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Subject[PATCH 1/2] Documentation: can: flexcan: add PE clock source property to device tree
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From: Dong Aisheng <aisheng.dong@nxp.com>

The FlexCAN controller can parse clock source property from DTS file to
select PE clock source.

Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
---
Documentation/devicetree/bindings/net/can/fsl-flexcan.txt | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/can/fsl-flexcan.txt b/Documentation/devicetree/bindings/net/can/fsl-flexcan.txt
index bc77477c6878..a04168605998 100644
--- a/Documentation/devicetree/bindings/net/can/fsl-flexcan.txt
+++ b/Documentation/devicetree/bindings/net/can/fsl-flexcan.txt
@@ -32,6 +32,13 @@ Optional properties:
ack_gpr is the gpr register offset of CAN stop acknowledge.
ack_bit is the bit offset of CAN stop acknowledge.

+- fsl,clk-source: Select the clock source to the CAN Protocol Engine (PE).
+ It's SoC Implementation dependent. Refer to RM for detailed
+ definition. If this property is not set in device tree node
+ then driver selects clock source 1 by default.
+ 0: clock source 0 (oscillator clock)
+ 1: clock source 1 (peripheral clock)
+
Example:

can@1c000 {
@@ -40,4 +47,5 @@ Example:
interrupts = <48 0x2>;
interrupt-parent = <&mpic>;
clock-frequency = <200000000>; // filled in by bootloader
+ fsl,clk-source = <0>; // select clock source 0 for PE
};
--
2.17.1
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