ARM: tegra: enable GPU DT node when appropriate

T124/210 requires some specific configuration (VPR setup) to
be performed by the bootloader before the GPU can be used.
For this reason, the GPU node in the device tree is disabled
by default. This patch enables the node if U-boot has performed
VPR configuration.

Boards enabled by this patch are T124's Jetson TK1 and Venice2
and T210's P2571.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Tom Warren <twarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>

board/nvidia/jetson-tk1/jetson-tk1.c

@@ -11,6 +11,7 @@
 
 #include <asm/arch/gpio.h>
 #include <asm/arch/pinmux.h>
+#include <asm/arch-tegra/gpu.h>
 
 #include "pinmux-config-jetson-tk1.h"
 
@@ -79,3 +80,10 @@ int board_eth_init(bd_t *bis)
 	return pci_eth_init(bis);
 }
 #endif /* PCI */
+
+int ft_board_setup(void *blob, bd_t *bd)
+{
+	gpu_enable_node(blob, "/gpu@0,57000000");
+
+	return 0;
+}

board/nvidia/p2571/p2571.c

@@ -11,6 +11,7 @@
 #include <asm/arch/pinmux.h>
 #include <asm/gpio.h>
 #include "max77620_init.h"
+#include <asm/arch-tegra/gpu.h>
 #include "pinmux-config-p2571.h"
 
 void pin_mux_mmc(void)
@@ -61,3 +62,9 @@ void start_cpu_fan(void)
 	gpio_request(GPIO_PE4, "FAN_VDD");
 	gpio_direction_output(GPIO_PE4, 1);
 }
+
+int ft_board_setup(void *blob, bd_t *bd)
+{
+	gpu_enable_node(blob, "/gpu@0,57000000");
+	return 0;
+}

board/nvidia/venice2/venice2.c

@@ -8,6 +8,7 @@
 #include <common.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/pinmux.h>
+#include <asm/arch-tegra/gpu.h>
 #include "pinmux-config-venice2.h"
 
 /*
@@ -27,3 +28,10 @@ void pinmux_init(void)
 	pinmux_config_drvgrp_table(venice2_drvgrps,
 				   ARRAY_SIZE(venice2_drvgrps));
 }
+
+int ft_board_setup(void *blob, bd_t *bd)
+{
+	gpu_enable_node(blob, "/gpu@0,57000000");
+
+	return 0;
+}