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hwmon: add MP2993 driver

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Add support for MPS VR controller mp2993. This driver exposes
telemetry and limits value readings and writtings.

Signed-off-by: Noah Wang <noahwang.wang@outlook.com>
Link: https://lore.kernel.org/r/SEYPR04MB648203DC017A514837DB1204FAC72@SEYPR04MB6482.apcprd04.prod.outlook.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Noah Wang 2024-06-11 18:14:15 +08:00 committed by Guenter Roeck
parent 22ac3d2f68
commit fc37348c90
6 changed files with 429 additions and 0 deletions
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1
Documentation/hwmon/index.rst
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@ -166,6 +166,7 @@ Hardware Monitoring Kernel Drivers
mp2856
mp2888
mp2975
mp2993
mp5023
mp5990
mpq8785

150
Documentation/hwmon/mp2993.rst Normal file
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@ -0,0 +1,150 @@
.. SPDX-License-Identifier: GPL-2.0
Kernel driver mp2993
====================
Supported chips:
* MPS mp2993
Prefix: 'mp2993'
* Datasheet
https://scnbwymvp-my.sharepoint.com/:f:/g/personal/admin_scnbwy_com/Eth4kX1_J1hMsaASHiOYL4QBHU5a75r-tRfLKbHnJFdKLQ?e=vxj3DF
Author:
Noah Wang <noahwang.wang@outlook.com>
Description
-----------
This driver implements support for Monolithic Power Systems, Inc. (MPS)
MP2993 Dual Loop Digital Multi-phase Controller.
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_crit**
**in1_crit_alarm**
**in1_lcrit**
**in1_lcrit_alarm**
**in1_max**
**in1_max_alarm**
**in1_min**
**in1_min_alarm**
The driver provides the following attributes for output voltage:
**in2_input**
**in2_label**
**in2_crit**
**in2_crit_alarm**
**in2_lcrit**
**in2_lcrit_alarm**
**in3_input**
**in3_label**
**in3_crit**
**in3_crit_alarm**
**in3_lcrit**
**in3_lcrit_alarm**
The driver provides the following attributes for input current:
**curr1_input**
**curr1_label**
**curr1_max**
**curr1_max_alarm**
The driver provides the following attributes for output current:
**curr2_input**
**curr2_label**
**curr2_crit**
**curr2_crit_alarm**
**curr2_max**
**curr2_max_alarm**
**curr3_input**
**curr3_label**
**curr3_crit**
**curr3_crit_alarm**
**curr3_max**
**curr3_max_alarm**
The driver provides the following attributes for input power:
**power1_input**
**power1_label**
The driver provides the following attributes for output power:
**power2_input**
**power2_label**
**power3_input**
**power3_label**
The driver provides the following attributes for temperature:
**temp1_input**
**temp1_crit**
**temp1_crit_alarm**
**temp1_max**
**temp1_max_alarm**
**temp2_input**
**temp2_crit**
**temp2_crit_alarm**
**temp2_max**
**temp2_max_alarm**

7
MAINTAINERS
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@ -15258,6 +15258,13 @@ S: Maintained
F: Documentation/devicetree/bindings/leds/backlight/mps,mp3309c.yaml
F: drivers/video/backlight/mp3309c.c
MPS MP2993 DRIVER
M: Noah Wang <noahwang.wang@outlook.com>
L: linux-hwmon@vger.kernel.org
S: Maintained
F: Documentation/hwmon/mp2993.rst
F: drivers/hwmon/pmbus/mp2993.c
MR800 AVERMEDIA USB FM RADIO DRIVER
M: Alexey Klimov <klimov.linux@gmail.com>
L: linux-media@vger.kernel.org

9
drivers/hwmon/pmbus/Kconfig
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@ -346,6 +346,15 @@ config SENSORS_MP2975
This driver can also be built as a module. If so, the module will
be called mp2975.
config SENSORS_MP2993
tristate "MPS MP2993"
help
If you say yes here you get hardware monitoring support for MPS
MP2993 Dual Loop Digital Multi-Phase Controller.
This driver can also be built as a module. If so, the module will
be called mp2993.
config SENSORS_MP2975_REGULATOR
depends on SENSORS_MP2975 && REGULATOR
bool "Regulator support for MPS MP2975"

1
drivers/hwmon/pmbus/Makefile
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@ -37,6 +37,7 @@ obj-$(CONFIG_SENSORS_MAX8688) += max8688.o
obj-$(CONFIG_SENSORS_MP2856) += mp2856.o
obj-$(CONFIG_SENSORS_MP2888) += mp2888.o
obj-$(CONFIG_SENSORS_MP2975) += mp2975.o
obj-$(CONFIG_SENSORS_MP2993) += mp2993.o
obj-$(CONFIG_SENSORS_MP5023) += mp5023.o
obj-$(CONFIG_SENSORS_MP5990) += mp5990.o
obj-$(CONFIG_SENSORS_MPQ7932) += mpq7932.o

