sandbox: Add a test device that uses of-platdata

Start up the test devices. These print out of-platdata contents, providing a
check that the of-platdata feature is working correctly.

The device-tree changes are made to sandbox.dts rather than test.dts. since
the former controls the of-platdata generation.

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

arch/sandbox/cpu/spl.c

@@ -6,6 +6,7 @@
 #include <common.h>
 #include <dm.h>
 #include <os.h>
+#include <spl.h>
 #include <asm/spl.h>
 #include <asm/state.h>
 
@@ -49,3 +50,19 @@ int spl_board_load_image(void)
 	/* Hopefully this will not return */
 	return os_spl_to_uboot(fname);
 }
+
+void spl_board_init(void)
+{
+	struct udevice *dev;
+
+	preloader_console_init();
+
+	/*
+	* Scan all the devices so that we can output their platform data. See
+	* sandbox_spl_probe().
+	*/
+	for (uclass_first_device(UCLASS_MISC, &dev);
+	dev;
+	uclass_next_device(&dev))
+		;
+}

arch/sandbox/dts/sandbox.dts

@@ -172,6 +172,37 @@
 		};
 	};
 
+	spl-test {
+		u-boot,dm-pre-reloc;
+		compatible = "sandbox,spl-test";
+		boolval;
+		intval = <1>;
+		intarray = <2 3 4>;
+		byteval = [05];
+		bytearray = [06];
+		longbytearray = [09 0a 0b 0c 0d 0e 0f 10 11];
+		stringval = "message";
+		stringarray = "multi-word", "message";
+	};
+
+	spl-test2 {
+		u-boot,dm-pre-reloc;
+		compatible = "sandbox,spl-test";
+		intval = <3>;
+		intarray = <5>;
+		byteval = [08];
+		bytearray = [01 23 34];
+		longbytearray = [09 0a 0b 0c];
+		stringval = "message2";
+		stringarray = "another", "multi-word", "message";
+	};
+
+	spl-test3 {
+		u-boot,dm-pre-reloc;
+		compatible = "sandbox,spl-test";
+		stringarray = "one";
+	};
+
 	square {
 		compatible = "demo-shape";
 		colour = "blue";

include/configs/sandbox_spl.h

@@ -8,6 +8,8 @@
 
 #include <configs/sandbox.h>
 
+#define CONFIG_SPL_BOARD_INIT
+
 #define CONFIG_SPL_DRIVERS_MISC_SUPPORT
 #define CONFIG_SPL_ENV_SUPPORT
 #define CONFIG_SPL_FRAMEWORK