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net: flexcan: clock-frequency is optional for device tree probe 

The property clock-frequency is optional for device tree probe.  When
it's absent, the flexcan driver will try to get the frequency from clk
system by calling clk_get_rate.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Shawn Guo 2012-06-26 16:49:22 +08:00 committed by Marc Kleine-Budde
parent ec00f044ef
commit 8b7b736fbf
1 changed files with 3 additions and 0 deletions
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Documentation/devicetree/bindings/net/can/fsl-flexcan.txt
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@ -11,6 +11,9 @@ Required properties:
- reg : Offset and length of the register set for this device - reg : Offset and length of the register set for this device
- interrupts : Interrupt tuple for this device - interrupts : Interrupt tuple for this device
Optional properties:
- clock-frequency : The oscillator frequency driving the flexcan device - clock-frequency : The oscillator frequency driving the flexcan device
Example: Example: