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* [PATCH] hwmon: (pmbus/max34440): add support adpm12250
@ 2026-06-10  1:12 Alexis Czezar Torreno
  2026-06-10  1:19 ` sashiko-bot
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: Alexis Czezar Torreno @ 2026-06-10  1:12 UTC (permalink / raw)
  To: Guenter Roeck, Jonathan Corbet, Shuah Khan
  Cc: linux-hwmon, linux-doc, linux-kernel, Alexis Czezar Torreno

ADPM12250 is a quarter brick DC/DC Power Module. It is a high power
non-isolated converter capable of delivering regulated 12V with
continuous power level of 2500W. Uses PMBus.

Signed-off-by: Alexis Czezar Torreno <alexisczezar.torreno@analog.com>
---
ADPM12250 is a quarter brick DC/DC Power Module. It is a high power
non-isolated converter capable of delivering regulated 12V with continuous
power level of 2500W. Uses PMBus.
---
 Documentation/hwmon/max34440.rst | 27 ++++++++++++++++--------
 drivers/hwmon/pmbus/max34440.c   | 45 +++++++++++++++++++++++++++++++++++++---
 2 files changed, 60 insertions(+), 12 deletions(-)

diff --git a/Documentation/hwmon/max34440.rst b/Documentation/hwmon/max34440.rst
index d6d4fbc863d96c1008a1971d3e3245d9ce1ef688..e7421f4dbf38fc1436bbaeba71d4461a00f8cefb 100644
--- a/Documentation/hwmon/max34440.rst
+++ b/Documentation/hwmon/max34440.rst
@@ -19,6 +19,14 @@ Supported chips:
 
     Datasheet: -
 
+  * ADI ADPM12250
+
+    Prefixes: 'adpm12250'
+
+    Addresses scanned: -
+
+    Datasheet: -
+
   * Maxim MAX34440
 
     Prefixes: 'max34440'
@@ -87,11 +95,11 @@ 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, MAX34460, and
-MAX34461; PMBus DC/DC Power Module ADPM12160, and ADPM12200. The MAX34451
-supports monitoring voltage or current of 12 channels based on GIN pins. The
-MAX34460 supports 12 voltage channels, and the MAX34461 supports 16 voltage
-channels. The ADPM12160, and ADPM12200 also monitors both input and output
-of voltage and current.
+MAX34461; PMBus DC/DC Power Module ADPM12160, ADPM12200, and ADPM12250. The
+MAX34451 supports monitoring voltage or current of 12 channels based on GIN
+pins. The MAX34460 supports 12 voltage channels, and the MAX34461 supports 16
+voltage channels. The ADPM12160, ADPM12200, and ADPM12250 also monitors 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.
@@ -149,7 +157,7 @@ in[1-6]_reset_history	Write any value to reset history.
 .. note::
 
     - MAX34446 only supports in[1-4].
-    - ADPM12160, and ADPM12200 only supports in[1-2]. Label is "vin1"
+    - ADPM12160, ADPM12200, and ADPM12250 only supports in[1-2]. Label is "vin1"
       and "vout1" respectively.
 
 Curr
@@ -172,8 +180,9 @@ 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, and ADPM12200, curr[1] is "iin1" and curr[2-6]
-      are "iout[1-5]".
+    - For ADPM12160, ADPM12200, and ADPM12250, curr[1] is "iin1"
+    - For ADPM12160, and ADPM12200 curr[2-6] are "iout[1-5]".
+    - For ADPM12250, curr[2-4] are "iout[1-3]".
 
 Power
 ~~~~~
@@ -209,7 +218,7 @@ 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, and ADPM12200 only supports temp[1].
+   - ADPM12160, ADPM12200, and ADPM12250 only supports temp[1].
 
 
 .. note::
diff --git a/drivers/hwmon/pmbus/max34440.c b/drivers/hwmon/pmbus/max34440.c
index 4525b9fc56267479534251a1444aa09181615ac6..74876d2207fbe4014b8b54a9fd9682370fc3bbed 100644
--- a/drivers/hwmon/pmbus/max34440.c
+++ b/drivers/hwmon/pmbus/max34440.c
@@ -18,6 +18,7 @@
 enum chips {
 	adpm12160,
 	adpm12200,
+	adpm12250,
 	max34440,
 	max34441,
 	max34446,
@@ -97,7 +98,8 @@ static int max34440_read_word_data(struct i2c_client *client, int page,
 		break;
 	case PMBUS_VIRT_READ_IOUT_AVG:
 		if (data->id != max34446 && data->id != max34451 &&
-		    data->id != adpm12160 && data->id != adpm12200)
+		    data->id != adpm12160 && data->id != adpm12200 &&
+		    data->id != adpm12250)
 			return -ENXIO;
 		ret = pmbus_read_word_data(client, page, phase,
 					   MAX34446_MFR_IOUT_AVG);
@@ -182,7 +184,8 @@ static int max34440_write_word_data(struct i2c_client *client, int page,
 		ret = pmbus_write_word_data(client, page,
 					    MAX34440_MFR_IOUT_PEAK, 0);
 		if (!ret && (data->id == max34446 || data->id == max34451 ||
-			     data->id == adpm12160 || data->id == adpm12200))
+			     data->id == adpm12160 || data->id == adpm12200 ||
+			     data->id == adpm12250))
 			ret = pmbus_write_word_data(client, page,
 					MAX34446_MFR_IOUT_AVG, 0);
 
@@ -399,6 +402,40 @@ static struct pmbus_driver_info max34440_info[] = {
 		.read_word_data = max34440_read_word_data,
 		.write_word_data = max34440_write_word_data,
 	},
+	[adpm12250] = {
+		.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[6] = 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_word_data = max34440_read_word_data,
+		.write_word_data = max34440_write_word_data,
+	},
 	[max34440] = {
 		.pages = 14,
 		.format[PSC_VOLTAGE_IN] = direct,
@@ -635,7 +672,8 @@ static int max34440_probe(struct i2c_client *client)
 		rv = max34451_set_supported_funcs(client, data);
 		if (rv)
 			return rv;
-	} else if (data->id == adpm12160 || data->id == adpm12200) {
+	} else if (data->id == adpm12160 || data->id == adpm12200 ||
+		   data->id == adpm12250) {
 		data->iout_oc_fault_limit = PMBUS_IOUT_OC_FAULT_LIMIT;
 		data->iout_oc_warn_limit = PMBUS_IOUT_OC_WARN_LIMIT;
 	}
@@ -646,6 +684,7 @@ static int max34440_probe(struct i2c_client *client)
 static const struct i2c_device_id max34440_id[] = {
 	{ .name = "adpm12160", .driver_data = adpm12160 },
 	{ .name = "adpm12200", .driver_data = adpm12200 },
+	{ .name = "adpm12250", .driver_data = adpm12250 },
 	{ .name = "max34440", .driver_data = max34440 },
 	{ .name = "max34441", .driver_data = max34441 },
 	{ .name = "max34446", .driver_data = max34446 },

---
base-commit: 1723bc01ecc7ca2f30272685121314379ba5eb18
change-id: 20260610-dev-adpm12250-4ce6fc8c82ac

Best regards,
-- 
Alexis Czezar Torreno <alexisczezar.torreno@analog.com>


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2026-06-10  1:12 [PATCH] hwmon: (pmbus/max34440): add support adpm12250 Alexis Czezar Torreno
2026-06-10  1:19 ` sashiko-bot
2026-06-10  8:23 ` Nuno Sá
2026-06-10 13:12 ` Guenter Roeck

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