Hello Pali, On 20.04.23 21:44, 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> > --- > drivers/pci/pci_mpc85xx.c | 12 ++++++++++++ > 1 file changed, 12 insertions(+)
Reviewed-by: Heiko Schocher <h...@denx.de> Tested-by: Heiko Schocher <h...@denx.de> Tested on the socrates board, it fixes the problem: PCI: Failed autoconfig bar 18 PCI: Failed autoconfig bar 20 Thanks! bye, Heiko -- DENX Software Engineering GmbH, Managing Director: Erika Unter HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-52 Fax: +49-8142-66989-80 Email: h...@denx.de