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Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon updates from Guenter Roeck: - New drivers for ADC128D818, LTC2945, LTC4260, and LTC4222 - Added support for LTM4676 to ltc2978 driver - Converted several drivers to use devm_hwmon_device_register_with_groups - Various cleanup in several drivers * tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (36 commits) hwmon: (pmbus/ltc2978) Add support for LTM4676 hwmon: (pmbus/ltc2978) Add new chip ID for LTC2974 hwmon: Do not accept invalid name attributes hwmon: (max6639) Use SIMPLE_DEV_PM_OPS macro hwmon: (lm95245) Make temp2_crit_hyst read-only hwmon: (lm95245) Convert to use devm_hwmon_device_register_with_groups hwmon: (lm95245) Drop useless debug message hwmon: (lm95245) Fix hysteresis temperatures hwmon: (max6639) Convert to use devm_hwmon_device_register_with_groups hwmon: (max6639) Introduce local dev variable, and reduce noisiness hwmon: (max6650) Introduce local 'dev' variable hwmon: (max6650) Drop error message after memory allocation failures hwmon: (max6650) Convert to use devm_hwmon_device_register_with_groups hwmon: (max6650) Rearrange code to no longer require forward declarations hwmon: (ltc4215) Convert to devm_hwmon_device_register_with_groups hwmon: (coretemp) Convert to use devm_hwmon_device_register_with_groups hwmon: (coretemp) Allocate platform data with devm_kzalloc hwmon: (coretemp) Use sysfs_create_group to create sysfs attributes hwmon: (ltc4245) Remove devicetree conditionals hwmon: (ltc4245) Drop debug messages ...
This commit is contained in:
Linus Torvalds
@@ -0,0 +1,47 @@
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Kernel driver adc128d818
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========================
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Supported chips:
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* Texas Instruments ADC818D818
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Prefix: 'adc818d818'
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Addresses scanned: I2C 0x1d, 0x1e, 0x1f, 0x2d, 0x2e, 0x2f
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Datasheet: Publicly available at the TI website
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http://www.ti.com/
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Author: Guenter Roeck
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Description
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-----------
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This driver implements support for the Texas Instruments ADC128D818.
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It is described as 'ADC System Monitor with Temperature Sensor'.
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The ADC128D818 implements one temperature sensor and seven voltage sensors.
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Temperatures are measured in degrees Celsius. There is one set of limits.
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When the HOT Temperature Limit is crossed, this will cause an alarm that will
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be reasserted until the temperature drops below the HOT Hysteresis.
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Measurements are guaranteed between -55 and +125 degrees. The temperature
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measurement has a resolution of 0.5 degrees; the limits have a resolution
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of 1 degree.
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Voltage sensors (also known as IN sensors) report their values in volts.
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An alarm is triggered if the voltage has crossed a programmable minimum
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or maximum limit. Note that minimum in this case always means 'closest to
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zero'; this is important for negative voltage measurements. All voltage
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inputs can measure voltages between 0 and 2.55 volts, with a resolution
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of 0.625 mV.
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If an alarm triggers, it will remain triggered until the hardware register
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is read at least once. This means that the cause for the alarm may
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already have disappeared by the time the alarm is read. The driver
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caches the alarm status for each sensor until it is at least reported
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once, to ensure that alarms are reported to user space.
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The ADC128D818 only updates its values approximately once per second;
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reading it more often will do no harm, but will return 'old' values.
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In addition to the scanned address list, the chip can also be configured for
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addresses 0x35 to 0x37. Those addresses are not scanned. You have to instantiate
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the driver explicitly if the chip is configured for any of those addresses in
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your system.
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@@ -24,8 +24,12 @@ is given within a range of -127 to +127.875 degrees. Remote temperatures are
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given within a range of -127 to +255 degrees. Resolution depends on
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temperature input and range.
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Each sensor has its own critical limit, but the hysteresis is common to all
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two channels.
