linux-kernel - [PATCH v4 0/8] ipq9574: Enable PCI-Express support

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Date: Tue, 30 Apr 2024 23:07:51 -0500
From: Alexandru Gagniuc <mr.nuke.me@...il.com>
To: 
Cc: linux-kernel@...r.kernel.org,
	quic_kathirav@...cinc.com,
	Alexandru Gagniuc <mr.nuke.me@...il.com>
Subject: [PATCH v4 0/8] ipq9574: Enable PCI-Express support

There are four PCIe ports on IPQ9574, pcie0 thru pcie3. This series
addresses pcie2, which is a gen3x2 port. The board I have only uses
pcie2, and that's the only one enabled in this series. pcie3 is added
as a special request, but is untested.

I believe this makes sense as a monolithic series, as the individual
pieces are not that useful by themselves.

In v2, I've had some issues regarding the dt schema checks. For
transparency, I used the following test invocations to test:

      make dt_binding_check     DT_SCHEMA_FILES=qcom,pcie.yaml:qcom,ipq8074-qmp-pcie-phy.yaml
      make dtbs_check           DT_SCHEMA_FILES=qcom,pcie.yaml:qcom,ipq8074-qmp-pcie-phy.yaml

Changes since v3:
 - "const"ify .hw.init fields for the PCIE pipe clocks
 - Used pciephy_v5_regs_layout instead of v4 in phy-qcom-qmp-pcie.c
 - Included Manivannan's patch for qcom-pcie.c clocks
 - Dropped redundant comments in "ranges" and "interrupt-map" of pcie2.
 - Added pcie3 and pcie3_phy dts nodes
 - Moved snoc and anoc clocks to PCIe controller from PHY

Changes since v2:
 - reworked resets in qcom,pcie.yaml to resolve dt schema errors
 - constrained "reg" in qcom,pcie.yaml
 - reworked min/max intems in qcom,ipq8074-qmp-pcie-phy.yaml
 - dropped msi-parent for pcie node, as it is handled by "msi" IRQ

Changes since v1:
 - updated new tables in phy-qcom-qmp-pcie.c to use lowercase hex numbers
 - reorganized qcom,ipq8074-qmp-pcie-phy.yaml to use a single list of clocks
 - reorganized qcom,pcie.yaml to include clocks+resets per compatible
 - Renamed "pcie2_qmp_phy" label to "pcie2_phy"
 - moved "ranges" property of pcie@...00000 higher up

Alexandru Gagniuc (7):
  dt-bindings: clock: Add PCIe pipe related clocks for IPQ9574
  clk: qcom: gcc-ipq9574: Add PCIe pipe clocks
  dt-bindings: PCI: qcom: Add IPQ9574 PCIe controller
  PCI: qcom: Add support for IPQ9574
  dt-bindings: phy: qcom,ipq8074-qmp-pcie: add ipq9574 gen3x2 PHY
  phy: qcom-qmp-pcie: add support for ipq9574 gen3x2 PHY
  arm64: dts: qcom: ipq9574: add PCIe2 nodes

Alexandru Gagniuc (7):
  dt-bindings: clock: Add PCIe pipe related clocks for IPQ9574
  clk: qcom: gcc-ipq9574: Add PCIe pipe clocks
  dt-bindings: PCI: qcom: Add IPQ9574 PCIe controller
  PCI: qcom: Add support for IPQ9574
  dt-bindings: phy: qcom,ipq8074-qmp-pcie: add ipq9574 gen3x2 PHY
  phy: qcom-qmp-pcie: add support for ipq9574 gen3x2 PHY
  arm64: dts: qcom: ipq9574: add PCIe2 and PCIe3 nodes

Manivannan Sadhasivam (1):
  PCI: qcom: Switch to devm_clk_bulk_get_all() API to get the clocks
    from Devicetree

 .../devicetree/bindings/pci/qcom,pcie.yaml    |  37 ++++
 .../phy/qcom,ipq8074-qmp-pcie-phy.yaml        |   1 +
 arch/arm64/boot/dts/qcom/ipq9574.dtsi         | 178 +++++++++++++++++-
 drivers/clk/qcom/gcc-ipq9574.c                |  76 ++++++++
 drivers/pci/controller/dwc/pcie-qcom.c        | 164 +++-------------
 drivers/phy/qualcomm/phy-qcom-qmp-pcie.c      | 136 ++++++++++++-
 .../phy/qualcomm/phy-qcom-qmp-pcs-pcie-v5.h   |  14 ++
 include/dt-bindings/clock/qcom,ipq9574-gcc.h  |   4 +
 8 files changed, 469 insertions(+), 141 deletions(-)

-- 
2.40.1