0001 .. SPDX-License-Identifier: GPL-2.0
0002
0003 Kernel driver xdpe122
0004 =====================
0005
0006 Supported chips:
0007
0008 * Infineon XDPE11280
0009
0010 Prefix: 'xdpe11280'
0011
0012 * Infineon XDPE12254
0013
0014 Prefix: 'xdpe12254'
0015
0016 * Infineon XDPE12284
0017
0018 Prefix: 'xdpe12284'
0019
0020 Authors:
0021
0022 Vadim Pasternak <vadimp@mellanox.com>
0023
0024 Description
0025 -----------
0026
0027 This driver implements support for Infineon Multi-phase XDPE112 and XDPE122
0028 family dual loop voltage regulators.
0029 These families include XDPE11280, XDPE12284 and XDPE12254 devices.
0030 The devices from this family compliant with:
0031
0032 - Intel VR13 and VR13HC rev 1.3, IMVP8 rev 1.2 and IMPVP9 rev 1.3 DC-DC
0033 converter specification.
0034 - Intel SVID rev 1.9. protocol.
0035 - PMBus rev 1.3 interface.
0036
0037 Devices support linear format for reading input voltage, input and output current,
0038 input and output power and temperature.
0039 Device supports VID format for reading output voltage. The below modes are
0040 supported:
0041 - VR12.0 mode, 5-mV DAC - 0x01.
0042 - VR12.5 mode, 10-mV DAC - 0x02.
0043 - IMVP9 mode, 5-mV DAC - 0x03.
0044 - AMD mode 6.25mV - 0x10.
0045
0046 Devices support two pages for telemetry.
0047
0048 The driver provides for current: input, maximum and critical thresholds
0049 and maximum and critical alarms. Critical thresholds and critical alarm are
0050 supported only for current output.
0051 The driver exports the following attributes for via the sysfs files, where
0052 indexes 1, 2 are for "iin" and 3, 4 for "iout":
0053
0054 **curr[3-4]_crit**
0055
0056 **curr[3-4]_crit_alarm**
0057
0058 **curr[1-4]_input**
0059
0060 **curr[1-4]_label**
0061
0062 **curr[1-4]_max**
0063
0064 **curr[1-4]_max_alarm**
0065
0066 The driver provides for voltage: input, critical and low critical thresholds
0067 and critical and low critical alarms.
0068 The driver exports the following attributes for via the sysfs files, where
0069 indexes 1, 2 are for "vin" and 3, 4 for "vout":
0070
0071 **in[1-4]_crit**
0072
0073 **in[1-4_crit_alarm**
0074
0075 **in[1-4]_input**
0076
0077 **in[1-4_label**
0078
0079 **in[1-4]_lcrit**
0080
0081 **in[1-41_lcrit_alarm**
0082
0083 The driver provides for power: input and alarms. Power alarm is supported only
0084 for power input.
0085 The driver exports the following attributes for via the sysfs files, where
0086 indexes 1, 2 are for "pin" and 3, 4 for "pout":
0087
0088 **power[1-2]_alarm**
0089
0090 **power[1-4]_input**
0091
0092 **power[1-4]_label**
0093
0094 The driver provides for temperature: input, maximum and critical thresholds
0095 and maximum and critical alarms.
0096 The driver exports the following attributes for via the sysfs files:
0097
0098 **temp[1-2]_crit**
0099
0100 **temp[1-2]_crit_alarm**
0101
0102 **temp[1-2]_input**
0103
0104 **temp[1-2]_max**
0105
0106 **temp[1-2]_max_alarm**
