On Thu, Aug 04, 2011 at 10:59:32PM +0200, Wolfgang Grandegger wrote:
> On 08/04/2011 10:45 PM, Robin Holt wrote:
> > On Thu, Aug 04, 2011 at 10:21:50PM +0200, Marc Kleine-Budde wrote:
> >> On 08/04/2011 09:15 PM, Robin Holt wrote:
> >>> The freescale P1010RDB board does not have a
> >>> clk_{get,put,get_rate,enable,disable} set of functions. Wrap these with a
> >>> flexcan_ #define for arm, and implement a more complete function for ppc.
> >>
> >> Powerpc has these functions, too....wonder if they do the expected :)
> >
> > On the p1010, I think the clock source for the CAN interface can be
> > different from the system clock. In the 'p1010rdb.dts' file which
> > describes the can interface, there is a separate entry for the
> > clock-source and clock-divider:
> >
> > can0@1c000 {
> > compatible = "fsl,flexcan-v1.0";
> > reg = <0x1c000 0x1000>;
> > interrupts = <48 0x2>;
> > interrupt-parent = <&mpic>;
> > fsl,flexcan-clock-source = <1>;
> > fsl,flexcan-clock-divider = <2>;
> > };
>
> Clock source should be a string like for the MSCAN. The bindings are
> documented in:
>
> http://lxr.linux.no/#linux+v3.0/Documentation/devicetree/bindings/net/can/
>
> Also we should adapt "fsl-flexcan.txt", which sneaked into the mainline
> kernel somehow.
I will have to look at this more tomorrow when I have a clear head.
Thanks,
Robin
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