projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 971dfd8c VP |
1 | .. SPDX-License-Identifier: GPL-2.0 |
| 2 | ||
| 3 | Kernel driver xdpe122 | |
| 4 | ===================== | |
| 5 | ||
| 6 | Supported chips: | |
| 7 | ||
| 8 | * Infineon XDPE12254 | |
| 9 | ||
| 10 | Prefix: 'xdpe12254' | |
| 11 | ||
| 12 | * Infineon XDPE12284 | |
| 13 | ||
| 14 | Prefix: 'xdpe12284' | |
| 15 | ||
| 16 | Authors: | |
| 17 | ||
| 18 | Vadim Pasternak <[email protected]> | |
| 19 | ||
| 20 | Description | |
| 21 | ----------- | |
| 22 | ||
| 23 | This driver implements support for Infineon Multi-phase XDPE122 family | |
| 24 | dual loop voltage regulators. | |
| 25 | The family includes XDPE12284 and XDPE12254 devices. | |
| 26 | The devices from this family complaint with: | |
| 0a923a76 | 27 | |
| 971dfd8c VP |
28 | - Intel VR13 and VR13HC rev 1.3, IMVP8 rev 1.2 and IMPVP9 rev 1.3 DC-DC |
| 29 | converter specification. | |
| 30 | - Intel SVID rev 1.9. protocol. | |
| 31 | - PMBus rev 1.3 interface. | |
| 32 | ||
| 33 | Devices support linear format for reading input voltage, input and output current, | |
| 34 | input and output power and temperature. | |
| 35 | Device supports VID format for reading output voltage. The below modes are | |
| 36 | supported: | |
| 37 | - VR12.0 mode, 5-mV DAC - 0x01. | |
| 38 | - VR12.5 mode, 10-mV DAC - 0x02. | |
| 39 | - IMVP9 mode, 5-mV DAC - 0x03. | |
| 40 | - AMD mode 6.25mV - 0x10. | |
| 41 | ||
| 42 | Devices support two pages for telemetry. | |
| 43 | ||
| 44 | The driver provides for current: input, maximum and critical thresholds | |
| 45 | and maximum and critical alarms. Critical thresholds and critical alarm are | |
| 46 | supported only for current output. | |
| 47 | The driver exports the following attributes for via the sysfs files, where | |
| 48 | indexes 1, 2 are for "iin" and 3, 4 for "iout": | |
| 49 | ||
| 50 | **curr[3-4]_crit** | |
| 51 | ||
| 52 | **curr[3-4]_crit_alarm** | |
| 53 | ||
| 54 | **curr[1-4]_input** | |
| 55 | ||
| 56 | **curr[1-4]_label** | |
| 57 | ||
| 58 | **curr[1-4]_max** | |
| 59 | ||
| 60 | **curr[1-4]_max_alarm** | |
| 61 | ||
| 62 | The driver provides for voltage: input, critical and low critical thresholds | |
| 63 | and critical and low critical alarms. | |
| 64 | The driver exports the following attributes for via the sysfs files, where | |
| 65 | indexes 1, 2 are for "vin" and 3, 4 for "vout": | |
| 66 | ||
| 67 | **in[1-4]_crit** | |
| 68 | ||
| 69 | **in[1-4_crit_alarm** | |
| 70 | ||
| 71 | **in[1-4]_input** | |
| 72 | ||
| 73 | **in[1-4_label** | |
| 74 | ||
| 75 | **in[1-4]_lcrit** | |
| 76 | ||
| 77 | **in[1-41_lcrit_alarm** | |
| 78 | ||
| 79 | The driver provides for power: input and alarms. Power alarm is supported only | |
| 80 | for power input. | |
| 81 | The driver exports the following attributes for via the sysfs files, where | |
| 82 | indexes 1, 2 are for "pin" and 3, 4 for "pout": | |
| 83 | ||
| 84 | **power[1-2]_alarm** | |
| 85 | ||
| 86 | **power[1-4]_input** | |
| 87 | ||
| 88 | **power[1-4]_label** | |
| 89 | ||
| 90 | The driver provides for temperature: input, maximum and critical thresholds | |
| 91 | and maximum and critical alarms. | |
| 92 | The driver exports the following attributes for via the sysfs files: | |
| 93 | ||
| 94 | **temp[1-2]_crit** | |
| 95 | ||
| 96 | **temp[1-2]_crit_alarm** | |
| 97 | ||
| 98 | **temp[1-2]_input** | |
| 99 | ||
| 100 | **temp[1-2]_max** | |
| 101 | ||
| 102 | **temp[1-2]_max_alarm** |