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Each sensor has its own critical limit. Additionally, there is a relative
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hysteresis value common to both critical limits. To make life easier to
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user-space applications, two absolute values are exported, one for each
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channel, but these values are of course linked. Only the local hysteresis
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can be set from user-space, and the same delta applies to the remote
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hysteresis.
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The lm95245 driver can change its update interval to a fixed set of values.
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It will round up to the next selectable interval. See the datasheet for exact
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@@ -0,0 +1,84 @@
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Kernel driver ltc2945
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=====================
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Supported chips:
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* Linear Technology LTC2945
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Prefix: 'ltc2945'
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Addresses scanned: -
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Datasheet:
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http://cds.linear.com/docs/en/datasheet/2945fa.pdf
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Author: Guenter Roeck <linux@roeck-us.net>
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Description
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-----------
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The LTC2945 is a rail-to-rail system monitor that measures current, voltage,
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and power consumption.
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Usage Notes
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-----------
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This driver does not probe for LTC2945 devices, since there is no register
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which can be safely used to identify the chip. You will have to instantiate
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the devices explicitly.
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Example: the following will load the driver for an LTC2945 at address 0x10
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on I2C bus #1:
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$ modprobe ltc2945
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$ echo ltc2945 0x10 > /sys/bus/i2c/devices/i2c-1/new_device
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Sysfs entries
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-------------
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Voltage readings provided by this driver are reported as obtained from the ADC
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registers. If a set of voltage divider resistors is installed, calculate the
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real voltage by multiplying the reported value with (R1+R2)/R2, where R1 is the
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value of the divider resistor against the measured voltage and R2 is the value
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of the divider resistor against Ground.
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Current reading provided by this driver is reported as obtained from the ADC
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Current Sense register. The reported value assumes that a 1 mOhm sense resistor
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is installed. If a different sense resistor is installed, calculate the real
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current by dividing the reported value by the sense resistor value in mOhm.
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in1_input VIN voltage (mV). Voltage is measured either at
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SENSE+ or VDD pin depending on chip configuration.
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in1_min Undervoltage threshold
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in1_max Overvoltage threshold
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in1_lowest Lowest measured voltage
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in1_highest Highest measured voltage
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in1_reset_history Write 1 to reset in1 history
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in1_min_alarm Undervoltage alarm
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in1_max_alarm Overvoltage alarm
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in2_input ADIN voltage (mV)
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in2_min Undervoltage threshold
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in2_max Overvoltage threshold
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in2_lowest Lowest measured voltage
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in2_highest Highest measured voltage
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in2_reset_history Write 1 to reset in2 history
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in2_min_alarm Undervoltage alarm
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in2_max_alarm Overvoltage alarm
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curr1_input SENSE current (mA)
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curr1_min Undercurrent threshold
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curr1_max Overcurrent threshold
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curr1_lowest Lowest measured current
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curr1_highest Highest measured current
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curr1_reset_history Write 1 to reset curr1 history
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curr1_min_alarm Undercurrent alarm
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curr1_max_alarm Overcurrent alarm
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power1_input Power (in uW). Power is calculated based on SENSE+/VDD
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voltage or ADIN voltage depending on chip configuration.
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power1_min Low lower threshold
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power1_max High power threshold
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power1_input_lowest Historical minimum power use
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power1_input_highest Historical maximum power use
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power1_reset_history Write 1 to reset power1 history
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power1_min_alarm Low power alarm
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power1_max_alarm High power alarm
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@@ -23,6 +23,10 @@ Supported chips:
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Prefix: 'ltc3883'
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Addresses scanned: -
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Datasheet: http://www.linear.com/product/ltc3883
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* Linear Technology LTM4676
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Prefix: 'ltm4676'
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Addresses scanned: -
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Datasheet: http://www.linear.com/product/ltm4676
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Author: Guenter Roeck <linux@roeck-us.net>
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@@ -33,7 +37,8 @@ Description
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LTC2974 is a quad digital power supply manager. LTC2978 is an octal power supply
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monitor. LTC2977 is a pin compatible replacement for LTC2978. LTC3880 is a dual
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output poly-phase step-down DC/DC controller. LTC3883 is a single phase
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step-down DC/DC controller.
