On 10/05/2013 07:46 PM, Fabio Estevam wrote:
> Hi Marc,
>
> On Thu, Oct 3, 2013 at 3:51 PM, Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> wrote:
>
>> For example:
>>
>> The imx28.dtsi gives this compatible string for its CAN core:
>>
>>> compatible = "fsl,imx28-flexcan", "fsl,p1010-flexcan";
>>
>> The flexcan driver defines:
>>
>>> static const struct of_device_id flexcan_of_match[] = {
>>> { .compatible = "fsl,p1010-flexcan", .data = &fsl_p1010_devtype_data, },
>>> { .compatible = "fsl,imx28-flexcan", .data = &fsl_imx28_devtype_data, },
>>> { .compatible = "fsl,imx6q-flexcan", .data = &fsl_imx6q_devtype_data, },
>>> { /* sentinel */ },
>>> };
>>
>> The "p1010" was the first Freescale SoC with the flexcan core. But this SoC has
>> a bug, so a workaround has to be enabled in the driver. The mx28 has this bug
>> fixed, so we don't need this quite costly workaround.
>
> What about defining in imx28.dtsi:
> compatible = "fsl,imx28-flexcan".
It already works with changing only the driver.
> and the in the flexcan driver we could do the same as in the fec_main driver:
>
> static struct platform_device_id fec_devtype[] = {
For DT based probing I need to modify the struct of_device_id, but I got
the idea :)
> {
> /* keep it for coldfire */
> .name = DRIVER_NAME,
> .driver_data = 0,
> }, {
> .name = "imx25-fec",
> .driver_data = FEC_QUIRK_USE_GASKET,
> }, {
> .name = "imx27-fec",
> .driver_data = 0,
> }, {
> .name = "imx28-fec",
> .driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME,
> }, {
> .name = "imx6q-fec",
> .driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
> FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
> FEC_QUIRK_HAS_VLAN | FEC_QUIRK_ERR006358,
> }, {
> .name = "mvf600-fec",
> .driver_data = FEC_QUIRK_ENET_MAC,
> }, {
> /* sentinel */
> }
> };
>
> So that we know which SoC needs to have the workaround applied or not.
I've already created a patch that rearranges the struct of_device_id in
the driver, works for me. I posted it (with another fix) for review on
linux-can[1].
Thanks,
Marc
[1] http://comments.gmane.org/gmane.linux.can/4050
--
Pengutronix e.K. | Marc Kleine-Budde |
Industrial Linux Solutions | Phone: +49-231-2826-924 |
Vertretung West/Dortmund | Fax: +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
Attachment:
signature.asc
Description: OpenPGP digital signature
