hwmon: (lm75) add support for PCT2075

zonque · groeck · commit 557c7ffa2f28 · 2019-09-03T12:47:17.000-07:00
The NXP PCT2075 is largely compatible with other chips already supported by the LM75 driver. It uses an 11-bit resolution and defaults to 100 ms sampling period. The datasheet is here: https://www.nxp.com/docs/en/data-sheet/PCT2075.pdf Signed-off-by: Daniel Mack <daniel@zonque.org> Link: https://lore.kernel.org/r/20190711124504.7580-2-daniel@zonque.org [groeck: Documentation update] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
diff --git a/Documentation/hwmon/lm75.rst b/Documentation/hwmon/lm75.rst
@@ -119,16 +119,18 @@ Supported chips:
 
 	       http://www.ti.com/product/tmp275
 
-  * NXP LM75B
+  * NXP LM75B, PCT2075
 
-    Prefix: 'lm75b'
+    Prefix: 'lm75b', 'pct2075'
 
     Addresses scanned: none
 
     Datasheet: Publicly available at the NXP website
 
 	       http://www.nxp.com/documents/data_sheet/LM75B.pdf
 
+               http://www.nxp.com/docs/en/data-sheet/PCT2075.pdf
+
 Author: Frodo Looijaard <frodol@dds.nl>
 
 Description
diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
@@ -36,6 +36,7 @@ enum lm75_type {		/* keep sorted in alphabetical order */
 	max6626,
 	max31725,
 	mcp980x,
+	pct2075,
 	stds75,
 	stlm75,
 	tcn75,
@@ -317,6 +318,10 @@ lm75_probe(struct i2c_client *client, const struct i2c_device_id *id)
 		data->resolution = 9;
 		data->sample_time = MSEC_PER_SEC / 8;
 		break;
+	case pct2075:
+		data->resolution = 11;
+		data->sample_time = MSEC_PER_SEC / 10;
+		break;
 	case mcp980x:
 		data->resolution_limits = 9;
 		/* fall through */
@@ -397,6 +402,7 @@ static const struct i2c_device_id lm75_ids[] = {
 	{ "max31725", max31725, },
 	{ "max31726", max31725, },
 	{ "mcp980x", mcp980x, },
+	{ "pct2075", pct2075, },
 	{ "stds75", stds75, },
 	{ "stlm75", stlm75, },
 	{ "tcn75", tcn75, },
@@ -466,6 +472,10 @@ static const struct of_device_id __maybe_unused lm75_of_match[] = {
 		.compatible = "maxim,mcp980x",
 		.data = (void *)mcp980x
 	},
+	{
+		.compatible = "nxp,pct2075",
+		.data = (void *)pct2075
+	},
 	{
 		.compatible = "st,stds75",
 		.data = (void *)stds75
