7e41a98dcc1b220c2c705f839ba76787c08858d3 (diff)
ARM: dts: vf610: assign oscillator to clock module
The clock controller module (CCM) has several clock inputs, which are connected to external crystal oscillators. To reflect this, assign these fixed clocks to the CCM node directly. This especially resolves initialization order dependencies we had with the earlier initialization code: When resolving of the fixed clocks failed in clk-vf610, the code created fixed clocks with a rate of 0. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Diffstat (limited to 'Documentation')
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/clock/vf610-clock.txt b/Documentation/devicetree/bindings/clock/vf610-clock.txt
index c80863d344ac..63f9f1ac3439 100644
--- a/Documentation/devicetree/bindings/clock/vf610-clock.txt
+++ b/Documentation/devicetree/bindings/clock/vf610-clock.txt
@@ -5,6 +5,19 @@ Required properties:
- reg: Address and length of the register set
- #clock-cells: Should be <1>
+Optional properties:
+- clocks: list of clock identifiers which are external input clocks to the
+ given clock controller. Please refer the next section to find
+ the input clocks for a given controller.
+- clock-names: list of names of clocks which are exteral input clocks to the
+ given clock controller.
+Input clocks for top clock controller:
+ - sxosc (external crystal oscillator 32KHz, recommended)
+ - fxosc (external crystal oscillator 24MHz, recommended)
+ - audio_ext
+ - enet_ext
The clock consumer should specify the desired clock by having the clock
ID in its "clocks" phandle cell. See include/dt-bindings/clock/vf610-clock.h
for the full list of VF610 clock IDs.
@@ -15,6 +28,8 @@ clks: ccm@4006b000 {
compatible = "fsl,vf610-ccm";
reg = <0x4006b000 0x1000>;
#clock-cells = <1>;
+ clocks = <&sxosc>, <&fxosc>;
+ clock-names = "sxosc", "fxosc";
uart1: serial@40028000 {

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