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Commit 2d7a548a authored by Jaghathiswari Rankappagounder Natarajan's avatar Jaghathiswari Rankappagounder Natarajan Committed by Guenter Roeck
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drivers: hwmon: Support for ASPEED PWM/Fan tach 



The ASPEED AST2400/2500 PWM controller supports 8 PWM output ports.
The ASPEED AST2400/2500 Fan tach controller supports 16 tachometer
inputs.
The device driver matches on the device tree node. The configuration
values are read from the device tree and written to the respective
registers.
The driver provides a sysfs entries through which the user can
configure the duty-cycle value (ranging from 0 to 100 percent) and read
the fan tach rpm value.

Signed-off-by: default avatarJaghathiswari Rankappagounder Natarajan <jaghu@google.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent d702b353

Documentation/hwmon/aspeed-pwm-tacho

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Kernel driver aspeed-pwm-tacho

==============================



Supported chips:

	ASPEED AST2400/2500



Authors:

	<jaghu@google.com>



Description:

------------

This driver implements support for ASPEED AST2400/2500 PWM and Fan Tacho

controller. The PWM controller supports upto 8 PWM outputs. The Fan tacho

controller supports up to 16 tachometer inputs.



The driver provides the following sensor accesses in sysfs:



fanX_input	ro	provide current fan rotation value in RPM as reported

			by the fan to the device.



pwmX		rw	get or set PWM fan control value. This is an integer

			value between 0(off) and 255(full speed).

drivers/hwmon/Kconfig

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@@ -341,6 +341,15 @@ config SENSORS_ASB100 
	  This driver can also be built as a module.  If so, the module

	  will be called asb100.



config SENSORS_ASPEED

	tristate "ASPEED AST2400/AST2500 PWM and Fan tach driver"

	help

	  This driver provides support for ASPEED AST2400/AST2500 PWM

	  and Fan Tacho controllers.



	  This driver can also be built as a module. If so, the module

	  will be called aspeed_pwm_tacho.



config SENSORS_ATXP1

	tristate "Attansic ATXP1 VID controller"

	depends on I2C

drivers/hwmon/Makefile

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@@ -46,6 +46,7 @@ obj-$(CONFIG_SENSORS_ADT7475) += adt7475.o 
obj-$(CONFIG_SENSORS_APPLESMC)	+= applesmc.o

obj-$(CONFIG_SENSORS_ARM_SCPI)	+= scpi-hwmon.o

obj-$(CONFIG_SENSORS_ASC7621)	+= asc7621.o

obj-$(CONFIG_SENSORS_ASPEED)	+= aspeed-pwm-tacho.o

obj-$(CONFIG_SENSORS_ATXP1)	+= atxp1.o

obj-$(CONFIG_SENSORS_CORETEMP)	+= coretemp.o

obj-$(CONFIG_SENSORS_DA9052_ADC)+= da9052-hwmon.o

drivers/hwmon/aspeed-pwm-tacho.c

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