| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | Kernel driver raspberrypi-hwmon |
| 2 | =============================== |
| 3 | |
| 4 | Supported boards: |
| 5 | |
| 6 | * Raspberry Pi A+ (via GPIO on SoC) |
| 7 | * Raspberry Pi B+ (via GPIO on SoC) |
| 8 | * Raspberry Pi 2 B (via GPIO on SoC) |
| 9 | * Raspberry Pi 3 B (via GPIO on port expander) |
| 10 | * Raspberry Pi 3 B+ (via PMIC) |
| 11 | |
| 12 | Author: Stefan Wahren <stefan.wahren@i2se.com> |
| 13 | |
| 14 | Description |
| 15 | ----------- |
| 16 | |
| 17 | This driver periodically polls a mailbox property of the VC4 firmware to detect |
| 18 | undervoltage conditions. |
| 19 | |
| 20 | Sysfs entries |
| 21 | ------------- |
| 22 | |
| 23 | ======================= ================== |
| 24 | in0_lcrit_alarm Undervoltage alarm |
| 25 | ======================= ================== |