* [PATCH] hwmon: (pmbus/max34440): add support for adpm12886
@ 2026-09-28 4:27 Alexis Czezar Torreno
0 siblings, 0 replies; only message in thread
From: Alexis Czezar Torreno @ 2026-09-28 4:27 UTC (permalink / raw)
To: Guenter Roeck, Jonathan Corbet, Shuah Khan, Randy Dunlap
Cc: linux-hwmon, linux-doc, linux-kernel, Alexis Czezar Torreno
ADPM12886 is a 1/8 brick DC/DC converter that provides up to 98%
efficiency at half load. Can sustain output power of 1200W. Uses PMBUS.
Signed-off-by: Alexis Czezar Torreno <alexisczezar.torreno@analog.com>
---
Adds ADPM device identification and support for ADPM12886 which is a 1/8 brick
DC/DC Power Module. It is a high power non-isolated converter capable of delivering
regulated 12V with continuous power level of 1600W.
---
Documentation/hwmon/max34440.rst | 26 +++++++++++++-------
drivers/hwmon/pmbus/Kconfig | 2 +-
drivers/hwmon/pmbus/max34440.c | 51 +++++++++++++++++++++++++++++++++++-----
3 files changed, 64 insertions(+), 15 deletions(-)
diff --git a/Documentation/hwmon/max34440.rst b/Documentation/hwmon/max34440.rst
index 8ce10aa425d5db30d13f3868c3466ef32efefdee..a4848da495e6d890ec628c3686001fc7872c551b 100644
--- a/Documentation/hwmon/max34440.rst
+++ b/Documentation/hwmon/max34440.rst
@@ -35,6 +35,14 @@ Supported chips:
Datasheet: -
+ * ADI ADPM12886
+
+ Prefixes: 'adpm12886'
+
+ Addresses scanned: -
+
+ Datasheet: -
+
* Maxim MAX34440
Prefixes: 'max34440'
@@ -113,11 +121,12 @@ This driver supports multiple devices: hardware monitoring for Maxim MAX34440
PMBus 6-Channel Power-Supply Manager, MAX34441 PMBus 5-Channel Power-Supply
Manager and Intelligent Fan Controller, and MAX34446 PMBus Power-Supply Data
Logger; PMBus Voltage Monitor and Sequencers for MAX34451, MAX34452, MAX34460,
-and MAX34461; PMBus DC/DC Power Module ADPM12160, ADPM12200, ADPM12250 and
-ADPM12300. The MAX34451 and MAX34452 support monitoring voltage or current of 16
-channels based on GIN pins. The MAX34460 supports 12 voltage channels, and the
-MAX34461 supports 16 voltage channels. The ADPM12160, ADPM12200, ADPM12250 and
-ADPM12300 also monitor both input and output of voltage and current.
+and MAX34461; PMBus DC/DC Power Module ADPM12160, ADPM12200, ADPM12250,
+ADPM12300, and ADPM12886. The MAX34451 and MAX34452 support monitoring voltage
+or current of 16 channels based on GIN pins. The MAX34460 supports 12 voltage
+channels, and the MAX34461 supports 16 voltage channels. The ADPM12160, ADPM12200,
+ADPM12250, ADPM12300, and ADPM12886 also monitor both input and output of voltage
+and current.
The driver is a client driver to the core PMBus driver. Please see
Documentation/hwmon/pmbus.rst for details on PMBus client drivers.
@@ -175,7 +184,7 @@ in[1-6]_reset_history Write any value to reset history.
.. note::
- MAX34446 only supports in[1-4].
- - ADPM12160, ADPM12200, ADPM12250, and ADPM12300 only supports in[1-2].
+ - ADPM12160, ADPM12200, ADPM12250, ADPM12300, and ADPM12886 only supports in[1-2].
Label is "vin1" and "vout1" respectively.
Curr
@@ -198,9 +207,10 @@ curr[1-6]_reset_history Write any value to reset history.
