zephyr: drivers: thermistors are device tree nodes

Thermistor drivers now query the device tree for configuration.
Thermistor tests have been updated to be parameterized
on all thermistors enabled in the device tree.

BRANCH=none
BUG=b:184374937
TEST= 1) zmake testall
      2) make runhosttests

Cq-Depend: chromium:3161332
Signed-off-by: Aaron Massey <aaronmassey@chromium.org>
Change-Id: Ic5330cd5c33e79e192428ca857651de9a225856e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3133812
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Tested-by: Aaron Massey <aaronmassey@google.com>
Commit-Queue: Aaron Massey <aaronmassey@google.com>

1 files changed, 308 insertions, 0 deletions

diff --git a/zephyr/include/cros/thermistor/thermistor.dtsi b/zephyr/include/cros/thermistor/thermistor.dtsi
new file mode 100644
index 0000000000..033d5639e2
--- /dev/null
+++ b/zephyr/include/cros/thermistor/thermistor.dtsi
@@ -0,0 +1,308 @@
+/ {
+	thermistor_3V3_30K9_47K_4050B: thermistor-3V3-30K9-47K-4050B {
+		status = "disabled";
+		compatible = "cros-ec,thermistor";
+		scaling-factor = <11>;
+		num-pairs = <10>;
+		steinhart-reference-mv = <3300>;
+		steinhart-reference-res = <30900>;
+
+		/*
+		 * Data derived from Steinhart-Hart equation in a resistor
+		 * divider circuit with Vdd=3300mV, R = 30.9Kohm, and thermistor
+		 * (B = 4050, T0 = 298.15 K, nominal resistance (R0) = 47Kohm).
+		 */
+		sample-datum-0 {
+			milivolt = <(2753 / 11)>;
+			temp = <0>;
+			sample-index = <0>;
+		};
+		sample-datum-1 {
+			milivolt = <(2487 / 11)>;
+			temp = <10>;
+			sample-index = <1>;
+		};
+		sample-datum-2 {
+			milivolt = <(2165 / 11)>;
+			temp = <20>;
+			sample-index = <2>;
+		};
+		sample-datum-3 {
+			milivolt = <(1813 / 11)>;
+			temp = <30>;
+			sample-index = <3>;
+		};
+		sample-datum-4 {
+			milivolt = <(1145 / 11)>;
+			temp = <50>;
+			sample-index = <4>;
+		};
+		sample-datum-5 {
+			milivolt = <(878 / 11)>;
+			temp = <60>;
+			sample-index = <5>;
+		};
+		sample-datum-6 {
+			milivolt = <(665 / 11)>;
+			temp = <70>;
+			sample-index = <6>;
+		};
+		sample-datum-7 {
+			milivolt = <(500 / 11)>;
+			temp = <80>;
+			sample-index = <7>;
+		};
+		sample-datum-8 {
+			milivolt = <(375 / 11)>;
+			temp = <90>;
+			sample-index = <8>;
+		};
+		sample-datum-9 {
+			milivolt = <(282 / 11)>;
+			temp = <100>;
+			sample-index = <9>;
+		};
+	};
+
+
+	thermistor_3V0_22K6_47K_4050B: thermistor-3V0-22K6-47K-4050B {
+		status = "disabled";
+		compatible = "cros-ec,thermistor";
+		scaling-factor = <11>;
+		num-pairs = <13>;
+		steinhart-reference-mv = <3000>;
+		steinhart-reference-res = <22600>;
+
+		/*
+		 * Data derived from Steinhart-Hart equation in a resistor
+		 * divider circuit with Vdd=3000mV, R = 22.6Kohm, and thermistor
+		 * (B = 4050, T0 = 298.15 K, nominal resistance (R0) = 47Kohm).
+		 */
+		sample-datum-0 {
+			milivolt = <( 2619 / 11)>;
+			temp = <0>;
+			sample-index = <0>;
+		};
+		sample-datum-1 {
+			milivolt = <( 2421 / 11)>;
+			temp = <10>;
+			sample-index = <1>;
+		};
+		sample-datum-2 {
+			milivolt = <( 2168 / 11)>;
+			temp = <20>;
+			sample-index = <2>;
+		};
+		sample-datum-3 {
+			milivolt = <( 1875 / 11)>;
+			temp = <30>;
+			sample-index = <3>;
+		};
+		sample-datum-4 {
+			milivolt = <( 1563 / 11)>;
+			temp = <40>;
+			sample-index = <4>;
+		};
+		sample-datum-5 {
+			milivolt = <( 1262 / 11)>;
+			temp = <50>;
+			sample-index = <5>;
+		};
+		sample-datum-6 {
+			milivolt = <(  994 / 11)>;
+			temp = <60>;
+			sample-index = <6>;
+		};
+		sample-datum-7 {
+			milivolt = <(  769 / 11)>;
+			temp = <70>;
+			sample-index = <7>;
+		};
+		sample-datum-8 {
+			milivolt = <(  588 / 11)>;
+			temp = <80>;
+			sample-index = <8>;
+		};
+		sample-datum-9 {
+			milivolt = <(  513 / 11)>;
+			temp = <85>;
