On 08/10/2011 01:30 PM, Robin Holt wrote: > On Wed, Aug 10, 2011 at 12:36:22PM -0500, Scott Wood wrote: >> On 08/10/2011 12:19 PM, Robin Holt wrote: >>> On Wed, Aug 10, 2011 at 11:56:28AM -0500, Scott Wood wrote: >>>> Also may want to list fsl,p1010-rdb as a "canonical compatible" for >>>> anything which is backwards compatible with p1010's implementation. >>> >>> How do I specify 'canonical compatible'? >> >> Something like: >> >> compatible: Should be "fsl,<processor>-flexcan" and "fsl,flexcan". >> >> An implementation should also claim any of the following compatibles >> that it is fully backwards compatible with: >> >> - fsl,p1010-rdb
Gah, I don't know how "rdb" replaced "flexcan" in the above. Sorry for any confusion. > I am so confused. fsl,p1010-flexcan refers, in my mind at least, to > a particular chiplet on the p1010 freescale processor. It refers to a particular version of the flexcan logic, for which the hardware doc people weren't kind enough to give us a public version number. It has been common and recommended practice in such cases, when there are multiple chips containing the same device, to pick a canonical chip (such as the first one to have the device or to be supported) and have others claim compatibility with it. > fsl,p1010-rdb > would mean nothing to me as that is a p1010 processor with two flexcan > chiplets wired to a pair of DB-9 jacks. For the driver, what additional > information is being conveyed? The programming model of the flexcan chiplet. > Let's cut to the chase. Here is what I have after incorporating your > earlier comment about the compatible line. Please mark this up to > exactly what you are asking for. > > Thanks, > Robin > ------------------------------------------------------------------------ > Flexcan CAN contoller on Freescale's ARM and PowerPC processors > > Required properties: > > - compatible : Should be "fsl,<processor>-flexcan" and "fsl,flexcan" An implementation should also claim any of the following compatibles that it is fully backwards compatible with: - fsl,p1010-flexcan > - reg : Offset and length of the register set for this device > - interrupts : Interrupt tuple for this device > > Example: > > can@1c000 { > compatible = "fsl,p1010-flexcan", "fsl,flexcan"; > reg = <0x1c000 0x1000>; > interrupts = <48 0x2>; > interrupt-parent = <&mpic>; > }; > -Scott _______________________________________________ Socketcan-core mailing list Socketcan-core@lists.berlios.de https://lists.berlios.de/mailman/listinfo/socketcan-core