mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-08-27 06:50:37 +00:00
8fcefe7812
Add support for the Monolithic Power Systems MPM3695 family. It contains four devices with suffixes: -10, -20, -25 and -100. The device is PMBus compliant and shares characteristics with the MPM82504. MPM3695-25 has different VOLTAGE_SCALE_LOOP register size [11:0] and therefore needs to have a separate compatible entry. Tested with device tree based matching (MPM3695-10). Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com> Link: https://lore.kernel.org/r/20250511035701.2607947-6-paweldembicki@gmail.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
110 lines
2.9 KiB
ReStructuredText
110 lines
2.9 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0-only
|
|
|
|
Kernel driver mpq8785
|
|
=======================
|
|
|
|
Supported chips:
|
|
|
|
* MPS MPM3695 family
|
|
* MPS MPM82504
|
|
* MPS MPQ8785
|
|
|
|
Prefix: 'mpq8785'
|
|
|
|
Author: Charles Hsu <ythsu0511@gmail.com>
|
|
|
|
Description
|
|
-----------
|
|
|
|
The MPM3695 family is a scalable, ultra-thin, fully integrated power module with
|
|
a PMBus interface. It offers a complete power solution that achieves up to
|
|
10A (-10 variant), 20A (-25 variant), 25A (-20 variant), 100A (-100 variant)
|
|
of output current with excellent load and line regulation across a wide input
|
|
voltage range. It operates at high efficiency over a wide load range, and can
|
|
be parallled to deliver higher current. Variants -10,-20 and -100 have different
|
|
voltage scale configuration register range (10 bits) than -25 version (11 bits).
|
|
|
|
The MPM82504 is a quad 25A, scalable, fully integrated power module with a PMBus
|
|
interface. The device offers a complete power solution that achieves up to 25A
|
|
per output channel. The MPM82504 has four output channels that can be paralleled
|
|
to provide 50A, 75A, or 100A of output current for flexible configurations.
|
|
The device can also operate in parallel with the MPM3695-100 and additional
|
|
MPM82504 devices to provide a higher output current. The MPM82504 operates
|
|
at high efficiency across a wide load range.
|
|
|
|
The MPQ8785 is a fully integrated, PMBus-compatible, high-frequency, synchronous
|
|
buck converter. The MPQ8785 offers a very compact solution that achieves up to
|
|
40A output current per phase, with excellent load and line regulation over a
|
|
wide input supply range. The MPQ8785 operates at high efficiency over a wide
|
|
output current load range.
|
|
|
|
The PMBus interface provides converter configurations and key parameters
|
|
monitoring.
|
|
|
|
The devices adopts MPS's proprietary multi-phase digital constant-on-time (MCOT)
|
|
control, which provides fast transient response and eases loop stabilization.
|
|
The MCOT scheme also allows multiple devices or channels to be connected in
|
|
parallel with excellent current sharing and phase interleaving for high-current
|
|
applications.
|
|
|
|
Fully integrated protection features include over-current protection (OCP),
|
|
over-voltage protection (OVP), under-voltage protection (UVP), and
|
|
over-temperature protection (OTP).
|
|
|
|
Device compliant with:
|
|
|
|
- PMBus rev 1.3 interface.
|
|
|
|
The driver exports the following attributes via the 'sysfs' files
|
|
for input voltage:
|
|
|
|
**in1_input**
|
|
|
|
**in1_label**
|
|
|
|
**in1_max**
|
|
|
|
**in1_max_alarm**
|
|
|
|
**in1_min**
|
|
|
|
**in1_min_alarm**
|
|
|
|
**in1_crit**
|
|
|
|
**in1_crit_alarm**
|
|
|
|
The driver provides the following attributes for output voltage:
|
|
|
|
**in2_input**
|
|
|
|
**in2_label**
|
|
|
|
**in2_alarm**
|
|
|
|
The driver provides the following attributes for output current:
|
|
|
|
**curr1_input**
|
|
|
|
**curr1_label**
|
|
|
|
**curr1_max**
|
|
|
|
**curr1_max_alarm**
|
|
|
|
**curr1_crit**
|
|
|
|
**curr1_crit_alarm**
|
|
|
|
The driver provides the following attributes for temperature:
|
|
|
|
**temp1_input**
|
|
|
|
**temp1_max**
|
|
|
|
**temp1_max_alarm**
|
|
|
|
**temp1_crit**
|
|
|
|
**temp1_crit_alarm**
|