ARM: tegra: move ft_system_setup()

Currently, ft_system_setup() is implemented by board*.c, which are a bit
of a dumping ground for a bunch of unrelated functionality, and separate
versions exist for pre-Tegra186 and Tegra186. Move the implementation into
a separate file to separate functionality, and allow sharing.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

arch/arm/mach-tegra/Makefile

@@ -25,6 +25,7 @@ obj-y += xusb-padctl-dummy.o
 endif
 
 obj-$(CONFIG_ARM64) += arm64-mmu.o
+obj-y += dt-setup.o
 obj-$(CONFIG_TEGRA_CLOCK_SCALING) += emc.o
 obj-$(CONFIG_TEGRA_GPU) += gpu.o
 obj-$(CONFIG_TEGRA_IVC) += ivc.o

arch/arm/mach-tegra/board186.c

@@ -41,8 +41,3 @@ int board_mmc_init(bd_t *bd)
 
 	return 0;
 }
-
-int ft_system_setup(void *blob, bd_t *bd)
-{
-	return 0;
-}

arch/arm/mach-tegra/board2.c

@@ -397,29 +397,3 @@ ulong board_get_usable_ram_top(ulong total_size)
 {
 	return CONFIG_SYS_SDRAM_BASE + usable_ram_size_below_4g();
 }
-
-/*
- * This function is called right before the kernel is booted. "blob" is the
- * device tree that will be passed to the kernel.
- */
-int ft_system_setup(void *blob, bd_t *bd)
-{
-	const char *gpu_compats[] = {
-#if defined(CONFIG_TEGRA124)
-		"nvidia,gk20a",
-#endif
-#if defined(CONFIG_TEGRA210)
-		"nvidia,gm20b",
-#endif
-	};
-	int i, ret;
-
-	/* Enable GPU node if GPU setup has been performed */
-	for (i = 0; i < ARRAY_SIZE(gpu_compats); i++) {
-		ret = tegra_gpu_enable_node(blob, gpu_compats[i]);
-		if (ret)
-			return ret;
-	}
-
-	return 0;
-}

arch/arm/mach-tegra/dt-setup.c

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2010-2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch-tegra/gpu.h>
+
+/*
+ * This function is called right before the kernel is booted. "blob" is the
+ * device tree that will be passed to the kernel.
+ */
+int ft_system_setup(void *blob, bd_t *bd)
+{
+	const char *gpu_compats[] = {
+#if defined(CONFIG_TEGRA124)
+		"nvidia,gk20a",
+#endif
+#if defined(CONFIG_TEGRA210)
+		"nvidia,gm20b",
+#endif
+	};
+	int i, ret;
+
+	/* Enable GPU node if GPU setup has been performed */
+	for (i = 0; i < ARRAY_SIZE(gpu_compats); i++) {
+		ret = tegra_gpu_enable_node(blob, gpu_compats[i]);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}