On 06/27/2012 10:19 AM, Hui Wang wrote:
> At least in the i.MX series, the flexcan contrller divides into ver_3
> and ver_10, current driver is for ver_3 controller.
> 
> i.MX6 has ver_10 controller, it has more reigsters than ver_3 has.
> The rxfgmask (Rx FIFO Global Mask) register is one of the new added.
> Its reset value is 0xffffffff, this means ID Filter Table must be
> checked when receive a packet, but the driver is designed to accept
> everything during the chip start, we need to clear this register to
> follow this design.
> 
> Add a hw_ver entry in the device tree, this can let us distinguish
> which version the controller is, if we don't set value to this entry,
> the hw_ver is 3 by default, this is backward compatible for existing
> platforms like powerpc and imx35.

Is it possible to read this value from the hardware?
Another possibility would be to introduce a new compatible device in the
device tree.

Marc

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