test: Add tests for CPU uclass

Add a sandbox CPU driver, and some tests for the CPU uclass.

Signed-off-by: Mario Six <mario.six@gdsys.cc>

arch/sandbox/dts/test.dts

@@ -297,6 +297,18 @@
 		mbox-names = "other", "test";
 	};
 
+	cpu-test1 {
+		compatible = "sandbox,cpu_sandbox";
+	};
+
+	cpu-test2 {
+		compatible = "sandbox,cpu_sandbox";
+	};
+
+	cpu-test3 {
+		compatible = "sandbox,cpu_sandbox";
+	};
+
 	misc-test {
 		compatible = "sandbox,misc_sandbox";
 	};

drivers/cpu/Makefile

@@ -7,3 +7,4 @@
 obj-$(CONFIG_CPU) += cpu-uclass.o
 
 obj-$(CONFIG_ARCH_BMIPS) += bmips_cpu.o
+obj-$(CONFIG_SANDBOX) += cpu_sandbox.o

drivers/cpu/cpu_sandbox.c

@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2018
+ * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <cpu.h>
+
+int cpu_sandbox_get_desc(struct udevice *dev, char *buf, int size)
+{
+	snprintf(buf, size, "LEG Inc. SuperMegaUltraTurbo CPU No. 1");
+
+	return 0;
+}
+
+int cpu_sandbox_get_info(struct udevice *dev, struct cpu_info *info)
+{
+	info->cpu_freq = 42 * 42 * 42 * 42 * 42;
+	info->features = 0x42424242;
+
+	return 0;
+}
+
+int cpu_sandbox_get_count(struct udevice *dev)
+{
+	return 42;
+}
+
+int cpu_sandbox_get_vendor(struct udevice *dev, char *buf, int size)
+{
+	snprintf(buf, size, "Languid Example Garbage Inc.");
+
+	return 0;
+}
+
+static const struct cpu_ops cpu_sandbox_ops = {
+	.get_desc = cpu_sandbox_get_desc,
+	.get_info = cpu_sandbox_get_info,
+	.get_count = cpu_sandbox_get_count,
+	.get_vendor = cpu_sandbox_get_vendor,
+};
+
+int cpu_sandbox_probe(struct udevice *dev)
+{
+	return 0;
+}
+
+static const struct udevice_id cpu_sandbox_ids[] = {
+	{ .compatible = "sandbox,cpu_sandbox" },
+	{ }
+};
+
+U_BOOT_DRIVER(cpu_sandbox) = {
+	.name           = "cpu_sandbox",
+	.id             = UCLASS_CPU,
+	.ops		= &cpu_sandbox_ops,
+	.of_match       = cpu_sandbox_ids,
+	.probe          = cpu_sandbox_probe,
+};

test/dm/Makefile

@@ -47,4 +47,5 @@ obj-$(CONFIG_WDT) += wdt.o
 obj-$(CONFIG_AXI) += axi.o
 obj-$(CONFIG_MISC) += misc.o
 obj-$(CONFIG_DM_SERIAL) += serial.o
+obj-$(CONFIG_CPU) += cpu.o
 endif

test/dm/cpu.c

@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2018
+ * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/test.h>
+#include <dm/uclass-internal.h>
+#include <cpu.h>
+#include <test/ut.h>
+
+static int dm_test_cpu(struct unit_test_state *uts)
+{
+	struct udevice *dev;
+	char text[128];
+	struct cpu_info info;
+
+	ut_assertok(cpu_probe_all());
+
+	/* Check that cpu_probe_all really activated all CPUs */
+	for (uclass_find_first_device(UCLASS_CPU, &dev);
+	     dev;
+	     uclass_find_next_device(&dev))
+		ut_assert(dev->flags & DM_FLAG_ACTIVATED);
+
+	ut_assertok(uclass_get_device_by_name(UCLASS_CPU, "cpu-test1", &dev));
+
+	ut_assertok(cpu_get_desc(dev, text, sizeof(text)));
+	ut_assertok(strcmp(text, "LEG Inc. SuperMegaUltraTurbo CPU No. 1"));
+
+	ut_assertok(cpu_get_info(dev, &info));
+	ut_asserteq(info.cpu_freq, 42 * 42 * 42 * 42 * 42);
+	ut_asserteq(info.features, 0x42424242);
+
+	ut_asserteq(cpu_get_count(dev), 42);
+
+	ut_assertok(cpu_get_vendor(dev, text, sizeof(text)));
+	ut_assertok(strcmp(text, "Languid Example Garbage Inc."));
+
+	return 0;
+}
+
+DM_TEST(dm_test_cpu, DM_TESTF_SCAN_FDT);