projects / linux-block.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 <vadimp@mellanox.com> | |
| 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: | |
| 27 | - Intel VR13 and VR13HC rev 1.3, IMVP8 rev 1.2 and IMPVP9 rev 1.3 DC-DC | |
| 28 | converter specification. | |
| 29 | - Intel SVID rev 1.9. protocol. | |
| 30 | - PMBus rev 1.3 interface. | |
| 31 | ||
| 32 | Devices support linear format for reading input voltage, input and output current, | |
| 33 | input and output power and temperature. | |
| 34 | Device supports VID format for reading output voltage. The below modes are | |
| 35 | supported: | |
| 36 | - VR12.0 mode, 5-mV DAC - 0x01. | |
| 37 | - VR12.5 mode, 10-mV DAC - 0x02. | |
| 38 | - IMVP9 mode, 5-mV DAC - 0x03. | |
| 39 | - AMD mode 6.25mV - 0x10. | |
| 40 | ||
| 41 | Devices support two pages for telemetry. | |
| 42 | ||
| 43 | The driver provides for current: input, maximum and critical thresholds | |
| 44 | and maximum and critical alarms. Critical thresholds and critical alarm are | |
| 45 | supported only for current output. | |
| 46 | The driver exports the following attributes for via the sysfs files, where | |
| 47 | indexes 1, 2 are for "iin" and 3, 4 for "iout": | |
| 48 | ||
| 49 | **curr[3-4]_crit** | |
| 50 | ||
| 51 | **curr[3-4]_crit_alarm** | |
| 52 | ||
| 53 | **curr[1-4]_input** | |
| 54 | ||
| 55 | **curr[1-4]_label** | |
| 56 | ||
| 57 | **curr[1-4]_max** | |
| 58 | ||
| 59 | **curr[1-4]_max_alarm** | |
| 60 | ||
| 61 | The driver provides for voltage: input, critical and low critical thresholds | |
| 62 | and critical and low critical alarms. | |
| 63 | The driver exports the following attributes for via the sysfs files, where | |
| 64 | indexes 1, 2 are for "vin" and 3, 4 for "vout": | |
| 65 | ||
| 66 | **in[1-4]_crit** | |
| 67 | ||
| 68 | **in[1-4_crit_alarm** | |
| 69 | ||
| 70 | **in[1-4]_input** | |
| 71 | ||
| 72 | **in[1-4_label** | |
| 73 | ||
| 74 | **in[1-4]_lcrit** | |
| 75 | ||
| 76 | **in[1-41_lcrit_alarm** | |
| 77 | ||
| 78 | The driver provides for power: input and alarms. Power alarm is supported only | |
| 79 | for power input. | |
| 80 | The driver exports the following attributes for via the sysfs files, where | |
| 81 | indexes 1, 2 are for "pin" and 3, 4 for "pout": | |
| 82 | ||
| 83 | **power[1-2]_alarm** | |
| 84 | ||
| 85 | **power[1-4]_input** | |
| 86 | ||
| 87 | **power[1-4]_label** | |
| 88 | ||
| 89 | The driver provides for temperature: input, maximum and critical thresholds | |
| 90 | and maximum and critical alarms. | |
| 91 | The driver exports the following attributes for via the sysfs files: | |
| 92 | ||
| 93 | **temp[1-2]_crit** | |
| 94 | ||
| 95 | **temp[1-2]_crit_alarm** | |
| 96 | ||
| 97 | **temp[1-2]_input** | |
| 98 | ||
| 99 | **temp[1-2]_max** | |
| 100 | ||
| 101 | **temp[1-2]_max_alarm** |