On 22:39 Tue 21 May , Jean-Christophe PLAGNIOL-VILLARD wrote:
> Hi,
>
> I'm currently adding the ks8851-ml support to a at91 board
>
> On this board we use a gpio as interrupt but I found an issue
>
> when populating the platfomr devices we try found the virq for the
> ks8851 but the irq domain is not yet present as the gpio driver (a
> platform device is not probed) so we get this
>
> irq: no irq domain found for /ahb/apb/pinctrl@fffff400/gpio@fffffa00 !
>
> if we use a gpio irq for a i2c or spi devices it will work as the spi
> bus will be populate after the gpio driver will be probed
>
> Do you have any idea how can we delay the population of the
> ks8851 device? via -EPROBE_DEFER?
I continue to debug and found that to make it work we need to have a specific
driver init
we need before calling
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
to create all the irq domain
so we need to probe the gpio driver before, but as the gpio driver (on at91
the same driver do pintrl + gpio) is a platform_device, we need to call
of_platform_device_create_pdata(np, NULL, NULL, NULL);
on the gpio nodes and pinctrl
but as of_platform_populate & co does not check if a node is already handled
we need modify it to track it
Grant do you want to do this way or do you have something else in mind
Best Regards,
J.
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