thermistor: update Steinhart-Hart equations

Fix data table for:
 - 3v3 51.1K pull-up resistor divider with the 47K thermistor
 - 3v3 13.7K pull-up resistor divider with the 47K thermistor
 - 3v0 22.6K pull-up resistor divider with the 47K thermistor

Now they are using table based on manufacturer resistance table instead
of constant B parameter Steinhart-Hart equation.

BRANCH=none
BUG=b:184857072
TEST=makeall

Signed-off-by: Tomasz Michalec <tm@semihalf.com>
Change-Id: Ib1998c5e528731e4c2f00e0eb76a568eb4acba6e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2886887
Reviewed-by: Jett Rink <jettrink@chromium.org>

1 files changed, 37 insertions, 37 deletions

diff --git a/driver/temp_sensor/thermistor.c b/driver/temp_sensor/thermistor.c
index 550b2447c2..d895aa58f0 100644
--- a/driver/temp_sensor/thermistor.c
+++ b/driver/temp_sensor/thermistor.c
@@ -102,19 +102,19 @@ static int thermistor_get_temperature(int idx_adc, int *temp_ptr,
  */
 #define THERMISTOR_SCALING_FACTOR_51_47 11
 static const struct thermistor_data_pair thermistor_data_51_47[] = {
-	{ 2512 / THERMISTOR_SCALING_FACTOR_51_47, 0   },
-	{ 2158 / THERMISTOR_SCALING_FACTOR_51_47, 10  },
-	{ 1772 / THERMISTOR_SCALING_FACTOR_51_47, 20  },
-	{ 1398 / THERMISTOR_SCALING_FACTOR_51_47, 30  },
-	{ 1070 / THERMISTOR_SCALING_FACTOR_51_47, 40  },
-	{  803 / THERMISTOR_SCALING_FACTOR_51_47, 50  },
-	{  597 / THERMISTOR_SCALING_FACTOR_51_47, 60  },
-	{  443 / THERMISTOR_SCALING_FACTOR_51_47, 70  },
-	{  329 / THERMISTOR_SCALING_FACTOR_51_47, 80  },
-	{  285 / THERMISTOR_SCALING_FACTOR_51_47, 85  },
-	{  247 / THERMISTOR_SCALING_FACTOR_51_47, 90  },
-	{  214 / THERMISTOR_SCALING_FACTOR_51_47, 95  },
-	{  187 / THERMISTOR_SCALING_FACTOR_51_47, 100 },
+	{ 2484 / THERMISTOR_SCALING_FACTOR_51_47, 0   },
+	{ 2142 / THERMISTOR_SCALING_FACTOR_51_47, 10  },
+	{ 1767 / THERMISTOR_SCALING_FACTOR_51_47, 20  },
+	{ 1400 / THERMISTOR_SCALING_FACTOR_51_47, 30  },
+	{ 1072 / THERMISTOR_SCALING_FACTOR_51_47, 40  },
+	{  802 / THERMISTOR_SCALING_FACTOR_51_47, 50  },
+	{  593 / THERMISTOR_SCALING_FACTOR_51_47, 60  },
+	{  436 / THERMISTOR_SCALING_FACTOR_51_47, 70  },
+	{  321 / THERMISTOR_SCALING_FACTOR_51_47, 80  },
+	{  276 / THERMISTOR_SCALING_FACTOR_51_47, 85  },
+	{  237 / THERMISTOR_SCALING_FACTOR_51_47, 90  },
+	{  204 / THERMISTOR_SCALING_FACTOR_51_47, 95  },
+	{  177 / THERMISTOR_SCALING_FACTOR_51_47, 100 },
 };
 
