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>

arch/sandbox/dts/sandbox.dtsi

@@ -443,6 +443,10 @@
 	sandbox_tee {
 		compatible = "sandbox,tee";
 	};
+
+	thermal {
+		compatible = "sandbox,thermal";
+	};
 };
 
 &cros_ec {

arch/sandbox/dts/test.dts

@@ -1694,6 +1694,10 @@
 			compatible = "sandbox,regmap_test";
 		};
 	};
+
+	thermal {
+		compatible = "sandbox,thermal";
+	};
 };
 
 #include "sandbox_pmic.dtsi"

configs/sandbox_defconfig

@@ -79,6 +79,7 @@ CONFIG_CMD_PCI=y
 CONFIG_CMD_READ=y
 CONFIG_CMD_REMOTEPROC=y
 CONFIG_CMD_SPI=y
+CONFIG_CMD_TEMPERATURE=y
 CONFIG_CMD_USB=y
 CONFIG_CMD_AXI=y
 CONFIG_CMD_SETEXPR_FMT=y
@@ -281,6 +282,7 @@ CONFIG_SYSINFO=y
 CONFIG_SYSINFO_SANDBOX=y
 CONFIG_SYSINFO_GPIO=y
 CONFIG_SYSRESET=y
+CONFIG_DM_THERMAL=y
 CONFIG_TIMER=y
 CONFIG_TIMER_EARLY=y
 CONFIG_SANDBOX_TIMER=y

configs/sandbox_flattree_defconfig

@@ -45,6 +45,7 @@ CONFIG_CMD_OSD=y
 CONFIG_CMD_PCI=y
 CONFIG_CMD_REMOTEPROC=y
 CONFIG_CMD_SPI=y
+CONFIG_CMD_TEMPERATURE=y
 CONFIG_CMD_USB=y
 CONFIG_BOOTP_DNS2=y
 CONFIG_CMD_TFTPPUT=y
@@ -186,6 +187,7 @@ CONFIG_SYSINFO=y
 CONFIG_SYSINFO_SANDBOX=y
 CONFIG_SYSINFO_GPIO=y
 CONFIG_SYSRESET=y
+CONFIG_DM_THERMAL=y
 CONFIG_TIMER=y
 CONFIG_TIMER_EARLY=y
 CONFIG_SANDBOX_TIMER=y

configs/sandbox_noinst_defconfig

@@ -62,6 +62,7 @@ CONFIG_CMD_OSD=y
 CONFIG_CMD_PCI=y
 CONFIG_CMD_REMOTEPROC=y
 CONFIG_CMD_SPI=y
+CONFIG_CMD_TEMPERATURE=y
 CONFIG_CMD_USB=y
 CONFIG_BOOTP_DNS2=y
 CONFIG_CMD_TFTPPUT=y
@@ -213,6 +214,7 @@ CONFIG_SYSINFO_SANDBOX=y
 CONFIG_SYSINFO_GPIO=y
 CONFIG_SYSRESET=y
 CONFIG_SPL_SYSRESET=y
+CONFIG_DM_THERMAL=y
 CONFIG_TIMER=y
 CONFIG_TIMER_EARLY=y
 CONFIG_SANDBOX_TIMER=y

configs/sandbox_spl_defconfig

@@ -62,6 +62,7 @@ CONFIG_CMD_OSD=y
 CONFIG_CMD_PCI=y
 CONFIG_CMD_REMOTEPROC=y
 CONFIG_CMD_SPI=y
+CONFIG_CMD_TEMPERATURE=y
 CONFIG_CMD_USB=y
 CONFIG_BOOTP_DNS2=y
 CONFIG_CMD_TFTPPUT=y
@@ -216,6 +217,7 @@ CONFIG_SYSINFO_SANDBOX=y
 CONFIG_SYSINFO_GPIO=y
 CONFIG_SYSRESET=y
 CONFIG_SPL_SYSRESET=y
+CONFIG_DM_THERMAL=y
 CONFIG_TIMER=y
 CONFIG_TIMER_EARLY=y
 CONFIG_SANDBOX_TIMER=y

configs/sandbox_vpl_defconfig

@@ -74,6 +74,7 @@ CONFIG_CMD_OSD=y
 CONFIG_CMD_PCI=y
 CONFIG_CMD_REMOTEPROC=y
 CONFIG_CMD_SPI=y
+CONFIG_CMD_TEMPERATURE=y
 CONFIG_CMD_USB=y
 CONFIG_BOOTP_DNS2=y
 CONFIG_CMD_TFTPPUT=y
@@ -223,6 +224,7 @@ CONFIG_SYSINFO_GPIO=y
 CONFIG_SYSRESET=y
 CONFIG_SPL_SYSRESET=y
 CONFIG_TPL_SYSRESET=y
+CONFIG_DM_THERMAL=y
 CONFIG_TIMER=y
 CONFIG_TIMER_EARLY=y
 CONFIG_SANDBOX_TIMER=y

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

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,
+};