[PATCH v3 0/3] arm64: dts: qcom: PS8830 retimer clock fixes and typec0 enablement

[Xin Liu <xin.liu@oss.qualcomm.com>]

The Hamoa IoT EVK hardware design uses a Parade PS8830 retimer on
I2C3 for USB Type-C port 0. Describe the retimer and route typec0
through it to enable USB 3.0 SuperSpeed and DisplayPort Alt Mode.

Compared with v2, two new patches (1/3 and 2/3) are added. During the
v2 review [1], Konrad pointed out a suspicious clock reference. Further
checking confirmed that every PS8830 retimer on both Purwa and Hamoa
has its own on-board 25 MHz crystal wired to its XI/XO pins, so the
existing clock properties in the DTS are wrong and should be fixed.

[1] https://lore.kernel.org/all/049be278-8958-4d04-8501-7fb60d2169cc@oss.qualcomm.com/

Patch 1/3: Purwa, switch the three PS8830 nodes to on-board crystals (Fixes).
Patch 2/3: Hamoa, same for the two existing PS8830 nodes (Fixes).
Patch 3/3: Hamoa, add the typec0 PS8830 on I2C3 and drop the unused FSUSB42.

Tested on the Hamoa IoT EVK:
  - USB 3.0 SuperSpeed at 5 Gbps on typec0
  - DisplayPort Alt Mode on typec0

This series is based on the qcom tree's for-next branch
(git://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux.git for-next).

BR,
Xin Liu


Changes in v3:
 - Add purwa-iot-evk clock fix patch (1/3): replace RPMH RF clocks with
   per-retimer fixed-clock nodes inside a new clocks {} container node
 - Add hamoa-iot-evk clock fix patch (2/3): same fix for the two existing
   PS8830 retimers on hamoa
 - Replace RPMH RF clock in hamoa typec0 patch (3/3) with fixed-clock node
   inside the existing clocks {} container node
 - Split previous single hamoa patch into a clock fix (2/3) and the typec0
   feature patch (3/3)
- Link to v2: https://lore.kernel.org/all/20260803132753.994619-1-xin.liu@oss.qualcomm.com/

Changes in v2:
 - Updated the commit message to clarify that FSUSB42 is present on
   PCB but with all signal lines unconnected (NC), rather than
   "won't be populated"

Note: Changes in v2 and the Link above apply to patch 3/3 only.

- Link to v1: https://lore.kernel.org/all/20260721074145.1534100-1-xin.liu@oss.qualcomm.com/

Xin Liu (3):
  arm64: dts: qcom: purwa-iot-evk: use on-board crystal for PS8830
    retimers
  arm64: dts: qcom: hamoa-iot-evk: use on-board crystal for PS8830
    retimers
  arm64: dts: qcom: hamoa-iot-evk: switch typec0 to PS8830 retimer

 arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts | 130 +++++++++++++--------
 arch/arm64/boot/dts/qcom/purwa-iot-evk.dts |  27 ++++-
 2 files changed, 103 insertions(+), 54 deletions(-)

--
2.43.0

base-commit: a9d7ced84989ec05be09b4b8428759ef60450a0f