of: overlay: rename overlay source files from .dts to .dtso

In drivers/of/unittest-data/:
- Rename .dts overlay source files to use .dtso suffix.

Modify driver/of/unitest.c to use .dtbo.o based symbols instead of .dtb.o

Signed-off-by: Frank Rowand <[e-mail]>
Signed-off-by: Andrew Davis <[e-mail]>
Reviewed-by: Geert Uytterhoeven <[e-mail]>
Tested-by: Geert Uytterhoeven <[e-mail]>
Reviewed-by: Frank Rowand <[e-mail]>
Tested-by: Frank Rowand <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rob Herring <[e-mail]>

drivers/of/unittest-data/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
-obj-y += testcases.dtb.o
+obj-y += testcases.dtbo.o
 
-obj-$(CONFIG_OF_OVERLAY) += overlay.dtb.o \
-			    overlay_0.dtb.o \
-			    overlay_1.dtb.o \
-			    overlay_2.dtb.o \
-			    overlay_3.dtb.o \
-			    overlay_4.dtb.o \
-			    overlay_5.dtb.o \
-			    overlay_6.dtb.o \
-			    overlay_7.dtb.o \
-			    overlay_8.dtb.o \
-			    overlay_9.dtb.o \
-			    overlay_10.dtb.o \
-			    overlay_11.dtb.o \
-			    overlay_12.dtb.o \
-			    overlay_13.dtb.o \
-			    overlay_15.dtb.o \
-			    overlay_16.dtb.o \
-			    overlay_17.dtb.o \
-			    overlay_18.dtb.o \
-			    overlay_19.dtb.o \
-			    overlay_20.dtb.o \
-			    overlay_bad_add_dup_node.dtb.o \
-			    overlay_bad_add_dup_prop.dtb.o \
-			    overlay_bad_phandle.dtb.o \
-			    overlay_bad_symbol.dtb.o \
-			    overlay_base.dtb.o \
-			    overlay_gpio_01.dtb.o \
-			    overlay_gpio_02a.dtb.o \
-			    overlay_gpio_02b.dtb.o \
-			    overlay_gpio_03.dtb.o \
-			    overlay_gpio_04a.dtb.o \
-			    overlay_gpio_04b.dtb.o
+obj-$(CONFIG_OF_OVERLAY) += overlay.dtbo.o \
+			    overlay_0.dtbo.o \
+			    overlay_1.dtbo.o \
+			    overlay_2.dtbo.o \
+			    overlay_3.dtbo.o \
+			    overlay_4.dtbo.o \
+			    overlay_5.dtbo.o \
+			    overlay_6.dtbo.o \
+			    overlay_7.dtbo.o \
+			    overlay_8.dtbo.o \
+			    overlay_9.dtbo.o \
+			    overlay_10.dtbo.o \
+			    overlay_11.dtbo.o \
+			    overlay_12.dtbo.o \
+			    overlay_13.dtbo.o \
+			    overlay_15.dtbo.o \
+			    overlay_16.dtbo.o \
+			    overlay_17.dtbo.o \
+			    overlay_18.dtbo.o \
+			    overlay_19.dtbo.o \
+			    overlay_20.dtbo.o \
+			    overlay_bad_add_dup_node.dtbo.o \
+			    overlay_bad_add_dup_prop.dtbo.o \
+			    overlay_bad_phandle.dtbo.o \
+			    overlay_bad_symbol.dtbo.o \
+			    overlay_base.dtbo.o \
+			    overlay_gpio_01.dtbo.o \
+			    overlay_gpio_02a.dtbo.o \
+			    overlay_gpio_02b.dtbo.o \
+			    overlay_gpio_03.dtbo.o \
+			    overlay_gpio_04a.dtbo.o \
+			    overlay_gpio_04b.dtbo.o
 
 # enable creation of __symbols__ node
 DTC_FLAGS_overlay += -@

drivers/of/unittest.c

···
 	void *unittest_data_align;
 	struct device_node *unittest_data_node = NULL, *np;
 	/*
-	 * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
-	 * created by cmd_dt_S_dtb in scripts/Makefile.lib
+	 * __dtbo_testcases_begin[] and __dtbo_testcases_end[] are magically
+	 * created by cmd_dt_S_dtbo in scripts/Makefile.lib
 	 */
-	extern uint8_t __dtb_testcases_begin[];
-	extern uint8_t __dtb_testcases_end[];
-	const int size = __dtb_testcases_end - __dtb_testcases_begin;
+	extern uint8_t __dtbo_testcases_begin[];
+	extern uint8_t __dtbo_testcases_end[];
+	const int size = __dtbo_testcases_end - __dtbo_testcases_begin;
 	int rc;
 	void *ret;
 