- in6 and curr6 attributes only exist for MAX34440.
- MAX34446 only supports curr[1-4].
- - For ADPM12160, ADPM12200, ADPM12250, and ADPM12300, curr[1] is "iin1"
+ - For ADPM12160, ADPM12200, ADPM12250, ADPM12300, and ADPM12886, curr[1] is "iin1"
- For ADPM12160, and ADPM12200 curr[2-6] are "iout[1-5]".
- For ADPM12250, and ADPM12300 curr[2-4] are "iout[1-3]".
+ - For ADPM12886 curr[2-3] are "iout[1-2]".
Power
~~~~~
@@ -236,7 +246,7 @@ temp[1-8]_reset_history Write any value to reset history.
.. note::
- temp7 and temp8 attributes only exist for MAX34440.
- MAX34446 only supports temp[1-3].
- - ADPM12160, ADPM12200, ADPM12250, and ADPM12300 only supports temp[1].
+ - ADPM12160, ADPM12200, ADPM12250, ADPM12300, and ADPM12886 only supports temp[1].
.. note::
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index fd6641316454f00eef8d7b7502da9d76c7ed2c4e..1a91702ed6e7551772cb1ac4cba4134719bb086a 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -455,7 +455,7 @@ config SENSORS_MAX34440
If you say yes here you get hardware monitoring support for Maxim
MAX34440, MAX34441, MAX34446, MAX34451, MAX34452, MAX34460, and
MAX34461. Other compatible devices are ADPM12160, ADPM12200,
- ADPM12250, and ADPM12300.
+ ADPM12250, ADPM12300, and ADPM12886.
This driver can also be built as a module. If so, the module will
be called max34440.
diff --git a/drivers/hwmon/pmbus/max34440.c b/drivers/hwmon/pmbus/max34440.c
index 7f71dfe486438752fbbded6ed9c4172dd8ab8534..c088a57d227f563cc2978ad9a457d5dd31cad3ab 100644
--- a/drivers/hwmon/pmbus/max34440.c
+++ b/drivers/hwmon/pmbus/max34440.c
@@ -19,6 +19,7 @@ enum chips {
adpm12160,
adpm12200,
adpm12250,
+ adpm12886,
max34440,
max34441,
max34446,
@@ -114,7 +115,7 @@ static int max34440_read_word_data(struct i2c_client *client, int page,
*/
if (data->id == max34451 || data->id == max34452 ||
data->id == adpm12160 || data->id == adpm12200 ||
- data->id == adpm12250)
+ data->id == adpm12250 || data->id == adpm12886)
return -ENXIO;
ret = -ENODATA;
break;
@@ -133,7 +134,8 @@ static int max34440_read_word_data(struct i2c_client *client, int page,
case PMBUS_VIRT_READ_IOUT_AVG:
if (data->id != max34446 && data->id != max34451 &&
data->id != max34452 && data->id != adpm12160 &&
- data->id != adpm12200 && data->id != adpm12250)
+ data->id != adpm12200 && data->id != adpm12250 &&
+ data->id != adpm12886)
return -ENXIO;
ret = pmbus_read_word_data(client, page, phase,
MAX34446_MFR_IOUT_AVG);
@@ -223,7 +225,8 @@ static int max34440_write_word_data(struct i2c_client *client, int page,
MAX34440_MFR_IOUT_PEAK, 0);
if (!ret && (data->id == max34446 || data->id == max34451 ||
data->id == max34452 || data->id == adpm12160 ||
- data->id == adpm12200 || data->id == adpm12250))
+ data->id == adpm12200 || data->id == adpm12250 ||
+ data->id == adpm12886))
ret = pmbus_write_word_data(client, page,
MAX34446_MFR_IOUT_AVG, 0);
@@ -297,7 +300,7 @@ static int max34451_read_byte_data(struct i2c_client *client, int page, int reg)
*/
