Re: missing timer in dts: how to deal ?

[Jared McNeill <jmcneill%invisible.ca@localhost>]

sys/stand/efiboot/efifdt.c has some examples. An easy one is in 
efi_fdt_gop (starting on L371) which creates a /chosen/framebuffer node:

1) Get a handle to the parent node:

   chosen = efi_fdt_chosen();

2) Add a child node, storing the handle:

   fb = fdt_add_subnode(fdt_data, chosen, "framebuffer@fe000000");

3) Set properties on the node using fdt_appendprop_*

Happy to help review any changes you want to make here, feel free to reach 
out to me off list.

Take care,
Jared


On Sat, 6 May 2023, Manuel Bouyer wrote:

> On Fri, May 05, 2023 at 06:55:35PM -0300, Jared McNeill wrote:
> > Hi Manuel --
> >
> > The fp_bootstrap callback for i.mx6sx should be able to deal with this.
> > Either make a fake device_t + softc and call the attach function directly
> > (no need for this to be an actual device), or create a node programatically
> > describing the device and add it to the fdt using libfdt.h.
> >
> > Try to make the code smart enough to only do this if a device with that
> > compatible string does not already exist in the device tree, in case it is
> > added in the future.
>
> thanks
> I think the fdt node is the way to go, as this also needs an interrupt and
> it may not be so easy to do without a node.
>
> Do you have an example of a node created in the kernel using libfdt.h ?
> I had a quick look at libfdt.h and it doesn't look obvious ...
>
> --
> Manuel Bouyer <bouyer%antioche.eu.org@localhost>
>     NetBSD: 26 ans d'experience feront toujours la difference
> --