interconnect: qcom: add MSM8x60 (MSM8660/APQ8060) NoC driver

Add interconnect support for the MSM8x60 family (MSM8260, MSM8660, APQ8060) — Qualcomm's Scorpion dual-core SoC generation used in devices like the HP TouchPad, HTC EVO 3D and HTC Sensation.

The chip's Network-on-Chip fabric is divided into four sub-fabrics:

AFAB - Applications fabric: Scorpion CPU + L2 cache, paths to EBI SFAB - System fabric: DMA engines, SPS, USB HS, LPASS, MSS MMFAB - Multimedia fabric: MDP, GPU, camera (VFE/JPEG), video codec DFAB - Daytona fabric: eMMC/SD (SDC), ADM DMA, USB voter

Bandwidth requests are committed to the RPM firmware via its shared-memory arbitration tables using the qcom-rpm driver backend; each fabric also has a bus clock whose rate is derived from the aggregated bandwidth.

The driver includes a 384 MHz bus clock floor, replacing the previous 266 MHz minimum that caused USB starvation on real hardware, and careful devm/device_link lifecycle to handle EPROBE_DEFER from both RPM and clock lookups without leaking clock prepare/enable references.

Herman van Hazendonk (2):
dt-bindings: interconnect: qcom: add msm8660 fabric IDs
interconnect: qcom: add MSM8x60 NoC driver

 drivers/interconnect/qcom/Kconfig             |   14 +
 drivers/interconnect/qcom/Makefile            |    2 +
 drivers/interconnect/qcom/msm8660.c           | 1147 +++++++++++++++++
 .../dt-bindings/interconnect/qcom,msm8660.h   |  156 +++
 4 files changed, 1319 insertions(+)
 create mode 100644 drivers/interconnect/qcom/msm8660.c
 create mode 100644 include/dt-bindings/interconnect/qcom,msm8660.h

base-commit: 944125b4c454b58d2fe6e35f1087a932b2050dff

2.43.0