261
drivers/hwmon/pmbus/mp2993.c Normal file
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@ -0,0 +1,261 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Hardware monitoring driver for MPS Multi-phase Digital VR Controllers(MP2993)
*/
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include "pmbus.h"
#define MP2993_VOUT_OVUV_UINT 125
#define MP2993_VOUT_OVUV_DIV 64
#define MP2993_VIN_LIMIT_UINT 1
#define MP2993_VIN_LIMIT_DIV 8
#define MP2993_READ_VIN_UINT 1
#define MP2993_READ_VIN_DIV 32
#define MP2993_PAGE_NUM 2
#define MP2993_RAIL1_FUNC (PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | \
PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | \
PMBUS_HAVE_TEMP | PMBUS_HAVE_PIN | \
PMBUS_HAVE_IIN | \
PMBUS_HAVE_STATUS_VOUT | \
PMBUS_HAVE_STATUS_IOUT | \
PMBUS_HAVE_STATUS_TEMP | \
PMBUS_HAVE_STATUS_INPUT)
#define MP2993_RAIL2_FUNC (PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | \
PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP | \
PMBUS_HAVE_STATUS_VOUT | \
PMBUS_HAVE_STATUS_IOUT | \
PMBUS_HAVE_STATUS_TEMP | \
PMBUS_HAVE_STATUS_INPUT)
/* Converts a linear11 data exponent to a specified value */
static u16 mp2993_linear11_exponent_transfer(u16 word, u16 expect_exponent)
{
s16 exponent, mantissa, target_exponent;
exponent = ((s16)word) >> 11;
mantissa = ((s16)((word & 0x7ff) << 5)) >> 5;
target_exponent = (s16)((expect_exponent & 0x1f) << 11) >> 11;
if (exponent > target_exponent)
mantissa = mantissa << (exponent - target_exponent);
else
mantissa = mantissa >> (target_exponent - exponent);
return (mantissa & 0x7ff) | ((expect_exponent << 11) & 0xf800);
}
static int
mp2993_set_vout_format(struct i2c_client *client, int page, int format)
{
int ret;
ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
if (ret < 0)
return ret;
return i2c_smbus_write_byte_data(client, PMBUS_VOUT_MODE, format);
}
static int mp2993_identify(struct i2c_client *client, struct pmbus_driver_info *info)
{
int ret;
/* Set vout to direct format for rail1. */
ret = mp2993_set_vout_format(client, 0, PB_VOUT_MODE_DIRECT);
if (ret < 0)
return ret;
/* Set vout to direct format for rail2. */
return mp2993_set_vout_format(client, 1, PB_VOUT_MODE_DIRECT);
}
static int mp2993_read_word_data(struct i2c_client *client, int page, int phase,
int reg)
{
int ret;
switch (reg) {
case PMBUS_VOUT_OV_FAULT_LIMIT:
case PMBUS_VOUT_UV_FAULT_LIMIT:
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
ret = DIV_ROUND_CLOSEST(ret * MP2993_VOUT_OVUV_UINT, MP2993_VOUT_OVUV_DIV);
break;
case PMBUS_OT_FAULT_LIMIT:
case PMBUS_OT_WARN_LIMIT:
/*
* The MP2993 ot fault limit value and ot warn limit value
* per rail are always the same, so only PMBUS_OT_FAULT_LIMIT
* and PMBUS_OT_WARN_LIMIT register in page 0 are defined to
* indicates the limit value.
*/
ret = pmbus_read_word_data(client, 0, phase, reg);
break;
case PMBUS_READ_VIN:
/* The MP2993 vin scale is (1/32V)/Lsb */
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
ret = DIV_ROUND_CLOSEST((ret & GENMASK(9, 0)) * MP2993_READ_VIN_UINT,
MP2993_READ_VIN_DIV);
break;
case PMBUS_VIN_OV_FAULT_LIMIT:
case PMBUS_VIN_OV_WARN_LIMIT:
case PMBUS_VIN_UV_WARN_LIMIT:
case PMBUS_VIN_UV_FAULT_LIMIT:
/* The MP2993 vin limit scale is (1/8V)/Lsb */
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
ret = DIV_ROUND_CLOSEST((ret & GENMASK(7, 0)) * MP2993_VIN_LIMIT_UINT,
MP2993_VIN_LIMIT_DIV);
break;
case PMBUS_READ_IOUT:
