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Message-ID: <1277416861-32494-3-git-send-email-guenter.roeck@ericsson.com> Date: Thu, 24 Jun 2010 15:00:59 -0700 From: Guenter Roeck <guenter.roeck@...csson.com> To: Randy Dunlap <rdunlap@...otime.net>, Jean Delvare <khali@...ux-fr.org>, Andrew Morton <akpm@...ux-foundation.org>, "Ira W. Snyder" <iws@...o.caltech.edu>, Hans de Goede <hdegoede@...hat.com>, Mark Brown <broonie@...nsource.wolfsonmicro.com>, Samuel Ortiz <sameo@...ux.intel.com>, Jonathan Cameron <kernel@...23.retrosnub.co.uk> CC: lm-sensors@...sensors.org, linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org, Guenter Roeck <guenter.roeck@...csson.com> Subject: [PATCH v3 2/4] hwmon: SMM665 driver documentation Signed-off-by: Guenter Roeck <guenter.roeck@...csson.com> --- Documentation/hwmon/smm665 | 126 ++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 126 insertions(+), 0 deletions(-) create mode 100644 Documentation/hwmon/smm665 diff --git a/Documentation/hwmon/smm665 b/Documentation/hwmon/smm665 new file mode 100644 index 0000000..4a4bfde --- /dev/null +++ b/Documentation/hwmon/smm665 @@ -0,0 +1,126 @@ +Kernel driver smm665 +==================== + +Supported chips: + * Summit Microelectronics SMM465 + Prefix: 'smm465' + Addresses scanned: - + Datasheet: Publicly available at the Summit Microelectronics website. + * Summit Microelectronics SMM665, SMM665B + Prefix: 'smm665' + Addresses scanned: - + Datasheet: Publicly available at the Summit Microelectronics website. + * Summit Microelectronics SMM665C + Prefix: 'smm665c' + Addresses scanned: - + Datasheet: Publicly available at the Summit Microelectronics website. + * Summit Microelectronics SMM764 + Prefix: 'smm764' + Addresses scanned: - + Datasheet: Publicly available at the Summit Microelectronics website. + * Summit Microelectronics SMM766 + Prefix: 'smm766' + Addresses scanned: - + Datasheet: Publicly available at the Summit Microelectronics website. + +Author: Guenter Roeck <guenter.roeck@...csson.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 and max 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. 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_fault 12v input fault +in2_fault 3.3V (VDD) input fault +in3_fault Channel A fault +in4_fault Channel B fault +in5_fault Channel C fault +in6_fault Channel D fault +in7_fault Channel E fault +in8_fault Channel F fault +in9_fault AIN1 fault +in10_fault AIN2 fault + +temp1_input Chip tempererature +temp1_min Mimimum chip tempererature +temp1_max Maximum chip tempererature +temp1_crit Critical chip tempererature -- 1.7.0.87.g0901d -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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