drivers/pvt: add mr75203 driver pm feature and correct temperature co…

…efficient Convert the register value to degrees centigrade temperature: T = G + H * (n / cal5 - 0.5) + J * F, for TH1520 G = 42740 H = 220000 J = -160 CAL5 = 4094 Signed-off-by: Xiangyi Zeng <[email protected]>
ruyisdk · May 24, 2024 · 32312c6 · 32312c6
1 parent f33967f
commit 32312c6
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diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
@@ -740,6 +740,10 @@
 			reg-names = "common", "ts", "pd", "vm";
 			clocks = <&aonsys_clk>;
 			#thermal-sensor-cells = <1>;
+			moortec,ts-coeff-h = <220000>;
+			moortec,ts-coeff-g = <42470>;
+			moortec,ts-coeff-j = <0xFFFFFF60>;		// -160
+			moortec,ts-coeff-cal5 = <4094>;
 		};
 
 		gpio@fffff52000 {

diff --git a/drivers/hwmon/mr75203.c b/drivers/hwmon/mr75203.c
@@ -910,6 +910,33 @@ static int mr75203_probe(struct platform_device *pdev)
 	return PTR_ERR_OR_ZERO(hwmon_dev);
 }
 
+#ifdef CONFIG_PM
+static int mr75203_suspend(struct device *dev)
+{
+	/* nothing to do */
+	return 0;
+}
+
+static int mr75203_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct pvt_device *pvt = platform_get_drvdata(pdev);
+	pvt_init(pvt);
+	return 0;
+}
+
+static const struct dev_pm_ops mr75203_dev_pm_ops = {
+	.suspend = mr75203_suspend,
+	.resume = mr75203_resume,
+};
+#define MR75203_DEV_PM_OPS (&mr75203_dev_pm_ops)
+
+#else
+
+#define MR75203_DEV_PM_OPS NULL
+
+#endif /* CONFIG_PM */
+
 static const struct of_device_id moortec_pvt_of_match[] = {
 	{ .compatible = "moortec,mr75203" },
 	{ }
@@ -919,6 +946,7 @@ MODULE_DEVICE_TABLE(of, moortec_pvt_of_match);
 static struct platform_driver moortec_pvt_driver = {
 	.driver = {
 		.name = "moortec-pvt",
+		.pm = MR75203_DEV_PM_OPS,
 		.of_match_table = moortec_pvt_of_match,
 	},
 	.probe = mr75203_probe,