[PATCH linux v2 0/3] ASPEED AST2500 PWM support

[Jaghathiswari Rankappagounder Natarajan]

Support for ASPEED AST2500 PWM driver.
The AST2500 PWM controller can support 8 PWM output ports.
There can be three different PWM sources (Type M, N and O); each PWM
source can have different settings.
Each PWM output port can have one of the three different PWM sources.
There is a sysfs file through which the user can configure the duty cycle
for the particular PWM output port.
Added devicetree binding documentation for ast2500 pwm support.
Added support in Zaius platform for 4 PWM output ports since it has
four fans.

Tested on Zaius board and observed that when duty cycle is lowered
then the fan speed is lowered and when the duty cycle is increased
then the fan speed increases.

Tested on AST2500 EVB board and observed the PWM output pulses come
correctly based on the given settings using Logic Saleae Analyzer.

Jaghathiswari Rankappagounder Natarajan (3):
  devicetree: binding documentation update for ASPEED AST2500 PWM driver
  drivers: hwmon: ASPEED AST2500 PWM driver
  devicetree : Add support in Zaius platform for 4 PWM output ports

 .../bindings/hwmon/aspeed,ast2500-pwm.txt          | 116 ++++
 arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts         |  43 ++
 drivers/hwmon/Kconfig                              |   5 +
 drivers/hwmon/Makefile                             |   2 +-
 drivers/hwmon/aspeed_ast2500_pwm.c                 | 662 +++++++++++++++++++++
 drivers/hwmon/aspeed_ast2500_pwm.h                 | 128 ++++
 6 files changed, 955 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed,ast2500-pwm.txt
 create mode 100644 drivers/hwmon/aspeed_ast2500_pwm.c
 create mode 100644 drivers/hwmon/aspeed_ast2500_pwm.h

--
2.8.0.rc3.226.g39d4020