hwmon: (lm75) Add Atmel AT30TS74 support

commit c851b71 upstream.

Atmel (now Microchip) AT30TS74 is an LM75 compatible sensor. Add it.

Signed-off-by: Peter Rosin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>

Author: peda-r

drivers/hwmon/Kconfig

@@ -1222,6 +1222,7 @@ config SENSORS_LM75
 	  temperature sensor chip, with models including:
 
 		- Analog Devices ADT75
+		- Atmel (now Microchip) AT30TS74
 		- Dallas Semiconductor DS75, DS1775 and DS7505
 		- Global Mixed-mode Technology (GMT) G751
 		- Maxim MAX6625 and MAX6626

drivers/hwmon/lm75.c

@@ -26,6 +26,7 @@
 
 enum lm75_type {		/* keep sorted in alphabetical order */
 	adt75,
+	at30ts74,
 	ds1775,
 	ds75,
 	ds7505,
@@ -128,6 +129,14 @@ static const struct lm75_params device_params[] = {
 		.default_resolution = 12,
 		.default_sample_time = MSEC_PER_SEC / 10,
 	},
+	[at30ts74] = {
+		.set_mask = 3 << 5,	/* 12-bit mode*/
+		.default_resolution = 12,
+		.default_sample_time = 200,
+		.num_sample_times = 4,
+		.sample_times = (unsigned int []){ 25, 50, 100, 200 },
+		.resolutions = (u8 []) {9, 10, 11, 12 },
+	},
 	[ds1775] = {
 		.clr_mask = 3 << 5,
 		.set_mask = 2 << 5,	/* 11-bit mode */
@@ -645,6 +654,7 @@ static int lm75_probe(struct i2c_client *client)
 
 static const struct i2c_device_id lm75_ids[] = {
 	{ "adt75", adt75, },
+	{ "at30ts74", at30ts74, },
 	{ "ds1775", ds1775, },
 	{ "ds75", ds75, },
 	{ "ds7505", ds7505, },
@@ -680,6 +690,10 @@ static const struct of_device_id __maybe_unused lm75_of_match[] = {
 		.compatible = "adi,adt75",
 		.data = (void *)adt75
 	},
+	{
+		.compatible = "atmel,at30ts74",
+		.data = (void *)at30ts74
+	},
 	{
 		.compatible = "dallas,ds1775",
 		.data = (void *)ds1775