Support for ASPEED AST2400/AST2500 PWM and Fan Tach driver. Patches based on the upstream tag 4.9. Changes made in Version 4 are indicated in the individual patches. The AST2400/AST2500 PWM controller can support 8 PWM output ports. The AST2400/AST2500 Fan Tach controller can support 16 tachometer inputs. The hwmon driver provides sysfs entries through which the user can configure the duty cycle for the particular PWM output port and read the fan rpm value for the particular tachometer input. Added devicetree binding documentation for AST2400/AST2500 PWM and Fan Tach support. Tested on Zaius board (which has AST2500 chip) and observed that when duty cycle is lowered then the fan speed is lowered and lower fan rpm value( corresponding to the duty cycle) is reported and when the duty cycle is increased then the fan speed increases and higher fan rpm value(corresponding to the duty cycle) is reported. Jaghathiswari Rankappagounder Natarajan (2): Documentation: dt-bindings: Document bindings for ASPEED AST2400/AST2500 PWM and Fan tach controller device driver drivers: hwmon: Support for ASPEED PWM/Fan tach .../devicetree/bindings/hwmon/aspeed-pwm-tacho.txt | 68 ++ Documentation/hwmon/aspeed-pwm-tacho | 22 + drivers/hwmon/Kconfig | 13 +- drivers/hwmon/Makefile | 1 + drivers/hwmon/aspeed-pwm-tacho.c | 854 +++++++++++++++++++++ 5 files changed, 956 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed-pwm-tacho.txt create mode 100644 Documentation/hwmon/aspeed-pwm-tacho create mode 100644 drivers/hwmon/aspeed-pwm-tacho.c -- 2.12.1.578.ge9c3154ca4-goog -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html