[PATCH 0/2] interconnect: qcom: add MSM8x60 (MSM8660/APQ8060) NoC driver

[Herman van Hazendonk <github.com@herrie.org>]

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.

Signed-off-by: Herman van Hazendonk <github.com@herrie.org>

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