[PATCH 0/3] Initial thermal management for Lichee Pi 4A board

[Icenowy Zheng]

The SoM+Dock design of Lichee Pi 4A is quite bad at dissipating heat, so
active cooling is quite important for it.

This patchset tries to do some initial active cooling for it, by
utilizing software PWM to drive the fan.

Ths 1st patch adds PVT temperature coefficients, as seen in the SoC
manual and BSP 6.6 kernel device trees.

The 2nd patch adds thermal zone information for the 2 thermal sensors in
the PVT block.

The 3rd patch adds soft PWM + PWM fan, and makes the fan an active
cooling device of the CPU thermal zone. 

Icenowy Zheng (3):
  riscv: dts: thead: th1520: add coefficients to the PVT node
  riscv: dts: thead: th1520: add initial thermal zones
  riscv: dts: thead: th1520: add soft PWM fan for Lichee Pi 4A

 .../boot/dts/thead/th1520-lichee-pi-4a.dts    | 53 +++++++++++++++++++
 arch/riscv/boot/dts/thead/th1520.dtsi         | 29 ++++++++++
 2 files changed, 82 insertions(+)

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2.50.1