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step-down DC/DC controller. LTM4676 is a dual 13A or single 26A uModule
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regulator.
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Usage Notes
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@@ -75,7 +80,7 @@ in[N]_label "vout[1-8]".
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LTC2974: N=2-5
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LTC2977: N=2-9
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LTC2978: N=2-9
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LTC3880: N=2-3
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LTC3880, LTM4676: N=2-3
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LTC3883: N=2
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in[N]_input Measured output voltage.
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in[N]_min Minimum output voltage.
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@@ -95,7 +100,7 @@ temp[N]_input Measured temperature.
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and temp5 reports the chip temperature.
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On LTC2977 and LTC2978, only one temperature measurement
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is supported and reports the chip temperature.
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On LTC3880, temp1 and temp2 report external
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On LTC3880 and LTM4676, temp1 and temp2 report external
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temperatures, and temp3 reports the chip temperature.
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On LTC3883, temp1 reports an external temperature,
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and temp2 reports the chip temperature.
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@@ -123,11 +128,11 @@ power[N]_label "pout[1-4]".
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LTC2974: N=1-4
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LTC2977: Not supported
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LTC2978: Not supported
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LTC3880: N=1-2
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LTC3880, LTM4676: N=1-2
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LTC3883: N=2
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power[N]_input Measured output power.
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curr1_label "iin". LTC3880 and LTC3883 only.
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curr1_label "iin". LTC3880, LTC3883, and LTM4676 only.
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curr1_input Measured input current.
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curr1_max Maximum input current.
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curr1_max_alarm Input current high alarm.
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@@ -138,7 +143,7 @@ curr[N]_label "iout[1-4]".
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LTC2974: N=1-4
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LTC2977: not supported
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LTC2978: not supported
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LTC3880: N=2-3
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LTC3880, LTM4676: N=2-3
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LTC3883: N=2
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curr[N]_input Measured output current.
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curr[N]_max Maximum output current.
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@@ -0,0 +1,56 @@
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Kernel driver ltc4260
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=====================
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Supported chips:
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* Linear Technology LTC4260
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Prefix: 'ltc4260'
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Addresses scanned: -
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Datasheet:
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http://cds.linear.com/docs/en/datasheet/4260fc.pdf
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Author: Guenter Roeck <linux@roeck-us.net>
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Description
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-----------
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The LTC4260 Hot Swap controller allows a board to be safely inserted
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and removed from a live backplane.
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Usage Notes
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-----------
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This driver does not probe for LTC4260 devices, since there is no register
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which can be safely used to identify the chip. You will have to instantiate
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the devices explicitly.
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Example: the following will load the driver for an LTC4260 at address 0x10
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on I2C bus #1:
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$ modprobe ltc4260
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$ echo ltc4260 0x10 > /sys/bus/i2c/devices/i2c-1/new_device
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Sysfs entries
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-------------
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Voltage readings provided by this driver are reported as obtained from the ADC
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registers. If a set of voltage divider resistors is installed, calculate the
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real voltage by multiplying the reported value with (R1+R2)/R2, where R1 is the
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value of the divider resistor against the measured voltage and R2 is the value
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of the divider resistor against Ground.
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Current reading provided by this driver is reported as obtained from the ADC
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Current Sense register. The reported value assumes that a 1 mOhm sense resistor
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is installed. If a different sense resistor is installed, calculate the real
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current by dividing the reported value by the sense resistor value in mOhm.
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in1_input SOURCE voltage (mV)
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in1_min_alarm Undervoltage alarm
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in1_max_alarm Overvoltage alarm
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in2_input ADIN voltage (mV)
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in2_alarm Power bad alarm
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curr1_input SENSE current (mA)
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curr1_alarm SENSE overcurrent alarm
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