linux-kernel - [PATCH 2/2] hwmon: (lm75) Add NXP P3T1750 support

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Message-Id: <20250725095811.2717763-2-lakshay.piplani@nxp.com>
Date: Fri, 25 Jul 2025 15:28:11 +0530
From: Lakshay Piplani <lakshay.piplani@....com>
To: linux-kernel@...r.kernel.org,
	jdelvare@...e.com,
	linux@...ck-us.net,
	linux-hwmon@...r.kernel.org,
	corbet@....net,
	linux-doc@...r.kernel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	devicetree@...r.kernel.org
Cc: vikash.bansal@....com,
	priyanka.jain@....com,
	shashank.rebbapragada@....com,
	Lakshay Piplani <lakshay.piplani@....com>
Subject: [PATCH 2/2] hwmon: (lm75) Add NXP P3T1750 support

Add support for lm75 compatible NXP P3T1750
temperature sensor.

Signed-off-by: Lakshay Piplani <lakshay.piplani@....com>
---
 Documentation/hwmon/lm75.rst |  6 ++++--
 drivers/hwmon/lm75.c         | 13 +++++++++++++
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/Documentation/hwmon/lm75.rst b/Documentation/hwmon/lm75.rst
index c6a54bbca3c5..84e690824fee 100644
--- a/Documentation/hwmon/lm75.rst
+++ b/Documentation/hwmon/lm75.rst
@@ -121,9 +121,9 @@ Supported chips:
 
          https://www.ti.com/product/TMP1075
 
-  * NXP LM75B, P3T1755, PCT2075
+  * NXP LM75B, P3T1755, PCT2075, 'P3T1750'
 
-    Prefix: 'lm75b', 'p3t1755', 'pct2075'
+    Prefix: 'lm75b', 'p3t1755', 'pct2075', 'p3t1750'
 
     Addresses scanned: none
 
@@ -135,6 +135,8 @@ Supported chips:
 
                https://www.nxp.com/docs/en/data-sheet/PCT2075.pdf
 
+               https://www.nxp.com/docs/en/data-sheet/P3T1750DP.pdf
+
   * AMS OSRAM AS6200
 
     Prefix: 'as6200'
diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
index 9b4875e2fd8d..979057f02748 100644
--- a/drivers/hwmon/lm75.c
+++ b/drivers/hwmon/lm75.c
@@ -40,6 +40,7 @@ enum lm75_type {		/* keep sorted in alphabetical order */
 	max31725,
 	mcp980x,
 	p3t1755,
+	p3t1750,
 	pct2075,
 	stds75,
 	stlm75,
@@ -229,6 +230,13 @@ static const struct lm75_params device_params[] = {
 		.num_sample_times = 4,
 		.sample_times = (unsigned int []){ 28, 55, 110, 220 },
 	},
+	[p3t1750] = {
+		.clr_mask = 1 << 1 | 1 << 7,	/* disable SMBAlert and one-shot */
+		.default_resolution = 12,
+		.default_sample_time = 55,
+		.num_sample_times = 4,
+		.sample_times = (unsigned int []){ 28, 55, 110, 220 },
+	},
 	[pct2075] = {
 		.default_resolution = 11,
 		.default_sample_time = MSEC_PER_SEC / 10,
@@ -806,6 +814,7 @@ static const struct i2c_device_id lm75_i2c_ids[] = {
 	{ "max31726", max31725, },
 	{ "mcp980x", mcp980x, },
 	{ "p3t1755", p3t1755, },
+	{ "p3t1750", p3t1750, },
 	{ "pct2075", pct2075, },
 	{ "stds75", stds75, },
 	{ "stlm75", stlm75, },
@@ -920,6 +929,10 @@ static const struct of_device_id __maybe_unused lm75_of_match[] = {
 		.compatible = "nxp,p3t1755",
 		.data = (void *)p3t1755
 	},
+	{
+		.compatible = "nxp,p3t1750",
+		.data = (void *)p3t1750
+	},
 	{
 		.compatible = "nxp,pct2075",
 		.data = (void *)pct2075
-- 
2.25.1