[PATCH 3/3] hwmon: (pmbus) add support for Delta E50SN12051

Colin Huang via B4 Relay
2026-04-29T09:42:06Z

Add the pmbus driver for Delta E50SN12051 600W Non-isolated
1/8th Brick DCDC Power Modules.

Signed-off-by: Colin Huang <u8813345@gmail.com>
---
drivers/hwmon/pmbus/Kconfig | 9 ++++++
drivers/hwmon/pmbus/Makefile | 1 +
drivers/hwmon/pmbus/e50sn12051.c | 60 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 70 insertions(+)

diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 8f4bff375ecb..4fbfcbc4a9c5 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -161,6 +161,15 @@ config SENSORS_DPS920AB
This driver can also be built as a module. If so, the module will
be called dps920ab.

+config SENSORS_E50SN12051
+ tristate "Delta E50SN12051 Power Modules"
+ help
+ If you say yes here you get hardware monitoring support for Delta
+ E50SN12051 Power Modules.
+
+ This driver can also be built as a module. If so, the module will
+ be called e50sn12051.
+
config SENSORS_INA233
tristate "Texas Instruments INA233 and compatibles"
help
diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
index 7129b62bc00f..fc910bf34fe3 100644
--- a/drivers/hwmon/pmbus/Makefile
+++ b/drivers/hwmon/pmbus/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_SENSORS_FSP_3Y) += fsp-3y.o
obj-$(CONFIG_SENSORS_HAC300S) += hac300s.o
obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o
obj-$(CONFIG_SENSORS_DPS920AB) += dps920ab.o
+obj-$(CONFIG_SENSORS_E50SN12051) += e50sn12051.o
obj-$(CONFIG_SENSORS_INA233) += ina233.o
obj-$(CONFIG_SENSORS_INSPUR_IPSPS) += inspur-ipsps.o
obj-$(CONFIG_SENSORS_IR35221) += ir35221.o
diff --git a/drivers/hwmon/pmbus/e50sn12051.c b/drivers/hwmon/pmbus/e50sn12051.c
new file mode 100644
index 000000000000..56935e9543b6
--- /dev/null
+++ b/drivers/hwmon/pmbus/e50sn12051.c
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Hardware monitoring driver for E50SN12051
+ */
+
+#include <linux/debugfs.h>
+#include <linux/i2c.h>
+#include <linux/kstrtox.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include "pmbus.h"
+
+static struct pmbus_driver_info e50sn12051_info = {
+ .pages = 1,
+ .format[PSC_VOLTAGE_IN] = linear,
+ .format[PSC_VOLTAGE_OUT] = linear,
+ .format[PSC_CURRENT_OUT] = linear,
+ .format[PSC_TEMPERATURE] = linear,
+ .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,
+};
+
+static const struct i2c_device_id e50sn12051_id[] = { { "e50sn12051", 0 }, {} };
+MODULE_DEVICE_TABLE(i2c, e50sn12051_id);
+
+static const struct of_device_id e50sn12051_of_match[] = {
+ { .compatible = "delta,e50sn12051" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, e50sn12051_of_match);
+
+static int e50sn12051_probe(struct i2c_client *client)
+{
+ struct pmbus_driver_info *info;
+
+ info = devm_kmemdup(&client->dev, &e50sn12051_info, sizeof(*info),
+ GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ return pmbus_do_probe(client, info);
+}
+
+static struct i2c_driver e50sn12051_driver = {
+ .driver = {
+ .name = "e50sn12051",
+ .of_match_table = e50sn12051_of_match,
+ },
+ .probe = e50sn12051_probe,
+
+ .id_table = e50sn12051_id,
+};
+
+module_i2c_driver(e50sn12051_driver);
+
+MODULE_AUTHOR("Kevin Chang <kevin.chang2@amd.com>");
+MODULE_DESCRIPTION("PMBus driver for E50SN12051");
+MODULE_LICENSE("GPL");

--
2.34.1