Re: [PATCH] can: flexcan: add hardware controller version support

[Marc Kleine-Budde <mkl@pengutronix.de>]

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Hello,

On 07/01/2012 10:21 PM, Marc Kleine-Budde wrote:
> From: Hui Wang <jason77.wang@gmail.com>
> 
> At least in the i.MX series, the flexcan contrller divides into ver_3
> and ver_10, current driver is for ver_3 controller.

Has someone access to the freescale hardware people and can figure out
the controller versions used on:

imx28
imx25
imx35
imx53

Because I noticed that the FLEXCAN_CTRL_CLK_SRC bit (bit 13 of the
FLEXCAN control register) is marked as reserved in the mx53 datasheet
(although its meaning is documented) as well as in the imx6q. Is there a
Changelog of this core available?

> 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.
> 
> Use the data entry of the struct of_device_id to point chip specific
> info, we can set hardware version for each platform.

cheers, Marc

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