hwmon: Add driver for MPS MPQ8785 Synchronous Step-Down Converter

Add support for mpq8785 device from Monolithic Power Systems, Inc.
(MPS) vendor. This is synchronous step-down controller.

Signed-off-by: Charles Hsu <ythsu0511@gmail.com>
Link: https://lore.kernel.org/r/20240131074822.2962078-2-ythsu0511@gmail.com
[groeck: probe_new --> probe; add MODULE_IMPORT_NS(PMBUS)]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Charles Hsu 2024-01-31 15:48:22 +08:00 committed by Guenter Roeck
parent 7e6707f7da
commit f20b4a9311
5 changed files with 195 additions and 0 deletions

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@ -164,6 +164,7 @@ Hardware Monitoring Kernel Drivers
mp2975 mp2975
mp5023 mp5023
mp5990 mp5990
mpq8785
nct6683 nct6683
nct6775 nct6775
nct7802 nct7802

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@ -0,0 +1,94 @@
.. SPDX-License-Identifier: GPL-2.0-only
Kernel driver mpq8785
=======================
Supported chips:
* MPS MPQ8785
Prefix: 'mpq8785'
Author: Charles Hsu <ythsu0511@gmail.com>
Description
-----------
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 MPQ8785 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 MPQ8785 devices 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).
The MPQ8785 requires a minimal number of readily available, standard external
components, and is available in a TLGA (5mmx6mm) package.
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**

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@ -377,6 +377,15 @@ config SENSORS_MPQ7932
This driver can also be built as a module. If so, the module will This driver can also be built as a module. If so, the module will
be called mpq7932. be called mpq7932.
config SENSORS_MPQ8785
tristate "MPS MPQ8785"
help
If you say yes here you get hardware monitoring functionality support
for power management IC MPS MPQ8785.
This driver can also be built as a module. If so, the module will
be called mpq8785.
config SENSORS_PIM4328 config SENSORS_PIM4328
tristate "Flex PIM4328 and compatibles" tristate "Flex PIM4328 and compatibles"
help help

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@ -39,6 +39,7 @@ obj-$(CONFIG_SENSORS_MP2975) += mp2975.o
obj-$(CONFIG_SENSORS_MP5023) += mp5023.o obj-$(CONFIG_SENSORS_MP5023) += mp5023.o
obj-$(CONFIG_SENSORS_MP5990) += mp5990.o obj-$(CONFIG_SENSORS_MP5990) += mp5990.o
obj-$(CONFIG_SENSORS_MPQ7932) += mpq7932.o obj-$(CONFIG_SENSORS_MPQ7932) += mpq7932.o
obj-$(CONFIG_SENSORS_MPQ8785) += mpq8785.o
obj-$(CONFIG_SENSORS_PLI1209BC) += pli1209bc.o obj-$(CONFIG_SENSORS_PLI1209BC) += pli1209bc.o
obj-$(CONFIG_SENSORS_PM6764TR) += pm6764tr.o obj-$(CONFIG_SENSORS_PM6764TR) += pm6764tr.o
obj-$(CONFIG_SENSORS_PXE1610) += pxe1610.o obj-$(CONFIG_SENSORS_PXE1610) += pxe1610.o

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@ -0,0 +1,90 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for MPS MPQ8785 Step-Down Converter
*/
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include "pmbus.h"
static int mpq8785_identify(struct i2c_client *client,
struct pmbus_driver_info *info)
{
int vout_mode;
vout_mode = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE);
if (vout_mode < 0 || vout_mode == 0xff)
return vout_mode < 0 ? vout_mode : -ENODEV;
switch (vout_mode >> 5) {
case 0:
info->format[PSC_VOLTAGE_OUT] = linear;
break;
case 1:
case 2:
info->format[PSC_VOLTAGE_OUT] = direct,
info->m[PSC_VOLTAGE_OUT] = 64;
info->b[PSC_VOLTAGE_OUT] = 0;
info->R[PSC_VOLTAGE_OUT] = 1;
break;
default:
return -ENODEV;
}
return 0;
};
static struct pmbus_driver_info mpq8785_info = {
.pages = 1,
.format[PSC_VOLTAGE_IN] = direct,
.format[PSC_CURRENT_OUT] = direct,
.format[PSC_TEMPERATURE] = direct,
.m[PSC_VOLTAGE_IN] = 4,
.b[PSC_VOLTAGE_IN] = 0,
.R[PSC_VOLTAGE_IN] = 1,
.m[PSC_CURRENT_OUT] = 16,
.b[PSC_CURRENT_OUT] = 0,
.R[PSC_CURRENT_OUT] = 0,
.m[PSC_TEMPERATURE] = 1,
.b[PSC_TEMPERATURE] = 0,
.R[PSC_TEMPERATURE] = 0,
.func[0] =
PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT |
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
.identify = mpq8785_identify,
};
static int mpq8785_probe(struct i2c_client *client)
{
return pmbus_do_probe(client, &mpq8785_info);
};
static const struct i2c_device_id mpq8785_id[] = {
{ "mpq8785", 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, mpq8785_id);
static const struct of_device_id __maybe_unused mpq8785_of_match[] = {
{ .compatible = "mps,mpq8785" },
{}
};
MODULE_DEVICE_TABLE(of, mpq8785_of_match);
static struct i2c_driver mpq8785_driver = {
.driver = {
.name = "mpq8785",
.of_match_table = of_match_ptr(mpq8785_of_match),
},
.probe = mpq8785_probe,
.id_table = mpq8785_id,
};
module_i2c_driver(mpq8785_driver);
MODULE_AUTHOR("Charles Hsu <ythsu0511@gmail.com>");
MODULE_DESCRIPTION("PMBus driver for MPS MPQ8785");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS(PMBUS);