case PMBUS_READ_IIN:
case PMBUS_IIN_OC_WARN_LIMIT:
case PMBUS_IOUT_OC_FAULT_LIMIT:
case PMBUS_IOUT_OC_WARN_LIMIT:
case PMBUS_READ_VOUT:
case PMBUS_READ_PIN:
case PMBUS_READ_POUT:
case PMBUS_READ_TEMPERATURE_1:
ret = -ENODATA;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int mp2993_write_word_data(struct i2c_client *client, int page, int reg,
u16 word)
{
int ret;
switch (reg) {
case PMBUS_VOUT_OV_FAULT_LIMIT:
case PMBUS_VOUT_UV_FAULT_LIMIT:
ret = DIV_ROUND_CLOSEST(word * MP2993_VOUT_OVUV_DIV, MP2993_VOUT_OVUV_UINT);
ret = pmbus_write_word_data(client, 0, reg, ret);
break;
case PMBUS_OT_FAULT_LIMIT:
case PMBUS_OT_WARN_LIMIT:
/*
* The MP2993 ot fault limit value and ot warn limit value
* per rail are always the same, so only PMBUS_OT_FAULT_LIMIT
* and PMBUS_OT_WARN_LIMIT register in page 0 are defined to
* config the ot limit value.
*/
ret = pmbus_write_word_data(client, 0, reg, word);
break;
case PMBUS_VIN_OV_FAULT_LIMIT:
case PMBUS_VIN_OV_WARN_LIMIT:
case PMBUS_VIN_UV_WARN_LIMIT:
case PMBUS_VIN_UV_FAULT_LIMIT:
/* The MP2993 vin limit scale is (1/8V)/Lsb */
ret = pmbus_write_word_data(client, 0, reg,
DIV_ROUND_CLOSEST(word * MP2993_VIN_LIMIT_DIV,
MP2993_VIN_LIMIT_UINT));
break;
case PMBUS_IIN_OC_WARN_LIMIT:
/*
* The PMBUS_IIN_OC_WARN_LIMIT of MP2993 is linear11 format,
* and the exponent is a constant value(5'b00000)， so the
* exponent of word parameter should be converted to 5'b00000.
*/
ret = pmbus_write_word_data(client, page, reg,
mp2993_linear11_exponent_transfer(word, 0x00));
break;
//
case PMBUS_IOUT_OC_FAULT_LIMIT:
case PMBUS_IOUT_OC_WARN_LIMIT:
/*
* The PMBUS_IOUT_OC_FAULT_LIMIT and PMBUS_IOUT_OC_WARN_LIMIT
* of MP2993 can be regarded as linear11 format, and the
* exponent is a 5'b00001 or 5'b00000. To ensure a larger
* range of limit value, so the exponent of word parameter
* should be converted to 5'b00001.
*/
ret = pmbus_write_word_data(client, page, reg,
mp2993_linear11_exponent_transfer(word, 0x01));
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static struct pmbus_driver_info mp2993_info = {
.pages = MP2993_PAGE_NUM,
.format[PSC_VOLTAGE_IN] = direct,
.format[PSC_CURRENT_IN] = linear,
.format[PSC_CURRENT_OUT] = linear,
.format[PSC_TEMPERATURE] = direct,
.format[PSC_POWER] = linear,
.format[PSC_VOLTAGE_OUT] = direct,
.m[PSC_VOLTAGE_OUT] = 1,
.R[PSC_VOLTAGE_OUT] = 3,
.b[PSC_VOLTAGE_OUT] = 0,
.m[PSC_VOLTAGE_IN] = 1,
.R[PSC_VOLTAGE_IN] = 0,
.b[PSC_VOLTAGE_IN] = 0,
.m[PSC_TEMPERATURE] = 1,
.R[PSC_TEMPERATURE] = 0,
.b[PSC_TEMPERATURE] = 0,
.func[0] = MP2993_RAIL1_FUNC,
.func[1] = MP2993_RAIL2_FUNC,
.read_word_data = mp2993_read_word_data,
.write_word_data = mp2993_write_word_data,
.identify = mp2993_identify,
};
static int mp2993_probe(struct i2c_client *client)
{
return pmbus_do_probe(client, &mp2993_info);
}
static const struct i2c_device_id mp2993_id[] = {
{"mp2993", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, mp2993_id);
static const struct of_device_id __maybe_unused mp2993_of_match[] = {
{.compatible = "mps,mp2993"},
{}
};
MODULE_DEVICE_TABLE(of, mp2993_of_match);
static struct i2c_driver mp2993_driver = {
.driver = {
.name = "mp2993",
.of_match_table = mp2993_of_match,
},
.probe = mp2993_probe,
.id_table = mp2993_id,
};
module_i2c_driver(mp2993_driver);
MODULE_AUTHOR("Noah Wang <noahwang.wang@outlook.com>");
MODULE_DESCRIPTION("PMBus driver for MPS MP2993");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS(PMBUS);