1.. SPDX-License-Identifier: GPL-2.0 2 3Kernel driver xdpe122 4===================== 5 6Supported chips: 7 8 * Infineon XDPE12254 9 10 Prefix: 'xdpe12254' 11 12 * Infineon XDPE12284 13 14 Prefix: 'xdpe12284' 15 16Authors: 17 18 Vadim Pasternak <vadimp@mellanox.com> 19 20Description 21----------- 22 23This driver implements support for Infineon Multi-phase XDPE122 family 24dual loop voltage regulators. 25The family includes XDPE12284 and XDPE12254 devices. 26The devices from this family complaint with: 27 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 33Devices support linear format for reading input voltage, input and output current, 34input and output power and temperature. 35Device supports VID format for reading output voltage. The below modes are 36supported: 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 42Devices support two pages for telemetry. 43 44The driver provides for current: input, maximum and critical thresholds 45and maximum and critical alarms. Critical thresholds and critical alarm are 46supported only for current output. 47The driver exports the following attributes for via the sysfs files, where 48indexes 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 62The driver provides for voltage: input, critical and low critical thresholds 63and critical and low critical alarms. 64The driver exports the following attributes for via the sysfs files, where 65indexes 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 79The driver provides for power: input and alarms. Power alarm is supported only 80for power input. 81The driver exports the following attributes for via the sysfs files, where 82indexes 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 90The driver provides for temperature: input, maximum and critical thresholds 91and maximum and critical alarms. 92The 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** 103