thermal: add sandbox driver

Provide a simple sandbox driver for the thermal uclass.
It simply registers and returns 100 degrees C if requested.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Reviewed-by: Simon Glass <sjg@chromium.org>

2 files changed, 37 insertions, 0 deletions

diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
index 15fe847d9f..8acc7d20cb 100644
--- a/drivers/thermal/Makefile
+++ b/drivers/thermal/Makefile
@@ -4,6 +4,7 @@
 # Author: Nitin Garg <nitin.garg@freescale.com>
 
 obj-$(CONFIG_DM_THERMAL) += thermal-uclass.o
+obj-$(CONFIG_SANDBOX) += thermal_sandbox.o
 obj-$(CONFIG_IMX_THERMAL) += imx_thermal.o
 obj-$(CONFIG_IMX_SCU_THERMAL) += imx_scu_thermal.o
 obj-$(CONFIG_TI_DRA7_THERMAL) += ti-bandgap.o
diff --git a/drivers/thermal/thermal_sandbox.c b/drivers/thermal/thermal_sandbox.c
new file mode 100644
index 0000000000..acc364feb0
--- /dev/null
+++ b/drivers/thermal/thermal_sandbox.c
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2022 Sartura Ltd.
+ * Written by Robert Marko <robert.marko@sartura.hr>
+ *
+ * Sandbox driver for the thermal uclass.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <thermal.h>
+
+int sandbox_thermal_get_temp(struct udevice *dev, int *temp)
+{
+	/* Simply return 100°C */
+	*temp = 100;
+
+	return 0;
+}
+
+static const struct dm_thermal_ops sandbox_thermal_ops = {
+	.get_temp = sandbox_thermal_get_temp,
+};
+
+static const struct udevice_id sandbox_thermal_ids[] = {
+	{ .compatible = "sandbox,thermal" },
+	{ }
+};
+
+U_BOOT_DRIVER(thermal_sandbox) = {
+	.name		= "thermal-sandbox",
+	.id		= UCLASS_THERMAL,
+	.of_match	= sandbox_thermal_ids,
+	.ops		= &sandbox_thermal_ops,
+	.flags		= DM_FLAG_PRE_RELOC,
+};