On Thu, Apr 20, 2023 at 09:44:23PM +0200, Pali Rohár wrote: > At BDF address 00:00.0 is fictional device which PCI configuration header > is for configuring mpc85xx PCI controller itself. PCI config space of this > device has ATMU inbound registers on position of PCI BARs. Trying to do PCI > auto configuration of this device cause rewriting ATMU inbound registers. > To avoid it, do not allow overwriting registers at BARs positions. And > because this device does not have any PCI memory, return zeros when trying > to read PCI BARs config space registers. It signals to auto configuration > tool to not allocate any PCI memory for this device. > > This information is taken from MPC8544E Reference Manual, sections > 17.3.1.3, 17.3.1.1.1, 17.3.2 and 17.3.2.11. Available at NXP website: > https://www.nxp.com/docs/en/reference-manual/MPC8544ERM.pdf > > Signed-off-by: Pali Rohár <p...@kernel.org> > Reviewed-by: Heiko Schocher <h...@denx.de> > Tested-by: Heiko Schocher <h...@denx.de>
Applied to u-boot/master, thanks! -- Tom
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