[PATCH v2 0/5] hw/arm: Add NPCM7XX Tachometer Device

[Hao Wu]

This patch set implements the Tachometer (a.k.a Multi Functional Timer/MFT)
device in NPCM7XX SoC. This device is used by NPCM7XX boards to measure
the RPM of PWM fans.

To provide the RPM of a certain fan, since RPM = MAX_RPM * duty_percentage.
We convert the duty output in NPCM7XX PWM module into GPIOs and feed them
into the MFT module.

The connection of PWM modules and fan modules are derived from their specific
Linux device trees and coded in hw/arm/npcm7xx_boards.c.

We amend the QTest for the PWM module to include verifying the reading from
the Tachometer is correct.

Changes since v1:
- Split implementation of device and addition to board file to separate patches
- Adapt to new Clock API and address conflicts
- Use the new clock_ns_to_ticks API to calculate tachometer counts

Hao Wu (5):
  hw/misc: Add GPIOs for duty in NPCM7xx PWM
  hw/misc: Add NPCM7XX MFT Module
  hw/arm: Add MFT device to NPCM7xx Soc
  hw/arm: Connect PWM fans in NPCM7XX boards
  tests/qtest: Test PWM fan RPM using MFT in PWM test

 docs/system/arm/nuvoton.rst    |   2 +-
 hw/arm/npcm7xx.c               |  45 ++-
 hw/arm/npcm7xx_boards.c        |  99 ++++++
 hw/misc/meson.build            |   1 +
 hw/misc/npcm7xx_mft.c          | 540 +++++++++++++++++++++++++++++++++
 hw/misc/npcm7xx_pwm.c          |   4 +
 hw/misc/trace-events           |   8 +
 include/hw/arm/npcm7xx.h       |  13 +-
 include/hw/misc/npcm7xx_mft.h  |  70 +++++
 include/hw/misc/npcm7xx_pwm.h  |   4 +-
 tests/qtest/npcm7xx_pwm-test.c | 205 ++++++++++++-
 11 files changed, 974 insertions(+), 17 deletions(-)
 create mode 100644 hw/misc/npcm7xx_mft.c
 create mode 100644 include/hw/misc/npcm7xx_mft.h

-- 
2.31.0.rc2.261.g7f71774620-goog