[PATCH V4 0/8] Add PCIe M.2 Key E connector support for NXP i.MX boards

[Sherry Sun (OSS)]

From: Sherry Sun <sherry.sun at nxp.com>

This series adds support for NXP Wi-Fi/BT combo chips (88W9098, AW693)
inserted into PCIe M.2 Key E connectors on several i.MX EVK/MEK boards.

For M.2 cards that rely on PCIe L2 link state and wake-up mechanisms, the
card must remain powered during suspend. Patch #1 uses the existing
dw_pcie_rp::skip_pwrctrl_off flag to skip power-off during suspend and skip
power-on during the init path.

Also the btnxpuart driver is extended to obtain a pwrseq descriptor via the
OF graph on the UART controller device in patch #3.

Note: Patch #4-8 in this patch set depends on the following [1] and [2]
DTS patches.
[1] https://lore.kernel.org/all/20260616105201.3214395-1-sherry.sun@oss.nxp.com/
[2] https://lore.kernel.org/all/20260630060710.3294811-1-sherry.sun@oss.nxp.com/

---
Changes in V4:
1. Add a seperate patch to move pci_pwrctrl_create_devices() to
   imx_pcie_probe() as suggested by Frank.
2. Rebase the dts patches based on [2] patchset.
3. Drop pwrseq-pcie-m2 ID patch as it got applied.

Changes in V3:
1. Move pci_pwrctrl_create_devices() to imx_pcie_probe() in parch #1,
   similar to other regulator_get calls as suggested by Frank.
2. Collected the tags.

Changes in V2:
1. Rebased on top of 7.1.0.
2. Removed the power_off error handling in patch #3 because pwrseq_put()
   would call pwrseq_power_off() to automatically clean.
3. Collected the tags.
---

Sherry Sun (8):
  PCI: imx6: Move pci_pwrctrl_create_devices() to imx_pcie_probe()
  PCI: imx6: Add skip_pwrctrl_off flag support
  Bluetooth: btnxpuart: Add M.2 Bluetooth device support using pwrseq
  arm64: dts: imx8mq-evk: Describe the PCIe M.2 Key E connector
  arm64: dts: imx95-19x19-evk: Describe the PCIe M.2 Key E connector
  arm64: dts: imx8dxl-evk: Describe the PCIe M.2 Key E connector
  arm64: dts: imx8qm-mek: Describe the PCIe M.2 Key E connector
  arm64: dts: imx8qxp-mek: Describe the PCIe M.2 Key E connector

 arch/arm64/boot/dts/freescale/imx8dxl-evk.dts | 56 +++++++++++++-----
 arch/arm64/boot/dts/freescale/imx8mq-evk.dts  | 44 ++++++++++++--
 arch/arm64/boot/dts/freescale/imx8qm-mek.dts  | 58 ++++++++++++++-----
 arch/arm64/boot/dts/freescale/imx8qxp-mek.dts | 54 ++++++++++++-----
 .../boot/dts/freescale/imx95-19x19-evk.dts    | 55 +++++++++++++-----
 drivers/bluetooth/btnxpuart.c                 | 14 +++++
 drivers/pci/controller/dwc/pci-imx6.c         | 43 ++++++++------
 7 files changed, 246 insertions(+), 78 deletions(-)

-- 
2.50.1