if (data->id == max34451 || data->id == max34452 ||
data->id == adpm12160 || data->id == adpm12200 ||
- data->id == adpm12250)
+ data->id == adpm12250 || data->id == adpm12886)
return -ENXIO;
return -ENODATA;
default:
@@ -321,7 +324,7 @@ static int max34451_write_byte_data(struct i2c_client *client, int page,
*/
if (data->id == max34451 || data->id == max34452 ||
data->id == adpm12160 || data->id == adpm12200 ||
- data->id == adpm12250)
+ data->id == adpm12250 || data->id == adpm12886)
return -ENXIO;
return -ENODATA;
default:
@@ -539,6 +542,41 @@ static struct pmbus_driver_info max34440_info[] = {
.write_byte_data = max34451_write_byte_data,
.write_word_data = max34440_write_word_data,
},
+ [adpm12886] = {
+ .pages = 19,
+ .format[PSC_VOLTAGE_IN] = direct,
+ .format[PSC_VOLTAGE_OUT] = direct,
+ .format[PSC_CURRENT_IN] = direct,
+ .format[PSC_CURRENT_OUT] = direct,
+ .format[PSC_TEMPERATURE] = direct,
+ .m[PSC_VOLTAGE_IN] = 125,
+ .b[PSC_VOLTAGE_IN] = 0,
+ .R[PSC_VOLTAGE_IN] = 0,
+ .m[PSC_VOLTAGE_OUT] = 125,
+ .b[PSC_VOLTAGE_OUT] = 0,
+ .R[PSC_VOLTAGE_OUT] = 0,
+ .m[PSC_CURRENT_IN] = 250,
+ .b[PSC_CURRENT_IN] = 0,
+ .R[PSC_CURRENT_IN] = -1,
+ .m[PSC_CURRENT_OUT] = 250,
+ .b[PSC_CURRENT_OUT] = 0,
+ .R[PSC_CURRENT_OUT] = -1,
+ .m[PSC_TEMPERATURE] = 1,
+ .b[PSC_TEMPERATURE] = 0,
+ .R[PSC_TEMPERATURE] = 2,
+ /* absent func below [18] are not for monitoring */
+ .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
+ .func[4] = PMBUS_HAVE_STATUS_IOUT,
+ .func[5] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
+ .func[9] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT,
+ .func[10] = PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_INPUT,
+ .func[14] = PMBUS_HAVE_IOUT,
+ .func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
+ .read_byte_data = max34451_read_byte_data,
+ .read_word_data = max34440_read_word_data,
+ .write_byte_data = max34451_write_byte_data,
+ .write_word_data = max34440_write_word_data,
+ },
[max34440] = {
.pages = 14,
.format[PSC_VOLTAGE_IN] = direct,
@@ -804,7 +842,7 @@ static int max34440_probe(struct i2c_client *client)
if (rv)
return rv;
} else if (data->id == adpm12160 || data->id == adpm12200 ||
- data->id == adpm12250) {
+ data->id == adpm12250 || data->id == adpm12886) {
data->iout_oc_fault_limit = PMBUS_IOUT_OC_FAULT_LIMIT;
data->iout_oc_warn_limit = PMBUS_IOUT_OC_WARN_LIMIT;
}
@@ -818,6 +856,7 @@ static const struct i2c_device_id max34440_id[] = {
{ .name = "adpm12200", .driver_data = adpm12200 },
{ .name = "adpm12250", .driver_data = adpm12250 },
{ .name = "adpm12300", .driver_data = adpm12250 },
+ { .name = "adpm12886", .driver_data = adpm12886 },
{ .name = "max34440", .driver_data = max34440 },
{ .name = "max34441", .driver_data = max34441 },
{ .name = "max34446", .driver_data = max34446 },
---
base-commit: 9edd5ab2656f040d726b5388f49ceac10bb2944f
change-id: 20260928-hwmon-next-2d766238f031
Best regards,
--
Alexis Czezar Torreno <alexisczezar.torreno@analog.com>
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