projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| e10d9e4c GR |
1 | .. SPDX-License-Identifier: GPL-2.0 |
| 2 | ||
| 3 | Kernel driver lt7182s | |
| 4 | ===================== | |
| 5 | ||
| 6 | Supported chips: | |
| 7 | ||
| 8 | * ADI LT7182S | |
| 9 | ||
| 10 | Prefix: 'lt7182s' | |
| 11 | ||
| 12 | Addresses scanned: - | |
| 13 | ||
| 14 | Datasheet: https://www.analog.com/en/products/lt7182s.html | |
| 15 | ||
| 16 | Author: Guenter Roeck <linux@roeck-us.net> | |
| 17 | ||
| 18 | ||
| 19 | Description | |
| 20 | ----------- | |
| 21 | ||
| 22 | LT7182S is a Dual Channel 6A, 20V PolyPhase Step-Down Silent Switcher with | |
| 23 | Digital Power System Management support. | |
| 24 | ||
| 25 | ||
| 26 | Usage Notes | |
| 27 | ----------- | |
| 28 | ||
| 29 | This driver does not probe for PMBus devices. You will have to instantiate | |
| 30 | devices explicitly. | |
| 31 | ||
| 32 | Example: the following commands will load the driver for a LT7182S | |
| 33 | at address 0x4f on I2C bus #4:: | |
| 34 | ||
| 35 | # modprobe lt7182s | |
| 36 | # echo lt7182s 0x4f > /sys/bus/i2c/devices/i2c-4/new_device | |
| 37 | ||
| 38 | It can also be instantiated by declaring an entry in device tree. | |
| 39 | ||
| 40 | ||
| 41 | Sysfs attributes | |
| 42 | ---------------- | |
| 43 | ||
| 44 | ======================= ==================================== | |
| 45 | curr[1-2]_label "iin[12]" | |
| 46 | curr[1-2]_input Measured input current | |
| 47 | curr[1-2]_max Maximum input current | |
| 48 | curr[1-2]_max_alarm Current high alarm | |
| 49 | ||
| 50 | curr[3-4]_label "iout[1-2]" | |
| 51 | curr[3-4]_input Measured output current | |
| 52 | curr[3-4]_highest Highest measured output current | |
| 53 | curr[3-4]_max Maximum output current | |
| 54 | curr[3-4]_max_alarm Output current high alarm | |
| 55 | ||
| 56 | in[1-2]_label "vin[12]" | |
| 57 | in[1-2]_input Measured input voltage | |
| 58 | in[1-2]_highest Highest measured input voltage | |
| 59 | in[1-2]_crit Critical maximum input voltage | |
| 60 | in[1-2]_crit_alarm Input voltage critical high alarm | |
| 61 | in[1-2]_min Minimum input voltage | |
| 62 | in[1-2]_min_alarm Input voltage low alarm | |
| 63 | in[1-2]_rated_min Rated minimum input voltage | |
| 64 | in[1-2]_rated_max Rated maximum input voltage | |
| 65 | in1_reset_history Write to reset history for all attributes | |
| 66 | ||
| 67 | in[3-5]_label "vmon[1-3]" | |
| 68 | in[3-5]_input Measured voltage on ITH1/ITH2/EXTVCC pins | |
| 69 | Only available if enabled with MFR_ADC_CONTROL_LT7182S | |
| 70 | command. | |
| 71 | ||
| 72 | in[3-4|6-7]_label "vout[1-2]" | |
| 73 | in[3-4|6-7]_input Measured output voltage | |
| 74 | in[3-4|6-7]_highest Highest measured output voltage | |
| 75 | in[3-4|6-7]_lcrit Critical minimum output voltage | |
| 76 | in[3-4|6-7]_lcrit_alarm Output voltage critical low alarm | |
| 77 | in[3-4|6-7]_min Minimum output voltage | |
| 78 | in[3-4|6-7]_max_alarm Output voltage low alarm | |
| 79 | in[3-4|6-7]_max Maximum output voltage | |
| 80 | in[3-4|6-7]_max_alarm Output voltage high alarm | |
| 81 | in[3-4|6-7]_crit Critical maximum output voltage | |
| 82 | in[3-4|6-7]_crit_alarm Output voltage critical high alarm | |
| 83 | ||
| 84 | power[1-2]_label "pout[1-2]" | |
| 85 | power[1-2]_input Measured output power | |
| 86 | ||
| 87 | temp1_input Measured temperature | |
| 88 | temp1_crit Critical high temperature | |
| 89 | temp1_crit_alarm Chip temperature critical high alarm | |
| 90 | temp1_max Maximum temperature | |
| 91 | temp1_max_alarm Chip temperature high alarm | |
| 92 | ======================= ==================================== |