···
 		return -ENOMEM;
 
 	unittest_data_align = PTR_ALIGN(unittest_data, FDT_ALIGN_SIZE);
-	memcpy(unittest_data_align, __dtb_testcases_begin, size);
+	memcpy(unittest_data_align, __dtbo_testcases_begin, size);
 
 	ret = of_fdt_unflatten_tree(unittest_data_align, NULL, &unittest_data_node);
 	if (!ret) {
···
 #ifdef CONFIG_OF_OVERLAY
 
 /*
- * __dtb_ot_begin[] and __dtb_ot_end[] are created by cmd_dt_S_dtb
- * in scripts/Makefile.lib
+ * __dtbo_##overlay_name##_begin[] and __dtbo_##overlay_name##_end[] are
+ * created by cmd_dt_S_dtbo in scripts/Makefile.lib
  */
 
-#define OVERLAY_INFO_EXTERN(name) \
-	extern uint8_t __dtb_##name##_begin[]; \
-	extern uint8_t __dtb_##name##_end[]
+#define OVERLAY_INFO_EXTERN(overlay_name) \
+	extern uint8_t __dtbo_##overlay_name##_begin[]; \
+	extern uint8_t __dtbo_##overlay_name##_end[]
 
-#define OVERLAY_INFO(overlay_name, expected)             \
-{	.dtb_begin       = __dtb_##overlay_name##_begin, \
-	.dtb_end         = __dtb_##overlay_name##_end,   \
-	.expected_result = expected,                     \
-	.name            = #overlay_name,                \
+#define OVERLAY_INFO(overlay_name, expected) \
+{	.dtbo_begin       = __dtbo_##overlay_name##_begin, \
+	.dtbo_end         = __dtbo_##overlay_name##_end, \
+	.expected_result = expected, \
+	.name            = #overlay_name, \
 }
 
 struct overlay_info {
-	uint8_t		*dtb_begin;
-	uint8_t		*dtb_end;
+	uint8_t		*dtbo_begin;
+	uint8_t		*dtbo_end;
 	int		expected_result;
 	int		ovcs_id;
 	char		*name;
···
 	OVERLAY_INFO(overlay_bad_phandle, -EINVAL),
 	OVERLAY_INFO(overlay_bad_symbol, -EINVAL),
 	/* end marker */
-	{.dtb_begin = NULL, .dtb_end = NULL, .expected_result = 0, .name = NULL}
+	{.dtbo_begin = NULL, .dtbo_end = NULL, .expected_result = 0, .name = NULL}
 };
 
 static struct device_node *overlay_base_root;
···
 		return;
 	}
 
-	data_size = info->dtb_end - info->dtb_begin;
+	data_size = info->dtbo_end - info->dtbo_begin;
 	if (!data_size) {
 		pr_err("No dtb 'overlay_base' to attach\n");
 		return;
 	}
 
-	size = fdt_totalsize(info->dtb_begin);
+	size = fdt_totalsize(info->dtbo_begin);
 	if (size != data_size) {
 		pr_err("dtb 'overlay_base' header totalsize != actual size");
 		return;
···
 		return;
 	}
 
-	memcpy(new_fdt, info->dtb_begin, size);
+	memcpy(new_fdt, info->dtbo_begin, size);
 
 	__unflatten_device_tree(new_fdt, NULL, &overlay_base_root,
 				dt_alloc_memory, true);
···
 		return 0;
 	}
 
-	size = info->dtb_end - info->dtb_begin;
+	size = info->dtbo_end - info->dtbo_begin;
 	if (!size)
 		pr_err("no overlay data for %s\n", overlay_name);
 
-	ret = of_overlay_fdt_apply(info->dtb_begin, size, &info->ovcs_id);
+	ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id);
 	if (ovcs_id)
 		*ovcs_id = info->ovcs_id;
 	if (ret < 0)