linux-kernel - [PATCH 1/3] hwmon: (pmbus) Add Delta Q54SN120A1 Q54SW120A7 driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20260205-add-q54sn120a1-q54q54sw120a7-v1-1-09061ecacfc7@gmail.com>
Date: Thu, 05 Feb 2026 21:34:35 +0800
From: Colin Huang <u8813345@...il.com>
To: Guenter Roeck <linux@...ck-us.net>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Jonathan Corbet <corbet@....net>
Cc: linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-doc@...r.kernel.org, Colin.Huang2@....com, 
 Carl.Lee@....com, Peter.Shen@....com, Colin Huang <u8813345@...il.com>
Subject: [PATCH 1/3] hwmon: (pmbus) Add Delta Q54SN120A1 Q54SW120A7 driver

Add the pmbus driver for DELTA Q54SN120A1, Q54SW120A7,
1/4 Brick DC/DC Regulated Power Module with PMBus support

Signed-off-by: Colin Huang <u8813345@...il.com>
---
 drivers/hwmon/pmbus/q54sj108a2.c | 47 ++++++++++++++++++++++++++++++++++++----
 1 file changed, 43 insertions(+), 4 deletions(-)

diff --git a/drivers/hwmon/pmbus/q54sj108a2.c b/drivers/hwmon/pmbus/q54sj108a2.c
index 4d7086d83aa3..dca084c98fba 100644
--- a/drivers/hwmon/pmbus/q54sj108a2.c
+++ b/drivers/hwmon/pmbus/q54sj108a2.c
@@ -21,7 +21,9 @@
 #define PMBUS_FLASH_KEY_WRITE		0xEC
 
 enum chips {
-	q54sj108a2
+	q54sj108a2,
+	q54sn120a1,
+	q54sw120a7
 };
 
 enum {
@@ -62,6 +64,34 @@ static struct pmbus_driver_info q54sj108a2_info[] = {
 		.format[PSC_VOLTAGE_IN] = linear,
 		.format[PSC_CURRENT_OUT] = linear,
 
+		.func[0] = PMBUS_HAVE_VIN |
+		PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
+		PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
+		PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
+		PMBUS_HAVE_STATUS_INPUT,
+	},
+	[q54sn120a1] = {
+		.pages = 1,
+
+		/* Source : Delta Q54SN120A1 */
+		.format[PSC_TEMPERATURE] = linear,
+		.format[PSC_VOLTAGE_IN] = linear,
+		.format[PSC_CURRENT_OUT] = linear,
+
+		.func[0] = PMBUS_HAVE_VIN |
+		PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
+		PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
+		PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
+		PMBUS_HAVE_STATUS_INPUT,
+	},
+	[q54sw120a7] = {
+		.pages = 1,
+
+		/* Source : Delta Q54SW120A7 */
+		.format[PSC_TEMPERATURE] = linear,
+		.format[PSC_VOLTAGE_IN] = linear,
+		.format[PSC_CURRENT_OUT] = linear,
+
 		.func[0] = PMBUS_HAVE_VIN |
 		PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
 		PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
@@ -269,6 +299,8 @@ static const struct file_operations q54sj108a2_fops = {
 
 static const struct i2c_device_id q54sj108a2_id[] = {
 	{ "q54sj108a2", q54sj108a2 },
+	{ "q54sn120a1", q54sn120a1 },
+	{ "q54sw120a7", q54sw120a7 },
 	{ },
 };
 
@@ -278,6 +310,7 @@ static int q54sj108a2_probe(struct i2c_client *client)
 {
 	struct device *dev = &client->dev;
 	u8 buf[I2C_SMBUS_BLOCK_MAX + 1];
+	const struct i2c_device_id *mid;
 	enum chips chip_id;
 	int ret, i;
 	struct dentry *debugfs;
@@ -314,8 +347,12 @@ static int q54sj108a2_probe(struct i2c_client *client)
 		dev_err(dev, "Failed to read Manufacturer Model\n");
 		return ret;
 	}
-	if (ret != 14 || strncmp(buf, "Q54SJ108A2", 10)) {
-		buf[ret] = '\0';
+	buf[ret] = '\0';
+	for (mid = q54sj108a2_id; mid->name[0]; mid++) {
+		if (!strncasecmp(mid->name, buf, strlen(mid->name)))
+			break;
+	}
+	if (!mid->name[0]) {
 		dev_err(dev, "Unsupported Manufacturer Model '%s'\n", buf);
 		return -ENODEV;
 	}
@@ -325,7 +362,7 @@ static int q54sj108a2_probe(struct i2c_client *client)
 		dev_err(dev, "Failed to read Manufacturer Revision\n");
 		return ret;
 	}
-	if (ret != 4 || buf[0] != 'S') {
+	if (buf[0] != 'S') {
 		buf[ret] = '\0';
 		dev_err(dev, "Unsupported Manufacturer Revision '%s'\n", buf);
 		return -ENODEV;
@@ -402,6 +439,8 @@ static int q54sj108a2_probe(struct i2c_client *client)
 
 static const struct of_device_id q54sj108a2_of_match[] = {
 	{ .compatible = "delta,q54sj108a2", .data = (void *)q54sj108a2 },
+	{ .compatible = "delta,q54sn120a1", .data = (void *)q54sn120a1 },
+	{ .compatible = "delta,q54sw120a7", .data = (void *)q54sw120a7 },
 	{ },
 };
 

-- 
2.34.1