This series is an early stage of the hwmon driver for the fan on the Raspberry Pi Power over Ethernet HAT [1]. At the end this should use a Device Tree Overlay. Changes by Stefan based on [2]: - reformat the downstream patches for submission - drop reboot notification - fix remaining checkpatch issues - add COMPILE_TEST to Kconfig The driver is mostly copy & paste from pwm-fan, which isn't good. Personally i see two options: 1) integrate the driver function into the pwm-fan driver (new compatible) 2) implement the core function as a PWM driver and use the pwm-fan driver on top [1] - https://www.raspberrypi.org/products/poe-hat/ [2] - https://github.com/raspberrypi/linux/commit/0f937c8dc3201ebffa6c617c616fd7c65db65959 Serge Schneider (2): dt-bindings: hwmon: Add RPi PoE HAT documentation hwmon: Add RPi PoE HAT fan driver .../devicetree/bindings/hwmon/rpi-poe-fan.txt | 55 +++ Documentation/hwmon/rpi-poe-fan | 15 + drivers/hwmon/Kconfig | 11 + drivers/hwmon/Makefile | 1 + drivers/hwmon/rpi-poe-fan.c | 414 +++++++++++++++++++++ include/soc/bcm2835/raspberrypi-firmware.h | 2 + 6 files changed, 498 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/rpi-poe-fan.txt create mode 100644 Documentation/hwmon/rpi-poe-fan create mode 100644 drivers/hwmon/rpi-poe-fan.c -- 2.7.4
