Commit 920fa1ff authored by Guenter Roeck's avatar Guenter Roeck Committed by Linus Torvalds
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hwmon: driver for SMM665 Six-Channel Active DC Output Controller/Monitor 



This driver adds support for the monitoring features of the Summit
Microelectronics SMM665 Six-Channel Active DC Output Controller/Monitor.

Signed-off-by: default avatarGuenter Roeck <guenter.roeck@ericsson.com>
Acked-by: default avatarJonathan Cameron <jic23@cam.ac.uk>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent cfa3b24c

Documentation/hwmon/smm665

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Kernel driver smm665

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



Supported chips:

  * Summit Microelectronics SMM465

    Prefix: 'smm465'

    Addresses scanned: -

    Datasheet:

      http://www.summitmicro.com/prod_select/summary/SMM465/SMM465DS.pdf

  * Summit Microelectronics SMM665, SMM665B

    Prefix: 'smm665'

    Addresses scanned: -

    Datasheet:

      http://www.summitmicro.com/prod_select/summary/SMM665/SMM665B_2089_20.pdf

  * Summit Microelectronics SMM665C

    Prefix: 'smm665c'

    Addresses scanned: -

    Datasheet:

      http://www.summitmicro.com/prod_select/summary/SMM665C/SMM665C_2125.pdf

  * Summit Microelectronics SMM764

    Prefix: 'smm764'

    Addresses scanned: -

    Datasheet:

      http://www.summitmicro.com/prod_select/summary/SMM764/SMM764_2098.pdf

  * Summit Microelectronics SMM766, SMM766B

    Prefix: 'smm766'

    Addresses scanned: -

    Datasheets:

      http://www.summitmicro.com/prod_select/summary/SMM766/SMM766_2086.pdf

      http://www.summitmicro.com/prod_select/summary/SMM766B/SMM766B_2122.pdf



Author: Guenter Roeck <guenter.roeck@ericsson.com>





Module Parameters

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



* vref: int

  Default: 1250 (mV)

  Reference voltage on VREF_ADC pin in mV. It should not be necessary to set

  this parameter unless a non-default reference voltage is used.





Description

-----------



[From datasheet] The SMM665 is an Active DC Output power supply Controller

that monitors, margins and cascade sequences power. The part monitors six

power supply channels as well as VDD, 12V input, two general-purpose analog

inputs and an internal temperature sensor using a 10-bit ADC.



Each monitored channel has its own high and low limits, plus a critical

limit.



Support for SMM465, SMM764, and SMM766 has been implemented but is untested.





Usage Notes

-----------



This driver does not probe for devices, since there is no register which

can be safely used to identify the chip. You will have to instantiate

the devices explicitly. When instantiating the device, you have to specify

its configuration register address.



Example: the following will load the driver for an SMM665 at address 0x57

on I2C bus #1:

$ modprobe smm665

$ echo smm665 0x57 > /sys/bus/i2c/devices/i2c-1/new_device





Sysfs entries

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



This driver uses the values in the datasheet to convert ADC register values

into the values specified in the sysfs-interface document. All attributes are

read only.



Min, max, lcrit, and crit values are used by the chip to trigger external signals

and/or other activity. Triggered signals can include HEALTHY, RST, Power Off,

or Fault depending on the chip configuration. The driver reports values as lcrit

or crit if exceeding the limits triggers RST, Power Off, or Fault, and as min or

max otherwise. For details please see the SMM665 datasheet.



For SMM465 and SMM764, values for Channel E and F are reported but undefined.



in1_input		12V input voltage (mV)

in2_input		3.3V (VDD) input voltage (mV)

in3_input		Channel A voltage (mV)

in4_input		Channel B voltage (mV)

in5_input		Channel C voltage (mV)

in6_input		Channel D voltage (mV)

in7_input		Channel E voltage (mV)

in8_input		Channel F voltage (mV)

in9_input		AIN1 voltage (mV)

in10_input		AIN2 voltage (mV)



in1_min			12v input minimum voltage (mV)

in2_min			3.3V (VDD) input minimum voltage (mV)

in3_min			Channel A minimum voltage (mV)

in4_min			Channel B minimum voltage (mV)

in5_min			Channel C minimum voltage (mV)

in6_min			Channel D minimum voltage (mV)

in7_min			Channel E minimum voltage (mV)

in8_min			Channel F minimum voltage (mV)

in9_min			AIN1 minimum voltage (mV)

in10_min		AIN2 minimum voltage (mV)



in1_max			12v input maximum voltage (mV)

