hwmon: (ntc_thermistor): add support for B57891S0103 from Epcos

More of the same... Signed-off-by: Peter Rosin <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
jangid · Dec 16, 2018 · e8fda2c · e8fda2c
1 parent e1fd3be
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Showing 3 changed files with 58 additions and 3 deletions.
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
@@ -1218,7 +1218,8 @@ config SENSORS_NTC_THERMISTOR
 
 	  Currently, this driver supports
 	  NCP15WB473, NCP18WB473, NCP21WB473, NCP03WB473, NCP15WL333,
-	  NCP03WF104 and NCP15XH103 from Murata and B57330V2103 from EPCOS.
+	  NCP03WF104 and NCP15XH103 from Murata and B57330V2103 and
+	  B57891S0103 from EPCOS.
 
 	  This driver can also be built as a module. If so, the module
 	  will be called ntc-thermistor.

diff --git a/drivers/hwmon/ntc_thermistor.c b/drivers/hwmon/ntc_thermistor.c
@@ -55,6 +55,7 @@ static const struct platform_device_id ntc_thermistor_id[] = {
 	{ "b57330v2103", TYPE_B57330V2103},
 	{ "ncp03wf104", TYPE_NCPXXWF104 },
 	{ "ncp15xh103", TYPE_NCPXXXH103 },
+	{ "b57891s0103", TYPE_B57891S0103 },
 	{ },
 };
 
@@ -212,8 +213,8 @@ static const struct ntc_compensation ncpXXxh103[] = {
 };
 
 /*
- * The following compensation table is from the specification of EPCOS NTC
- * Thermistors Datasheet
+ * The following compensation tables are from the specifications in EPCOS NTC
+ * Thermistors Datasheets
  */
 static const struct ntc_compensation b57330v2103[] = {
 	{ .temp_c	= -40, .ohm	= 190030 },
@@ -252,6 +253,52 @@ static const struct ntc_compensation b57330v2103[] = {
 	{ .temp_c	= 125, .ohm	= 531 },
 };
 
+static const struct ntc_compensation b57891s0103[] = {
+	{ .temp_c	= -55.0, .ohm	= 878900 },
+	{ .temp_c	= -50.0, .ohm	= 617590 },
+	{ .temp_c	= -45.0, .ohm	= 439340 },
+	{ .temp_c	= -40.0, .ohm	= 316180 },
+	{ .temp_c	= -35.0, .ohm	= 230060 },
+	{ .temp_c	= -30.0, .ohm	= 169150 },
+	{ .temp_c	= -25.0, .ohm	= 125550 },
+	{ .temp_c	= -20.0, .ohm	= 94143 },
+	{ .temp_c	= -15.0, .ohm	= 71172 },
+	{ .temp_c	= -10.0, .ohm	= 54308 },
+	{ .temp_c	= -5.0, .ohm	= 41505 },
+	{ .temp_c	= 0.0, .ohm	= 32014 },
+	{ .temp_c	= 5.0, .ohm	= 25011 },
+	{ .temp_c	= 10.0, .ohm	= 19691 },
+	{ .temp_c	= 15.0, .ohm	= 15618 },
+	{ .temp_c	= 20.0, .ohm	= 12474 },
+	{ .temp_c	= 25.0, .ohm	= 10000 },
+	{ .temp_c	= 30.0, .ohm	= 8080 },
+	{ .temp_c	= 35.0, .ohm	= 6569 },
+	{ .temp_c	= 40.0, .ohm	= 5372 },
+	{ .temp_c	= 45.0, .ohm	= 4424 },
+	{ .temp_c	= 50.0, .ohm	= 3661 },
+	{ .temp_c	= 55.0, .ohm	= 3039 },
+	{ .temp_c	= 60.0, .ohm	= 2536 },
+	{ .temp_c	= 65.0, .ohm	= 2128 },
+	{ .temp_c	= 70.0, .ohm	= 1794 },
+	{ .temp_c	= 75.0, .ohm	= 1518 },
+	{ .temp_c	= 80.0, .ohm	= 1290 },
+	{ .temp_c	= 85.0, .ohm	= 1100 },
+	{ .temp_c	= 90.0, .ohm	= 942 },
+	{ .temp_c	= 95.0, .ohm	= 809 },
+	{ .temp_c	= 100.0, .ohm	= 697 },
+	{ .temp_c	= 105.0, .ohm	= 604 },
+	{ .temp_c	= 110.0, .ohm	= 525 },
+	{ .temp_c	= 115.0, .ohm	= 457 },
+	{ .temp_c	= 120.0, .ohm	= 400 },
+	{ .temp_c	= 125.0, .ohm	= 351 },
+	{ .temp_c	= 130.0, .ohm	= 308 },
+	{ .temp_c	= 135.0, .ohm	= 272 },
+	{ .temp_c	= 140.0, .ohm	= 240 },
+	{ .temp_c	= 145.0, .ohm	= 213 },
+	{ .temp_c	= 150.0, .ohm	= 189 },
+	{ .temp_c	= 155.0, .ohm	= 168 },
+};
+
 struct ntc_data {
 	struct ntc_thermistor_platform_data *pdata;
 	const struct ntc_compensation *comp;
@@ -296,6 +343,8 @@ static const struct of_device_id ntc_match[] = {
 		.data = &ntc_thermistor_id[6] },
 	{ .compatible = "murata,ncp15xh103",
 		.data = &ntc_thermistor_id[7] },
+	{ .compatible = "epcos,b57891s0103",
+		.data = &ntc_thermistor_id[8] },
 
 	/* Usage of vendor name "ntc" is deprecated */
 	{ .compatible = "ntc,ncp15wb473",
@@ -627,6 +676,10 @@ static int ntc_thermistor_probe(struct platform_device *pdev)
 		data->comp = ncpXXxh103;
 		data->n_comp = ARRAY_SIZE(ncpXXxh103);
 		break;
+	case TYPE_B57891S0103:
+		data->comp = b57891s0103;
+		data->n_comp = ARRAY_SIZE(b57891s0103);
+		break;
 	default:
 		dev_err(dev, "Unknown device type: %lu(%s)\n",
 				pdev_id->driver_data, pdev_id->name);

diff --git a/include/linux/platform_data/ntc_thermistor.h b/include/linux/platform_data/ntc_thermistor.h
@@ -29,6 +29,7 @@ enum ntc_thermistor_type {
 	TYPE_B57330V2103,
 	TYPE_NCPXXWF104,
 	TYPE_NCPXXXH103,
+	TYPE_B57891S0103,
 };
 
 struct ntc_thermistor_platform_data {