PCI: cadence: Add HPA IP debugfs for LTSSM status

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Add debugfs support for HPA-based Cadence PCIe controllers. A new file
'ltssm_status' is created under debugfs, allowing users to read the
current LTSSM state as a string and raw value.

Signed-off-by: Hans Zhang <18255117159@163.com>
[mani: fixed the makefile and dropped MODULE_* macros]
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Tested-by: Aksh Garg <a-garg7@ti.com>
Link: https://patch.msgid.link/20260701073513.1101559-3-18255117159@163.com

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Hans Zhang 2026-07-01 15:35:11 +08:00 • committed by Manivannan Sadhasivam

parent b5672f9463

commit ea34744eb0

7 changed files with 400 additions and 1 deletions

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5

Documentation/ABI/testing/debugfs-cdns-pcie

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9

drivers/pci/controller/cadence/Kconfig

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1

drivers/pci/controller/cadence/Makefile

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4

drivers/pci/controller/cadence/pci-sky1.c

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208

drivers/pci/controller/cadence/pcie-cadence-debugfs.c

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21

drivers/pci/controller/cadence/pcie-cadence-host-hpa.c

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153

drivers/pci/controller/cadence/pcie-cadence.h

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