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128 lines
3.0 KiB
128 lines
3.0 KiB
.. SPDX-License-Identifier: GPL-2.0 |
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Kernel driver mp2975 |
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==================== |
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Supported chips: |
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* MPS MP12254 |
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Prefix: 'mp2975' |
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Author: |
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Vadim Pasternak <[email protected]> |
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Description |
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----------- |
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This driver implements support for Monolithic Power Systems, Inc. (MPS) |
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vendor dual-loop, digital, multi-phase controller MP2975. |
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This device: |
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- Supports up to two power rail. |
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- Provides 8 pulse-width modulations (PWMs), and can be configured up |
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to 8-phase operation for rail 1 and up to 4-phase operation for rail |
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2. |
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- Supports two pages 0 and 1 for telemetry and also pages 2 and 3 for |
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configuration. |
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- Can configured VOUT readout in direct or VID format and allows |
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setting of different formats on rails 1 and 2. For VID the following |
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protocols are available: VR13 mode with 5-mV DAC; VR13 mode with |
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10-mV DAC, IMVP9 mode with 5-mV DAC. |
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Device supports: |
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- SVID interface. |
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- AVSBus interface. |
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Device complaint with: |
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- PMBus rev 1.3 interface. |
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Device supports direct format for reading output current, output voltage, |
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input and output power and temperature. |
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Device supports linear format for reading input voltage and input power. |
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Device supports VID and direct formats for reading output voltage. |
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The below VID modes are supported: VR12, VR13, IMVP9. |
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The driver provides the next attributes for the current: |
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- for current in: input, maximum alarm; |
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- for current out input, maximum alarm and highest values; |
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- for phase current: input and label. |
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attributes. |
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The driver exports the following attributes via the 'sysfs' files, where |
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- 'n' is number of telemetry pages (from 1 to 2); |
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- 'k' is number of configured phases (from 1 to 8); |
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- indexes 1, 1*n for "iin"; |
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- indexes n+1, n+2 for "iout"; |
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- indexes 2*n+1 ... 2*n + k for phases. |
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**curr[1-{2n}]_alarm** |
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**curr[{n+1}-{n+2}]_highest** |
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**curr[1-{2n+k}]_input** |
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**curr[1-{2n+k}]_label** |
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The driver provides the next attributes for the voltage: |
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- for voltage in: input, high critical threshold, high critical alarm, all only |
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from page 0; |
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- for voltage out: input, low and high critical thresholds, low and high |
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critical alarms, from pages 0 and 1; |
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The driver exports the following attributes via the 'sysfs' files, where |
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- 'n' is number of telemetry pages (from 1 to 2); |
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- indexes 1 for "iin"; |
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- indexes n+1, n+2 for "vout"; |
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**in[1-{2n+1}]_crit** |
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**in[1-{2n+1}]_crit_alarm** |
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**in[1-{2n+1}]_input** |
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**in[1-{2n+1}]_label** |
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**in[2-{n+1}]_lcrit** |
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**in[2-{n+1}1_lcrit_alarm** |
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The driver provides the next attributes for the power: |
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- for power in alarm and input. |
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- for power out: highest and input. |
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The driver exports the following attributes via the 'sysfs' files, where |
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- 'n' is number of telemetry pages (from 1 to 2); |
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- indexes 1 for "pin"; |
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- indexes n+1, n+2 for "pout"; |
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**power1_alarm** |
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**power[2-{n+1}]_highest** |
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**power[1-{2n+1}]_input** |
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**power[1-{2n+1}]_label** |
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The driver provides the next attributes for the temperature (only from page 0): |
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**temp1_crit** |
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**temp1_crit_alarm** |
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**temp1_input** |
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**temp1_max** |
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**temp1_max_alarm**
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