test: Add a test for regmap

We use syscon to test that the regmap functions work as expected.

Signed-off-by: Simon Glass <sjg@chromium.org>

test/dm/Makefile

@@ -23,6 +23,7 @@ obj-$(CONFIG_LED) += led.o
 obj-$(CONFIG_DM_MMC) += mmc.o
 obj-$(CONFIG_DM_PCI) += pci.o
 obj-$(CONFIG_RAM) += ram.o
+obj-y += regmap.o
 obj-$(CONFIG_RESET) += reset.o
 obj-$(CONFIG_DM_RTC) += rtc.o
 obj-$(CONFIG_DM_SPI_FLASH) += sf.o

test/dm/regmap.c

@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2015 Google, Inc
+2 *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <mapmem.h>
+#include <regmap.h>
+#include <syscon.h>
+#include <asm/test.h>
+#include <dm/test.h>
+#include <test/ut.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Base test of register maps */
+static int dm_test_regmap_base(struct unit_test_state *uts)
+{
+	struct udevice *dev;
+	struct regmap *map;
+	int i;
+
+	ut_assertok(uclass_get_device(UCLASS_SYSCON, 0, &dev));
+	map = syscon_get_regmap(dev);
+	ut_assertok_ptr(map);
+	ut_asserteq(1, map->range_count);
+	ut_asserteq(0x10, map->base);
+	ut_asserteq(0x10, map->range->start);
+	ut_asserteq(4, map->range->size);
+	ut_asserteq_ptr(&map->base_range, map->range);
+	ut_asserteq(0x10, map_to_sysmem(regmap_get_range(map, 0)));
+
+	ut_assertok(uclass_get_device(UCLASS_SYSCON, 1, &dev));
+	map = syscon_get_regmap(dev);
+	ut_assertok_ptr(map);
+	ut_asserteq(4, map->range_count);
+	ut_asserteq(0x20, map->base);
+	ut_assert(&map->base_range != map->range);
+	for (i = 0; i < 4; i++) {
+		const unsigned long addr = 0x20 + 8 * i;
+
+		ut_asserteq(addr, map->range[i].start);
+		ut_asserteq(5 + i, map->range[i].size);
+		ut_asserteq(addr, map_to_sysmem(regmap_get_range(map, i)));
+	}
+
+	/* Check that we can't pretend a different device is a syscon */
+	ut_assertok(uclass_get_device(UCLASS_I2C, 0, &dev));
+	map = syscon_get_regmap(dev);
+	ut_asserteq_ptr(ERR_PTR(-ENOEXEC), map);
+
+	return 0;
+}
+DM_TEST(dm_test_regmap_base, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+
+/* Test we can access a regmap through syscon */
+static int dm_test_regmap_syscon(struct unit_test_state *uts)
+{
+	struct regmap *map;
+
+	map = syscon_get_regmap_by_driver_data(SYSCON0);
+	ut_assertok_ptr(map);
+	ut_asserteq(1, map->range_count);
+
+	map = syscon_get_regmap_by_driver_data(SYSCON1);
+	ut_assertok_ptr(map);
+	ut_asserteq(4, map->range_count);
+
+	map = syscon_get_regmap_by_driver_data(SYSCON_COUNT);
+	ut_asserteq_ptr(ERR_PTR(-ENODEV), map);
+
+	ut_asserteq(0x10, map_to_sysmem(syscon_get_first_range(SYSCON0)));
+	ut_asserteq(0x20, map_to_sysmem(syscon_get_first_range(SYSCON1)));
+	ut_asserteq_ptr(ERR_PTR(-ENODEV),
+			syscon_get_first_range(SYSCON_COUNT));
+
+	return 0;
+}
+
+DM_TEST(dm_test_regmap_syscon, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);