summaryrefslogtreecommitdiffstats
path: root/Documentation/hwmon/lt7182s.rst
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--Documentation/hwmon/lt7182s.rst92
1 files changed, 92 insertions, 0 deletions
diff --git a/Documentation/hwmon/lt7182s.rst b/Documentation/hwmon/lt7182s.rst
new file mode 100644
index 0000000000..f7268311b1
--- /dev/null
+++ b/Documentation/hwmon/lt7182s.rst
@@ -0,0 +1,92 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Kernel driver lt7182s
+=====================
+
+Supported chips:
+
+ * ADI LT7182S
+
+ Prefix: 'lt7182s'
+
+ Addresses scanned: -
+
+ Datasheet: https://www.analog.com/en/products/lt7182s.html
+
+Author: Guenter Roeck <linux@roeck-us.net>
+
+
+Description
+-----------
+
+LT7182S is a Dual Channel 6A, 20V PolyPhase Step-Down Silent Switcher with
+Digital Power System Management support.
+
+
+Usage Notes
+-----------
+
+This driver does not probe for PMBus devices. You will have to instantiate
+devices explicitly.
+
+Example: the following commands will load the driver for a LT7182S
+at address 0x4f on I2C bus #4::
+
+ # modprobe lt7182s
+ # echo lt7182s 0x4f > /sys/bus/i2c/devices/i2c-4/new_device
+
+It can also be instantiated by declaring an entry in device tree.
+
+
+Sysfs attributes
+----------------
+
+======================= ====================================
+curr[1-2]_label "iin[12]"
+curr[1-2]_input Measured input current
+curr[1-2]_max Maximum input current
+curr[1-2]_max_alarm Current high alarm
+
+curr[3-4]_label "iout[1-2]"
+curr[3-4]_input Measured output current
+curr[3-4]_highest Highest measured output current
+curr[3-4]_max Maximum output current
+curr[3-4]_max_alarm Output current high alarm
+
+in[1-2]_label "vin[12]"
+in[1-2]_input Measured input voltage
+in[1-2]_highest Highest measured input voltage
+in[1-2]_crit Critical maximum input voltage
+in[1-2]_crit_alarm Input voltage critical high alarm
+in[1-2]_min Minimum input voltage
+in[1-2]_min_alarm Input voltage low alarm
+in[1-2]_rated_min Rated minimum input voltage
+in[1-2]_rated_max Rated maximum input voltage
+in1_reset_history Write to reset history for all attributes
+
+in[3-5]_label "vmon[1-3]"
+in[3-5]_input Measured voltage on ITH1/ITH2/EXTVCC pins
+ Only available if enabled with MFR_ADC_CONTROL_LT7182S
+ command.
+
+in[3-4|6-7]_label "vout[1-2]"
+in[3-4|6-7]_input Measured output voltage
+in[3-4|6-7]_highest Highest measured output voltage
+in[3-4|6-7]_lcrit Critical minimum output voltage
+in[3-4|6-7]_lcrit_alarm Output voltage critical low alarm
+in[3-4|6-7]_min Minimum output voltage
+in[3-4|6-7]_max_alarm Output voltage low alarm
+in[3-4|6-7]_max Maximum output voltage
+in[3-4|6-7]_max_alarm Output voltage high alarm
+in[3-4|6-7]_crit Critical maximum output voltage
+in[3-4|6-7]_crit_alarm Output voltage critical high alarm
+
+power[1-2]_label "pout[1-2]"
+power[1-2]_input Measured output power
+
+temp1_input Measured temperature
+temp1_crit Critical high temperature
+temp1_crit_alarm Chip temperature critical high alarm
+temp1_max Maximum temperature
+temp1_max_alarm Chip temperature high alarm
+======================= ====================================