Initialization order

[Renaud Barbier]

What about an init call back like in the pair: arch/arm/boards/tqma93xx/board.c  and drivers/mfd/pca9450.c 

> -----Original Message-----
> From: Ahmad Fatoum <a.fatoum at pengutronix.de>
> Sent: 24 June 2026 21:19
> To: Renaud Barbier <Renaud.Barbier at ametek.com>; Barebox List
> <barebox at lists.infradead.org>
> Subject: Re: Initialization order
> 
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> 
> Hello Renaud,
> 
> On 6/24/26 17:51, Renaud Barbier wrote:
> > Hello,
> > I have a LS1021A connected to a device via SPI bus and PCIe bus. To enable
> the PCIe bus on this device , I need to write registers via the SPI bus.
> > I created a small SPI driver using the regmap layer to access the chip and I
> am able to  display or write registers via md and mw.
> >
> > I have tried (core)device_initcall opening the device using
> > open_and_lseek but it is either called after ls_pcie_probe or too
> > early and failed
> >
> > What would be the best approach to do this initialization before
> ls_pcie_probe is called?
> 
> The easy way would be doing it in the board driver by enabling deep probe
> and calling
> of_device_ensure_probed() on the SPI device to ensure it's available.
> 
> The more proper way would be to reflect the dependency in the device tree.
> Sascha did some work with creating DT nodes for PCI devices recently, so
> maybe he has some advice to share.
> 
> Cheers,
> Ahmad
> 
> >
> >
> > Cheers,
> > Renaud
> >
> >
> >
> 
> 
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