 static const struct thermistor_info thermistor_info_51_47 = {
@@ -138,19 +138,19 @@ int get_temp_3v3_51k1_47k_4050b(int idx_adc, int *temp_ptr)
  */
 #define THERMISTOR_SCALING_FACTOR_13_47 13
 static const struct thermistor_data_pair thermistor_data_13_47[] = {
-	{ 3044 / THERMISTOR_SCALING_FACTOR_13_47, 0   },
-	{ 2890 / THERMISTOR_SCALING_FACTOR_13_47, 10  },
-	{ 2680 / THERMISTOR_SCALING_FACTOR_13_47, 20  },
-	{ 2418 / THERMISTOR_SCALING_FACTOR_13_47, 30  },
-	{ 2117 / THERMISTOR_SCALING_FACTOR_13_47, 40  },
-	{ 1800 / THERMISTOR_SCALING_FACTOR_13_47, 50  },
-	{ 1490 / THERMISTOR_SCALING_FACTOR_13_47, 60  },
-	{ 1208 / THERMISTOR_SCALING_FACTOR_13_47, 70  },
-	{  966 / THERMISTOR_SCALING_FACTOR_13_47, 80  },
-	{  860 / THERMISTOR_SCALING_FACTOR_13_47, 85  },
-	{  766 / THERMISTOR_SCALING_FACTOR_13_47, 90  },
-	{  679 / THERMISTOR_SCALING_FACTOR_13_47, 95  },
-	{  603 / THERMISTOR_SCALING_FACTOR_13_47, 100 },
+	{ 3033 / THERMISTOR_SCALING_FACTOR_13_47, 0   },
+	{ 2882 / THERMISTOR_SCALING_FACTOR_13_47, 10  },
+	{ 2677 / THERMISTOR_SCALING_FACTOR_13_47, 20  },
+	{ 2420 / THERMISTOR_SCALING_FACTOR_13_47, 30  },
+	{ 2119 / THERMISTOR_SCALING_FACTOR_13_47, 40  },
+	{ 1799 / THERMISTOR_SCALING_FACTOR_13_47, 50  },
+	{ 1485 / THERMISTOR_SCALING_FACTOR_13_47, 60  },
+	{ 1197 / THERMISTOR_SCALING_FACTOR_13_47, 70  },
+	{  947 / THERMISTOR_SCALING_FACTOR_13_47, 80  },
+	{  839 / THERMISTOR_SCALING_FACTOR_13_47, 85  },
+	{  741 / THERMISTOR_SCALING_FACTOR_13_47, 90  },
+	{  653 / THERMISTOR_SCALING_FACTOR_13_47, 95  },
+	{  576 / THERMISTOR_SCALING_FACTOR_13_47, 100 },
 };
 
 static const struct thermistor_info thermistor_info_13_47 = {
@@ -210,19 +210,19 @@ int get_temp_6v0_51k1_47k_4050b(int idx_adc, int *temp_ptr)
  */
 #define THERMISTOR_SCALING_FACTOR_22_47 11
 static const struct thermistor_data_pair thermistor_data_22_47[] = {
-	{ 2625 / THERMISTOR_SCALING_FACTOR_22_47, 0   },
-	{ 2425 / THERMISTOR_SCALING_FACTOR_22_47, 10  },
-	{ 2170 / THERMISTOR_SCALING_FACTOR_22_47, 20  },
+	{ 2619 / THERMISTOR_SCALING_FACTOR_22_47, 0   },
+	{ 2421 / THERMISTOR_SCALING_FACTOR_22_47, 10  },
+	{ 2168 / THERMISTOR_SCALING_FACTOR_22_47, 20  },
 	{ 1875 / THERMISTOR_SCALING_FACTOR_22_47, 30  },
 	{ 1563 / THERMISTOR_SCALING_FACTOR_22_47, 40  },
-	{ 1263 / THERMISTOR_SCALING_FACTOR_22_47, 50  },
-	{  995 / THERMISTOR_SCALING_FACTOR_22_47, 60  },
-	{  770 / THERMISTOR_SCALING_FACTOR_22_47, 70  },
-	{  589 / THERMISTOR_SCALING_FACTOR_22_47, 80  },
-	{  514 / THERMISTOR_SCALING_FACTOR_22_47, 85  },
+	{ 1262 / THERMISTOR_SCALING_FACTOR_22_47, 50  },
+	{  994 / THERMISTOR_SCALING_FACTOR_22_47, 60  },
+	{  769 / THERMISTOR_SCALING_FACTOR_22_47, 70  },
+	{  588 / THERMISTOR_SCALING_FACTOR_22_47, 80  },
+	{  513 / THERMISTOR_SCALING_FACTOR_22_47, 85  },
 	{  448 / THERMISTOR_SCALING_FACTOR_22_47, 90  },
-	{  391 / THERMISTOR_SCALING_FACTOR_22_47, 95  },
-	{  341 / THERMISTOR_SCALING_FACTOR_22_47, 100 },
+	{  390 / THERMISTOR_SCALING_FACTOR_22_47, 95  },
+	{  340 / THERMISTOR_SCALING_FACTOR_22_47, 100 },
 };
 
 static const struct thermistor_info thermistor_info_22_47 = {
@@ -241,7 +241,7 @@ int get_temp_3v0_22k6_47k_4050b(int idx_adc, int *temp_ptr)
 #ifdef CONFIG_STEINHART_HART_3V3_30K9_47K_4050B
 /*
  * Data derived from Steinhart-Hart equation in a resistor divider circuit with
- * Vdd=3000mV, R = 30.9Kohm, and thermistor (B = 4050, T0 = 298.15 K, nominal
+ * Vdd=3300mV, R = 30.9Kohm, and thermistor (B = 4050, T0 = 298.15 K, nominal
  * resistance (R0) = 47Kohm).
  */
 #define THERMISTOR_SCALING_FACTOR_31_47 11