[PATCH V2 0/8] PCI: tegra: Add Tegra234 PCIe support

Vidya Sagar
2022-04-23T12:49:13Z

Tegra234 has a total of 11 PCIe controllers based on Synopsys DesignWare core.
There are three Universal PHY (UPHY) blocks (viz. HSIO, NVHS and GBE) with
each block supporting 8 lanes respectively. Controllers:0~4 use UPHY lanes
from HSIO block, Controllers:5,6 use UPHY lanes from NVHS block and
Controllers:7~10 use UPHY lanes from GBE block. Lane mapping in each block
is controlled in XBAR module by BPMP-FW. Since PCIe core has PIPE interface,
a glue module called PIPE-to-UPHY (P2U) is used to connect each UPHY lane
(applicable to all three UPHY bricks i.e. HSIO/NVHS/GBE) to PCIe controller.
This patch series
- Adds support for Tegra234 in the existing P2U PHY driver
- Adds support for Tegra234 in the existing PCIe platform controller driver
- Adds device tree nodes for all PCIe controllers
- Enables nodes applicable to P3737-0000 platform

Testing done on P3737-0000 platform
- PCIe link is up with on-board Broadcom WiFi controller

- PCIe link is up with an NVMe drive connected to M.2 Key-M slot and its
functionality is verified

- PCIe link is up with a variety of cards (NICs and USB3.0 add-on cards)
connected to CEM slot and their functionality is verified

V2:
* Dropped 3 patches that add clocks & resets IDs, power-domain IDs and
memory IDs for PCIe controllers as the patches are already available
in linux-next
* Based on Bjorn's review comment, reverted the commit b57256918399 ("PCI:
tegra194: Rename tegra_pcie_dw to tegra194_pcie") and pushed it as a
separate patch before adding support for T234 in the existing driver
* Addressed review comments from Rob for the other changes

Vidya Sagar (8):
dt-bindings: PHY: P2U: Add support for Tegra234 P2U block
dt-bindings: PCI: tegra: Add device tree support for Tegra234
arm64: tegra: Add P2U and PCIe controller nodes to Tegra234 DT
arm64: tegra: Enable PCIe slots in P3737-0000 board
phy: tegra: Add PCIe PIPE2UPHY support for Tegra234
PCI: Disable MSI for Tegra234 root ports
Revert "PCI: tegra194: Rename tegra_pcie_dw to tegra194_pcie"
PCI: tegra: Add Tegra234 PCIe support

.../bindings/pci/nvidia,tegra194-pcie.txt | 104 ++-
.../bindings/phy/phy-tegra194-p2u.yaml | 17 +-
.../nvidia/tegra234-p3737-0000+p3701-0000.dts | 25 +
arch/arm64/boot/dts/nvidia/tegra234.dtsi | 775 ++++++++++++++++++
drivers/pci/controller/dwc/pcie-tegra194.c | 622 +++++++++-----
drivers/pci/quirks.c | 13 +-
drivers/phy/tegra/phy-tegra194-p2u.c | 48 +-
7 files changed, 1396 insertions(+), 208 deletions(-)

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2.17.1