+			sample-index = <9>;
+		};
+		sample-datum-10 {
+			milivolt = <(  448 / 11)>;
+			temp = <90>;
+			sample-index = <10>;
+		};
+		sample-datum-11 {
+			milivolt = <(  390 / 11)>;
+			temp = <95>;
+			sample-index = <11>;
+		};
+		sample-datum-12 {
+			milivolt = <(  340 / 11)>;
+			temp = <100>;
+			sample-index = <12>;
+		};
+	};
+
+	thermistor_3V3_13K7_47K_4050B: thermistor-3V3-13K7-47K-4050B {
+		status = "disabled";
+		compatible = "cros-ec,thermistor";
+		scaling-factor = <13>;
+		num-pairs = <13>;
+		steinhart-reference-mv = <3300>;
+		steinhart-reference-res = <13700>;
+
+		/*
+		 * Data derived from Steinhart-Hart equation in a resistor
+		 * divider circuit with Vdd=3300mV, R = 13.7Kohm, and thermistor
+		 * (B = 4050, T0 = 298.15 K, nominal resistance (R0) = 47Kohm).
+		 */
+		sample-datum-0 {
+			milivolt = <(3033 / 13)>;
+			temp = <0>;
+			sample-index = <0>;
+		};
+		sample-datum-1 {
+			milivolt = <(2882 / 13)>;
+			temp = <10>;
+			sample-index = <1>;
+		};
+		sample-datum-2 {
+			milivolt = <(2677 / 13)>;
+			temp = <20>;
+			sample-index = <2>;
+		};
+		sample-datum-3 {
+			milivolt = <(2420 / 13)>;
+			temp = <30>;
+			sample-index = <3>;
+		};
+		sample-datum-4 {
+			milivolt = <(2119 / 13)>;
+			temp = <40>;
+			sample-index = <4>;
+		};
+		sample-datum-5 {
+			milivolt = <(1799 / 13)>;
+			temp = <50>;
+			sample-index = <5>;
+		};
+		sample-datum-6 {
+			milivolt = <(1485 / 13)>;
+			temp = <60>;
+			sample-index = <6>;
+		};
+		sample-datum-7 {
+			milivolt = <(1197 / 13)>;
+			temp = <70>;
+			sample-index = <7>;
+		};
+		sample-datum-8 {
+			milivolt = <( 947 / 13)>;
+			temp = <80>;
+			sample-index = <8>;
+		};
+		sample-datum-9 {
+			milivolt = <( 839 / 13)>;
+			temp = <85>;
+			sample-index = <9>;
+		};
+		sample-datum-10 {
+			milivolt = <( 741 / 13)>;
+			temp = <90>;
+			sample-index = <10>;
+		};
+		sample-datum-11 {
+			milivolt = <( 653 / 13)>;
+			temp = <95>;
+			sample-index = <11>;
+		};
+		sample-datum-12 {
+			milivolt = <( 576 / 13)>;
+			temp = <100>;
+			sample-index = <12>;
+		};
+	};
+
+
+	thermistor_3V3_51K1_47K_4050B: thermistor-3V3-51K1-47K-4050B {
+		status = "disabled";
+		compatible = "cros-ec,thermistor";
+		scaling-factor = <11>;
+		num-pairs = <13>;
+		steinhart-reference-mv = <3300>;
+		steinhart-reference-res = <51100>;
+
+		/*
+		 * Data derived from Steinhart-Hart equation in a resistor
+		 * divider circuit with Vdd=3300mV, R = 51.1Kohm, and thermistor
+		 * (B = 4050, T0 = 298.15 K, nominal resistance (R0) = 47Kohm).
+		 */
+		sample-datum-0 {
+			milivolt = <(2484 / 11)>;
+			temp = <0>;
+			sample-index = <0>;
+		};
+		sample-datum-1 {
+			milivolt = <(2142 / 11)>;
+			temp = <10>;
+			sample-index = <1>;
+		};
+		sample-datum-2 {
+			milivolt = <(1767 / 11)>;
+			temp = <20>;
+			sample-index = <2>;
+		};
+		sample-datum-3 {
+			milivolt = <(1400 / 11)>;
+			temp = <30>;
+			sample-index = <3>;
+		};
+		sample-datum-4 {
+			milivolt = <(1072 / 11)>;
+			temp = <40>;
+			sample-index = <4>;
+		};
+		sample-datum-5 {
+			milivolt = <( 802 / 11)>;
+			temp = <50>;
+			sample-index = <5>;
+		};
+		sample-datum-6 {
+			milivolt = <( 593 / 11)>;
+			temp = <60>;
+			sample-index = <6>;
+		};
+		sample-datum-7 {
+			milivolt = <( 436 / 11)>;
+			temp = <70>;
+			sample-index = <7>;
+		};
+		sample-datum-8 {
+			milivolt = <( 321 / 11)>;
+			temp = <80>;
+			sample-index = <8>;
+		};
+		sample-datum-9 {
+			milivolt = <( 276 / 11)>;
+			temp = <85>;
+			sample-index = <9>;
+		};
+		sample-datum-10 {
+			milivolt = <( 237 / 11)>;
+			temp = <90>;
+			sample-index = <10>;
+		};
+		sample-datum-11 {
+			milivolt = <( 204 / 11)>;
+			temp = <95>;
+			sample-index = <11>;
+		};
+		sample-datum-12 {
+			milivolt = <( 177 / 11)>;
+			temp = <100>;
+			sample-index = <12>;
+		};
+	};
+};