3 files changed, 48 insertions, 0 deletions
diff --git a/arch/arm/mach-k3/Kconfig b/arch/arm/mach-k3/Kconfig
index de1c1cc73f..5583241943 100644
--- a/arch/arm/mach-k3/Kconfig
+++ b/arch/arm/mach-k3/Kconfig
@@ -66,6 +66,27 @@ config SYS_K3_BOOT_CORE_ID
 	int
 	default 16
 
+config K3_EARLY_CONS
+	bool "Activate to allow for an early console during SPL"
+	depends on SPL
+	help
+	  Turn this option on to enable an early console functionality in SPL
+	  before the main console is being brought up. This can be useful in
+	  situations where the main console is dependent on System Firmware
+	  (SYSFW) being up and running, which is usually not the case during
+	  the very early stages of boot. Using this early console functionality
+	  will allow for an alternate serial port to be used to support things
+	  like UART-based boot and early diagnostic messages until the main
+	  console is ready to get activated.
+
+config K3_EARLY_CONS_IDX
+	depends on K3_EARLY_CONS
+	int "Index of serial device to use for SPL early console"
+	default 1
+	help
+	  Use this option to set the index of the serial device to be used
+	  for the early console during SPL execution.
+
 config K3_LOAD_SYSFW
 	bool
 	depends on SPL
diff --git a/arch/arm/mach-k3/common.c b/arch/arm/mach-k3/common.c
index c16afc654f..6c453b9af4 100644
--- a/arch/arm/mach-k3/common.c
+++ b/arch/arm/mach-k3/common.c
@@ -27,6 +27,32 @@ struct ti_sci_handle *get_ti_sci_handle(void)
 	return (struct ti_sci_handle *)ti_sci_get_handle_from_sysfw(dev);
 }
 
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_K3_EARLY_CONS
+int early_console_init(void)
+{
+	struct udevice *dev;
+	int ret;
+
+	gd->baudrate = CONFIG_BAUDRATE;
+
+	ret = uclass_get_device_by_seq(UCLASS_SERIAL, CONFIG_K3_EARLY_CONS_IDX,
+				       &dev);
+	if (ret) {
+		printf("Error getting serial dev for early console! (%d)\n",
+		       ret);
+		return ret;
+	}
+
+	gd->cur_serial_dev = dev;
+	gd->flags |= GD_FLG_SERIAL_READY;
+	gd->have_console = 1;
+
+	return 0;
+}
+#endif
+
 #ifdef CONFIG_SYS_K3_SPL_ATF
 void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 {
diff --git a/arch/arm/mach-k3/common.h b/arch/arm/mach-k3/common.h
index ac7e80d9af..ab68e14de8 100644
--- a/arch/arm/mach-k3/common.h
+++ b/arch/arm/mach-k3/common.h
@@ -9,3 +9,4 @@
 #include <asm/armv7_mpu.h>
 
 void setup_k3_mpu_regions(void);
+int early_console_init(void);