The current driver assumes the downstream devices can provide clkreq# for ASPM. These commits accomodate devices w/ or w/o clkreq# and also handle L1SS-capable devices. The Raspian Linux folks have already been using a PCIe RC property "brcm,enable-l1ss". These commits use the same property, in a backward-compatible manner, and the implementaion adds more detail and also automatically identifies devices w/o a clkreq# signal, i.e. most devices plugged into an RPi CM4 IO board. Jim Quinlan (3): dt-bindings: PCI: brcmstb: Add two optional props PCI: brcmstb: Clkreq# accomodations of downstream device PCI: brcmstb: Allow setting the completion timeout .../bindings/pci/brcm,stb-pcie.yaml | 12 +++ drivers/pci/controller/pcie-brcmstb.c | 93 +++++++++++++++++-- 2 files changed, 95 insertions(+), 10 deletions(-) base-commit: 99ddf2254febae9eab7fb0bcc02c5322243f5c49 -- 2.17.1
