PCI: qcom: Implement .assert_perst()

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Add support for assert_perst() for switches like TC9563, which require
configuration before the PCIe link is established. Such devices use this
function op to assert PERST# before configuring the device and once the
configuration is done they de-assert PERST#.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20251101-tc9563-v9-5-de3429f7787a@oss.qualcomm.com

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Krishna Chaitanya Chundru 2025-11-01 09:29:36 +05:30 • committed by Bjorn Helgaas

parent 3445d38207

commit 8bf3ad7675

1 changed files with 13 additions and 0 deletions

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drivers/pci/controller/dwc/pcie-qcom.c

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