xdpe12284.rst 2.3 KB

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  1. .. SPDX-License-Identifier: GPL-2.0
  2. Kernel driver xdpe122
  3. =====================
  4. Supported chips:
  5. * Infineon XDPE12254
  6. Prefix: 'xdpe12254'
  7. * Infineon XDPE12284
  8. Prefix: 'xdpe12284'
  9. Authors:
  10. Vadim Pasternak <vadimp@mellanox.com>
  11. Description
  12. -----------
  13. This driver implements support for Infineon Multi-phase XDPE122 family
  14. dual loop voltage regulators.
  15. The family includes XDPE12284 and XDPE12254 devices.
  16. The devices from this family complaint with:
  17. - Intel VR13 and VR13HC rev 1.3, IMVP8 rev 1.2 and IMPVP9 rev 1.3 DC-DC
  18. converter specification.
  19. - Intel SVID rev 1.9. protocol.
  20. - PMBus rev 1.3 interface.
  21. Devices support linear format for reading input voltage, input and output current,
  22. input and output power and temperature.
  23. Device supports VID format for reading output voltage. The below modes are
  24. supported:
  25. - VR12.0 mode, 5-mV DAC - 0x01.
  26. - VR12.5 mode, 10-mV DAC - 0x02.
  27. - IMVP9 mode, 5-mV DAC - 0x03.
  28. - AMD mode 6.25mV - 0x10.
  29. Devices support two pages for telemetry.
  30. The driver provides for current: input, maximum and critical thresholds
  31. and maximum and critical alarms. Critical thresholds and critical alarm are
  32. supported only for current output.
  33. The driver exports the following attributes for via the sysfs files, where
  34. indexes 1, 2 are for "iin" and 3, 4 for "iout":
  35. **curr[3-4]_crit**
  36. **curr[3-4]_crit_alarm**
  37. **curr[1-4]_input**
  38. **curr[1-4]_label**
  39. **curr[1-4]_max**
  40. **curr[1-4]_max_alarm**
  41. The driver provides for voltage: input, critical and low critical thresholds
  42. and critical and low critical alarms.
  43. The driver exports the following attributes for via the sysfs files, where
  44. indexes 1, 2 are for "vin" and 3, 4 for "vout":
  45. **in[1-4]_crit**
  46. **in[1-4_crit_alarm**
  47. **in[1-4]_input**
  48. **in[1-4_label**
  49. **in[1-4]_lcrit**
  50. **in[1-41_lcrit_alarm**
  51. The driver provides for power: input and alarms. Power alarm is supported only
  52. for power input.
  53. The driver exports the following attributes for via the sysfs files, where
  54. indexes 1, 2 are for "pin" and 3, 4 for "pout":
  55. **power[1-2]_alarm**
  56. **power[1-4]_input**
  57. **power[1-4]_label**
  58. The driver provides for temperature: input, maximum and critical thresholds
  59. and maximum and critical alarms.
  60. The driver exports the following attributes for via the sysfs files:
  61. **temp[1-2]_crit**
  62. **temp[1-2]_crit_alarm**
  63. **temp[1-2]_input**
  64. **temp[1-2]_max**
  65. **temp[1-2]_max_alarm**