[PATCH v4 2/3] hwmon: (pmbus/adp1050): Add support for adp1051, adp1055 and ltp8800

From: Cedric Encarnacion
Date: Fri Jan 24 2025 - 10:30:09 EST

Introduce hardware monitoring support for the following devices:

ADP1051: 6 PWM for I/O Voltage, I/O Current, Temperature
ADP1055: 6 PWM for I/O Voltage, I/O Current, Power, Temperature
LTP8800-1A/-2/-4A: 150A/135A/200A DC/DC µModule Regulator

The ADP1051 and ADP1055 are similar digital controllers for high
efficiency DC-DC power conversion while the LTP8800 is a family of
step-down μModule regulators that provides microprocessor core voltage
from 54V power distribution architecture. All of the above components
features telemetry monitoring of input/output voltage, input current,
output power, and temperature over PMBus.

Co-developed-by: Alexis Czezar Torreno <alexisczezar.torreno@xxxxxxxxxx>
Signed-off-by: Alexis Czezar Torreno <alexisczezar.torreno@xxxxxxxxxx>
Signed-off-by: Cedric Encarnacion <cedricjustine.encarnacion@xxxxxxxxxx>
---
Documentation/hwmon/adp1050.rst | 71 ++++++++++++++++++++++++++++++---
drivers/hwmon/pmbus/adp1050.c | 62 ++++++++++++++++++++++++++--
2 files changed, 124 insertions(+), 9 deletions(-)

diff --git a/Documentation/hwmon/adp1050.rst b/Documentation/hwmon/adp1050.rst
index 8fa937064886..32514084fbdc 100644
--- a/Documentation/hwmon/adp1050.rst
+++ b/Documentation/hwmon/adp1050.rst
@@ -13,6 +13,32 @@ Supported chips:

Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADP1050.pdf

+ * Analog Devices ADP1051
+
+ Prefix: 'adp1051'
+
+ Addresses scanned: I2C 0x70 - 0x77
+
+ Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADP1051.pdf
+
+ * Analog Devices ADP1055
+
+ Prefix: 'adp1055'
+
+ Addresses scanned: I2C 0x4B - 0x77
+
+ Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADP1055.pdf
+
+ * Analog Devices LTP8800-1A/-2/-4A
+
+ Prefix: 'ltp8800'
+
+ Addresses scanned: -
+
+ Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/LTP8800-1A.pdf
+ https://www.analog.com/media/en/technical-documentation/data-sheets/LTP8800-2.pdf
+ https://www.analog.com/media/en/technical-documentation/data-sheets/LTP8800-4A.pdf
+
Authors:

- Radu Sabau <radu.sabau@xxxxxxxxxx>
@@ -21,14 +47,17 @@ Authors:
Description
-----------

-This driver supprts hardware monitoring for Analog Devices ADP1050 Digital
-Controller for Isolated Power Supply with PMBus interface.
+This driver supports hardware monitoring for Analog Devices ADP1050, ADP1051,
+and ADP1055 Digital Controller for Isolated Power Supply with PMBus interface,
+and the LTP8800 step-down μModule regulators.

-The ADP1050 is an advanced digital controller with a PMBus™
+The ADP1050, ADP1051, and ADP1055 are advanced digital controllers with PMBus™
interface targeting high density, high efficiency dc-to-dc power
-conversion used to monitor system temperatures, voltages and currents.
-Through the PMBus interface, the device can monitor input/output voltages,
-input current and temperature.
+conversion used to monitor system temperatures, voltages and currents. The
+LTP8800 is a family of step-down μModule regulators that provides microprocessor
+core voltage from 54V power distribution architecture. Through the PMBus
+interface, the device can monitor input/output voltages, input current and
+temperature.