in2_max			3.3V (VDD) input maximum voltage (mV)

in3_max			Channel A maximum voltage (mV)

in4_max			Channel B maximum voltage (mV)

in5_max			Channel C maximum voltage (mV)

in6_max			Channel D maximum voltage (mV)

in7_max			Channel E maximum voltage (mV)

in8_max			Channel F maximum voltage (mV)

in9_max			AIN1 maximum voltage (mV)

in10_max		AIN2 maximum voltage (mV)



in1_lcrit		12v input critical minimum voltage (mV)

in2_lcrit		3.3V (VDD) input critical minimum voltage (mV)

in3_lcrit		Channel A critical minimum voltage (mV)

in4_lcrit		Channel B critical minimum voltage (mV)

in5_lcrit		Channel C critical minimum voltage (mV)

in6_lcrit		Channel D critical minimum voltage (mV)

in7_lcrit		Channel E critical minimum voltage (mV)

in8_lcrit		Channel F critical minimum voltage (mV)

in9_lcrit		AIN1 critical minimum voltage (mV)

in10_lcrit		AIN2 critical minimum voltage (mV)



in1_crit		12v input critical maximum voltage (mV)

in2_crit		3.3V (VDD) input critical maximum voltage (mV)

in3_crit		Channel A critical maximum voltage (mV)

in4_crit		Channel B critical maximum voltage (mV)

in5_crit		Channel C critical maximum voltage (mV)

in6_crit		Channel D critical maximum voltage (mV)

in7_crit		Channel E critical maximum voltage (mV)

in8_crit		Channel F critical maximum voltage (mV)

in9_crit		AIN1 critical maximum voltage (mV)

in10_crit		AIN2 critical maximum voltage (mV)



in1_crit_alarm		12v input critical alarm

in2_crit_alarm		3.3V (VDD) input critical alarm

in3_crit_alarm		Channel A critical alarm

in4_crit_alarm		Channel B critical alarm

in5_crit_alarm		Channel C critical alarm

in6_crit_alarm		Channel D critical alarm

in7_crit_alarm		Channel E critical alarm

in8_crit_alarm		Channel F critical alarm

in9_crit_alarm		AIN1 critical alarm

in10_crit_alarm		AIN2 critical alarm



temp1_input		Chip tempererature

temp1_min		Mimimum chip tempererature

temp1_max		Maximum chip tempererature

temp1_crit		Critical chip tempererature

temp1_crit_alarm	Temperature critical alarm

MAINTAINERS

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@@ -5251,6 +5251,13 @@ M: Nicolas Pitre <nico@fluxnic.net> 
S:	Odd Fixes

F:	drivers/net/smc91x.*



SMM665 HARDWARE MONITOR DRIVER

M:	Guenter Roeck <linux@roeck-us.net>

L:	lm-sensors@lm-sensors.org

S:	Maintained

F:	Documentation/hwmon/smm665

F:	drivers/hwmon/smm665.c



SMSC47B397 HARDWARE MONITOR DRIVER

M:	"Mark M. Hoffman" <mhoffman@lightlink.com>

L:	lm-sensors@lm-sensors.org

drivers/hwmon/Kconfig

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@@ -756,6 +756,21 @@ config SENSORS_SIS5595 
	  This driver can also be built as a module.  If so, the module

	  will be called sis5595.



config SENSORS_SMM665

	tristate "Summit Microelectronics SMM665"

	depends on I2C && EXPERIMENTAL

	default n

	help

	  If you say yes here you get support for the hardware monitoring

	  features of the Summit Microelectronics SMM665/SMM665B Six-Channel

	  Active DC Output Controller / Monitor.



	  Other supported chips are SMM465, SMM665C, SMM764, and SMM766.

	  Support for those chips is untested.



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

	  be called smm665.



config SENSORS_DME1737

	tristate "SMSC DME1737, SCH311x and compatibles"

	depends on I2C && EXPERIMENTAL

drivers/hwmon/Makefile

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@@ -88,6 +88,7 @@ obj-$(CONFIG_SENSORS_PCF8591) += pcf8591.o 
obj-$(CONFIG_SENSORS_S3C)	+= s3c-hwmon.o

obj-$(CONFIG_SENSORS_SHT15)	+= sht15.o

obj-$(CONFIG_SENSORS_SIS5595)	+= sis5595.o

obj-$(CONFIG_SENSORS_SMM665)	+= smm665.o

obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o

obj-$(CONFIG_SENSORS_SMSC47M1)	+= smsc47m1.o

obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o

drivers/hwmon/smm665.c

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