Unlike the old design that the register setting of the TACH should based on the configure of the PWM. In ast26xx, the dependency between pwm and tach controller is eliminated and becomes a separate hardware block. One is used to provide pwm output and another is used to monitor the frequency of the input. Therefore, this patch serials implements them by writing the two driver "pwm-aspeed-ast2600.c" and "tach-aspeed-ast2600.c". The former is following the pwm subsystem which can apply the existed driver to controller the fan(pwm-fan.c), beeper(pwm-beeper.c) and so on. The latter is following the sysfs interface of hwmon to creat the node for fan monitor. Changes since v3: - pwm - Remove unnecessary include header - Fix warning Prefer "GPL" over "GPL v2" - tach: - Remove the paremeter min_rpm and max_rpm and return the tach value directly without any polling or delay. - Fix warning Prefer "GPL" over "GPL v2" - dt-binding: - Replace underscore in node names with dashes - Split per subsystem Changes since v2: - pwm: - Use devm_* api to simplify the error cleanup - Fix the multi-line alignment problem - tach: - Add tach-aspeed-ast2600 to index.rst - Fix the multi-line alignment problem - Remove the tach enable/disable when read the rpm - Fix some coding format issue Changes since v1: - tach: - Add the document tach-aspeed-ast2600.rst - Use devm_* api to simplify the error cleanup. - Change hwmon register api to devm_hwmon_device_register_with_info Billy Tsai (5): dt-bindings: mfd: Add aspeed pwm-tach binding dt-bindings: pwm: Add bindings for aspeed pwm controller dt-bindings: hwmon: Add bindings for aspeed tach controller pwm: Add Aspeed ast2600 PWM support hwmon: Add Aspeed ast2600 TACH support .../bindings/hwmon/aspeed,ast2600-tach.yaml | 36 ++ .../bindings/mfd/aspeed,ast2600-pwm-tach.yaml | 73 ++++ .../bindings/pwm/aspeed,ast2600-pwm.yaml | 54 +++ Documentation/hwmon/index.rst | 1 + Documentation/hwmon/tach-aspeed-ast2600.rst | 24 ++ drivers/hwmon/Kconfig | 9 + drivers/hwmon/Makefile | 1 + drivers/hwmon/tach-aspeed-ast2600.c | 399 ++++++++++++++++++ drivers/pwm/Kconfig | 10 + drivers/pwm/Makefile | 1 + drivers/pwm/pwm-aspeed-ast2600.c | 318 ++++++++++++++ 11 files changed, 926 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml create mode 100644 Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml create mode 100644 Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml create mode 100644 Documentation/hwmon/tach-aspeed-ast2600.rst create mode 100644 drivers/hwmon/tach-aspeed-ast2600.c create mode 100644 drivers/pwm/pwm-aspeed-ast2600.c -- 2.25.1
