D43362.diff
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	diff --git a/sys/dev/uart/uart_subr.c b/sys/dev/uart/uart_subr.c
	--- a/sys/dev/uart/uart_subr.c
	+++ b/sys/dev/uart/uart_subr.c
	@@ -47,6 +47,7 @@
	#define UART_TAG_SB 8
	#define UART_TAG_XO 9
	#define UART_TAG_BD 10
	+#define UART_TAG_RW 11

	static bus_addr_t
	uart_parse_addr(const char **p)
	@@ -148,6 +149,10 @@
	tag = UART_TAG_RS;
	goto out;
	}
	+ if ((p)[0] == 'r' && (p)[1] == 'w') {
	+ tag = UART_TAG_RW;
	+ goto out;
	+ }
	if ((p)[0] == 's' && (p)[1] == 'b') {
	tag = UART_TAG_SB;
	goto out;
	@@ -225,6 +230,7 @@
	/* Set defaults. */
	di->bas.chan = 0;
	di->bas.regshft = 0;
	+ di->bas.regiowidth = 1;
	di->bas.rclk = 0;
	di->baudrate = 0;
	di->databits = 8;
	@@ -264,6 +270,9 @@
	case UART_TAG_RS:
	di->bas.regshft = uart_parse_long(&spec);
	break;
	+ case UART_TAG_RW:
	+ di->bas.regiowidth = uart_parse_long(&spec);
	+ break;
	case UART_TAG_SB:
	di->stopbits = uart_parse_long(&spec);
	break;