[PATCH v8 0/9] Enhancements to pcie-tegra194 driver

Manikanta Maddireddy
2026-03-24T19:10:48Z

This series[1] was originally posted by Vidya Sagar, and I have rebased
it onto 6.19.0-rc6-next. I addressed review comments and split this into
two series, one for fixes and the other is for enhancements(current).
I verified these patches on Jetson AGX Orin(Tegra234 SoC).

Disabling L1SS capability based on support-clkreq device tree property
is moved to common DWC driver, so I reworked below patch to disable
just L1.2 capability on Tegra234 SoC.
- PCI: tegra194: Disable L1.2 capability of Tegra234 EP

I added below new patches to tune the ASPM parameters, commit message of the
patch has the details on the bug and fix.
- PCI: tegra194: Use aspm-l1-entry-delay-ns DT property for L1 entrance latency
- arm64: tegra: Add aspm-l1-entry-delay-ns to PCIe nodes

I added more context in the commit message for below patch based on review
comment in V3.
- PCI: tegra194: Remove IRQF_ONESHOT flag during Endpoint interrupt registration

I fixed review comments in many patches which are posted in v7.

Manikanta Maddireddy (2):
arm64: tegra: Add aspm-l1-entry-delay-ns to PCIe nodes
PCI: tegra194: Use aspm-l1-entry-delay-ns DT property for L1 entrance
latency

Vidya Sagar (7):
PCI: tegra194: Drive CLKREQ# signal low explicitly
PCI: tegra194: Calibrate pipe to UPHY for Endpoint mode
PCI: tegra194: Remove IRQF_ONESHOT flag during Endpoint interrupt
registration
PCI: tegra194: Enable DMA interrupt
PCI: tegra194: Enable hardware hot reset mode in Endpoint
dt-bindings: PCI: tegra194: Add monitor clock support
PCI: tegra194: Add core monitor clock support

.../bindings/pci/nvidia,tegra194-pcie-ep.yaml | 6 ++-
.../bindings/pci/nvidia,tegra194-pcie.yaml | 6 ++-
arch/arm64/boot/dts/nvidia/tegra194.dtsi | 9 ++++
arch/arm64/boot/dts/nvidia/tegra234.dtsi | 16 ++++++
drivers/pci/controller/dwc/pcie-tegra194.c | 53 ++++++++++++++++++-
5 files changed, 87 insertions(+), 3 deletions(-)

--
2.34.1