hwmon: (lm75) Add support for TMP75C

The TMP75C has a different control register layout and only supports 12-bit temperature samples (0.0625 deg C). The continuous sample rate is ~12 Hz. Signed-off-by: Ben Gardner <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
iegor · Oct 14, 2015 · 9c32e81 · 9c32e81
1 parent 0b056b2
commit 9c32e81
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Showing 2 changed files with 10 additions and 2 deletions.
diff --git a/Documentation/hwmon/lm75 b/Documentation/hwmon/lm75
@@ -42,15 +42,16 @@ Supported chips:
     Addresses scanned: none
     Datasheet: Publicly available at the ST website
                http://www.st.com/internet/analog/product/121769.jsp
-  * Texas Instruments TMP100, TMP101, TMP105, TMP112, TMP75, TMP175, TMP275
-    Prefixes: 'tmp100', 'tmp101', 'tmp105', 'tmp112', 'tmp175', 'tmp75', 'tmp275'
+  * Texas Instruments TMP100, TMP101, TMP105, TMP112, TMP75, TMP75C, TMP175, TMP275
+    Prefixes: 'tmp100', 'tmp101', 'tmp105', 'tmp112', 'tmp175', 'tmp75', 'tmp75c', 'tmp275'
     Addresses scanned: none
     Datasheet: Publicly available at the Texas Instruments website
                http://www.ti.com/product/tmp100
                http://www.ti.com/product/tmp101
                http://www.ti.com/product/tmp105
                http://www.ti.com/product/tmp112
                http://www.ti.com/product/tmp75
+               http://www.ti.com/product/tmp75c
                http://www.ti.com/product/tmp175
                http://www.ti.com/product/tmp275
   * NXP LM75B

diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
@@ -57,6 +57,7 @@ enum lm75_type {		/* keep sorted in alphabetical order */
 	tmp175,
 	tmp275,
 	tmp75,
+	tmp75c,
 };
 
 /* Addresses scanned */
@@ -280,6 +281,11 @@ lm75_probe(struct i2c_client *client, const struct i2c_device_id *id)
 		data->resolution = 12;
 		data->sample_time = HZ / 2;
 		break;
+	case tmp75c:
+		clr_mask |= 1 << 5;		/* not one-shot mode */
+		data->resolution = 12;
+		data->sample_time = HZ / 4;
+		break;
 	}
 
 	/* configure as specified */
@@ -343,6 +349,7 @@ static const struct i2c_device_id lm75_ids[] = {
 	{ "tmp175", tmp175, },
 	{ "tmp275", tmp275, },
 	{ "tmp75", tmp75, },
+	{ "tmp75c", tmp75c, },
 	{ /* LIST END */ }
 };
 MODULE_DEVICE_TABLE(i2c, lm75_ids);