D5986.1794573645.diff
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	Index: sys/dev/uart/uart_cpu_fdt.c
	===================================================================
	--- sys/dev/uart/uart_cpu_fdt.c
	+++ sys/dev/uart/uart_cpu_fdt.c
	@@ -122,6 +122,7 @@
	{
	const char *propnames[] = {"stdout-path", "linux,stdout-path", "stdout",
	"stdin-path", "stdin", NULL};
	+ const char *propname_dbg[] = "{"freebsd,debug-path", NULL};
	const char **name;
	struct uart_class *class;
	phandle_t node, chosen;
	@@ -135,8 +136,16 @@
	if (!err)
	return (0);

	- if (devtype != UART_DEV_CONSOLE)
	+ switch (devtype) {
	+ case UART_DEV_CONSOLE:
	+ cp = kern_getenv("hw.fdt.console");
	+ break;
	+ case UART_DEV_DBGPORT:
	+ cp = kern_getenv("hw.fdt.debug");
	+ break;
	+ default:
	return (ENXIO);
	+ }

	/* Has the user forced a specific device node? */
	cp = kern_getenv("hw.fdt.console");
	@@ -146,7 +155,11 @@
	*/
	node = -1;
	if ((chosen = OF_finddevice("/chosen")) != -1) {
	- for (name = propnames; *name != NULL; name++) {
	+ if (devtype == UART_DEV_DBGPORT)
	+ name = propnames_dbg;
	+ else
	+ name = propnames;
	+ for (; *name != NULL; name++) {
	if (phandle_chosen_propdev(chosen, *name,
	&node) == 0)
	break;