spl:mc3: Set TTLOUT1 in SPL

The TTLOUT1 must be set early during boot.

board/keithkoep/trizeps8plus/spl.c

@@ -10,7 +10,6 @@
 #include <spl.h>
 #include <asm/io.h>
 #include <errno.h>
-#include <asm/io.h>
 #include <asm/mach-imx/iomux-v3.h>
 #include <asm/arch/imx8mp_pins.h>
 #include <asm/arch/sys_proto.h>
@@ -29,6 +28,8 @@ DECLARE_GLOBAL_DATA_PTR;
 
 #include "../common/kuk_boards.h"
 
+#define TTLOUT1_GPIO IMX_GPIO_NR(1, 5)
+
 extern struct dram_timing_info dram_timing;
 extern struct dram_timing_info dram_timing_mc3;
 
@@ -415,6 +416,11 @@ void board_init_f(ulong dummy)
 	/* Adjust pmic voltage to 1.0V for 800M */
 	if (( module == KUK_MODULE_UNKNOWN ) || ( module == GUF_MODULE_MC3 )) {
 		setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info_p1);
+
+#if CONFIG_SPL_GPIO_SUPPORT
+		gpio_request(TTLOUT1_GPIO, "TTLOUT1");
+		gpio_direction_output(TTLOUT1_GPIO, 0);
+#endif
 	} else { // Trizeps8plus
 		setup_i2c(2, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info_p3);
 	}