129 lines
3.0 KiB
ReStructuredText
129 lines
3.0 KiB
ReStructuredText
.. 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 <vadimp@nvidia.com>
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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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