On 08/11/2011 06:07 PM, Robin Holt wrote:
> If our CAN device's device tree node has a clock-frequency property,
> then use that value for the can devices clock frequency. If not, fall
> back to asking the platform/mach code for the clock frequency associated
> with the flexcan device.
>
> Signed-off-by: Robin Holt <h...@sgi.com>
> To: Kumar Gala <ga...@kernel.crashing.org>
> To: Wolfgang Grandegger <w...@grandegger.com>,
> To: Marc Kleine-Budde <m...@pengutronix.de>,
> To: U Bhaskar-B22300 <b22...@freescale.com>
> To: Scott Wood <scottw...@freescale.com>
> To: Grant Likely <grant.lik...@secretlab.ca>
> Cc: socketcan-c...@lists.berlios.de,
> Cc: net...@vger.kernel.org,
> Cc: PPC list <linuxppc-dev@lists.ozlabs.org>
> Cc: devicetree-disc...@lists.ozlabs.org
> ---
> .../devicetree/bindings/net/can/fsl-flexcan.txt | 2 +
> drivers/net/can/flexcan.c | 33
> +++++++++++++++-----
> 2 files changed, 27 insertions(+), 8 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/net/can/fsl-flexcan.txt
> b/Documentation/devicetree/bindings/net/can/fsl-flexcan.txt
> index c78dcbb..a4382c7 100644
> --- a/Documentation/devicetree/bindings/net/can/fsl-flexcan.txt
> +++ b/Documentation/devicetree/bindings/net/can/fsl-flexcan.txt
> @@ -11,6 +11,7 @@ Required properties:
>
> - reg : Offset and length of the register set for this device
> - interrupts : Interrupt tuple for this device
> +- clock-frequency : The oscillator frequency driving the flexcan device
>
> Example:
>
> @@ -19,4 +20,5 @@ Example:
> reg = <0x1c000 0x1000>;
> interrupts = <48 0x2>;
> interrupt-parent = <&mpic>;
> + clock-frequency = <0x0bebc1fc>;
clock-frequency = <200000000>; // filled in by bootloader
Is better readable. You should also add the comment.
Wolfgang.
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