Usage Notes
-----------
@@ -49,16 +78,46 @@ Sysfs Attributes
in1_label "vin"
in1_input Measured input voltage
in1_alarm Input voltage alarm
+in1_crit Critical maximum input voltage
+in1_crit_alarm Input voltage high alarm
+in1_lcrit Critical minimum input voltage
+in1_lcrit_alarm Input voltage critical low alarm
in2_label "vout1"
in2_input Measured output voltage
in2_crit Critical maximum output voltage
in2_crit_alarm Output voltage high alarm
in2_lcrit Critical minimum output voltage
in2_lcrit_alarm Output voltage critical low alarm
+in2_max Critical maximum output voltage
+in2_max_alarm Output voltage critical max alarm
+in2_min Critical minimum output voltage
+in2_min_alarm Output voltage critical min alarm
curr1_label "iin"
curr1_input Measured input current.
curr1_alarm Input current alarm
+curr1_crit Critical maximum input current
+curr1_crit_alarm Input current high alarm
+curr2_label "iout1"
+curr2_input Measured output current
+curr2_alarm Output current alarm
+curr2_crit Critical maximum output current
+curr2_crit_alarm Output current high alarm
+curr2_lcrit Critical minimum output current
+curr2_lcrit_alarm Output current critical low alarm
+curr2_max Critical maximum output current
+curr2_max_alarm Output current critical max alarm
+power1_label "pout1"
+power1_input Measured output power
+power1_crit Critical maximum output power
+power1_crit_alarm Output power high alarm
temp1_input Measured temperature
temp1_crit Critical high temperature
temp1_crit_alarm Chip temperature critical high alarm
+temp1_max Critical maximum temperature
+temp1_max_alarm Temperature critical max alarm
+temp2_input Measured temperature
+temp2_crit Critical high temperature
+temp2_crit_alarm Chip temperature critical high alarm
+temp2_max Critical maximum temperature
+temp2_max_alarm Temperature critical max alarm
================= ========================================
diff --git a/drivers/hwmon/pmbus/adp1050.c b/drivers/hwmon/pmbus/adp1050.c
index ef46c880b168..2f75e8f1424d 100644
--- a/drivers/hwmon/pmbus/adp1050.c
+++ b/drivers/hwmon/pmbus/adp1050.c
@@ -23,19 +23,75 @@ static struct pmbus_driver_info adp1050_info = {
| PMBUS_HAVE_STATUS_TEMP,
};

+static struct pmbus_driver_info adp1051_info = {
+ .pages = 1,
+ .format[PSC_VOLTAGE_IN] = linear,
+ .format[PSC_VOLTAGE_OUT] = linear,
+ .format[PSC_CURRENT_IN] = linear,
+ .format[PSC_TEMPERATURE] = linear,
+ .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN
+ | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT
+ | PMBUS_HAVE_TEMP
+ | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT
+ | PMBUS_HAVE_STATUS_INPUT
+ | PMBUS_HAVE_STATUS_TEMP,
+};
+
+static struct pmbus_driver_info adp1055_info = {
+ .pages = 1,
+ .format[PSC_VOLTAGE_IN] = linear,
+ .format[PSC_VOLTAGE_OUT] = linear,
+ .format[PSC_CURRENT_IN] = linear,
+ .format[PSC_TEMPERATURE] = linear,
+ .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN
+ | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT
+ | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3
+ | PMBUS_HAVE_POUT
+ | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT
+ | PMBUS_HAVE_STATUS_INPUT
+ | PMBUS_HAVE_STATUS_TEMP,
+};
+
+static struct pmbus_driver_info ltp8800_info = {
+ .pages = 1,
+ .format[PSC_VOLTAGE_IN] = linear,
+ .format[PSC_VOLTAGE_OUT] = linear,
+ .format[PSC_CURRENT_IN] = linear,
+ .format[PSC_TEMPERATURE] = linear,
+ .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN
+ | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT
+ | PMBUS_HAVE_TEMP
+ | PMBUS_HAVE_POUT
+ | PMBUS_HAVE_STATUS_VOUT
+ | PMBUS_HAVE_STATUS_INPUT
+ | PMBUS_HAVE_STATUS_TEMP,
+};
+
static int adp1050_probe(struct i2c_client *client)
{
- return pmbus_do_probe(client, &adp1050_info);
+ struct pmbus_driver_info *info;
+
+ info = i2c_get_match_data(client);
+ if (!info)
+ return -ENODEV;
+
+ return pmbus_do_probe(client, info);
}

static const struct i2c_device_id adp1050_id[] = {
- {"adp1050"},
+ { .name = "adp1050", .driver_data = (kernel_ulong_t)&adp1050_info},
+ { .name = "adp1051", .driver_data = (kernel_ulong_t)&adp1051_info},
+ { .name = "adp1055", .driver_data = (kernel_ulong_t)&adp1055_info},
+ { .name = "ltp8800", .driver_data = (kernel_ulong_t)&ltp8800_info},
{}
};
MODULE_DEVICE_TABLE(i2c, adp1050_id);

static const struct of_device_id adp1050_of_match[] = {
- { .compatible = "adi,adp1050"},
+ { .compatible = "adi,adp1050", .data = &adp1050_info},
+ { .compatible = "adi,adp1051", .data = &adp1051_info},
+ { .compatible = "adi,adp1055", .data = &adp1055_info},
+ { .compatible = "adi,ltp8800", .data = &ltp8800_info},
{}
};
MODULE_DEVICE_TABLE(of, adp1050_of_match);
--
2.39.5