diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c
index cb2e405..3271379 100644
--- a/drivers/serial/sunzilog.c
+++ b/drivers/serial/sunzilog.c
@@ -1015,6 +1015,7 @@
 	.verify_port	=	sunzilog_verify_port,
 };
 
+static int uart_chip_count;
 static struct uart_sunzilog_port *sunzilog_port_table;
 static struct zilog_layout __iomem **sunzilog_chip_regs;
 
@@ -1350,16 +1351,22 @@
 
 static int __devinit zs_probe(struct of_device *op, const struct of_device_id *match)
 {
-	static int inst;
+	static int kbm_inst, uart_inst;
+	int inst;
 	struct uart_sunzilog_port *up;
 	struct zilog_layout __iomem *rp;
-	int keyboard_mouse;
+	int keyboard_mouse = 0;
 	int err;
 
-	keyboard_mouse = 0;
 	if (of_find_property(op->node, "keyboard", NULL))
 		keyboard_mouse = 1;
 
+	/* uarts must come before keyboards/mice */
+	if (keyboard_mouse)
+		inst = uart_chip_count + kbm_inst;
+	else
+		inst = uart_inst;
+
 	sunzilog_chip_regs[inst] = of_ioremap(&op->resource[0], 0,
 					      sizeof(struct zilog_layout),
 					      "zs");
@@ -1427,6 +1434,7 @@
 				   rp, sizeof(struct zilog_layout));
 			return err;
 		}
+		uart_inst++;
 	} else {
 		printk(KERN_INFO "%s: Keyboard at MMIO 0x%llx (irq = %d) "
 		       "is a %s\n",
@@ -1438,12 +1446,11 @@
 		       op->dev.bus_id,
 		       (unsigned long long) up[1].port.mapbase,
 		       op->irqs[0], sunzilog_type(&up[1].port));
+		kbm_inst++;
 	}
 
 	dev_set_drvdata(&op->dev, &up[0]);
 
-	inst++;
-
 	return 0;
 }
 
@@ -1491,28 +1498,25 @@
 static int __init sunzilog_init(void)
 {
 	struct device_node *dp;
-	int err, uart_count;
-	int num_keybms;
+	int err;
+	int num_keybms = 0;
 	int num_sunzilog = 0;
 
-	num_keybms = 0;
 	for_each_node_by_name(dp, "zs") {
 		num_sunzilog++;
 		if (of_find_property(dp, "keyboard", NULL))
 			num_keybms++;
 	}
 
-	uart_count = 0;
 	if (num_sunzilog) {
-		int uart_count;
-
 		err = sunzilog_alloc_tables(num_sunzilog);
 		if (err)
 			goto out;
 
-		uart_count = (num_sunzilog * 2) - (2 * num_keybms);
+		uart_chip_count = num_sunzilog - num_keybms;
 
-		err = sunserial_register_minors(&sunzilog_reg, uart_count);
+		err = sunserial_register_minors(&sunzilog_reg,
+						uart_chip_count * 2);
 		if (err)
 			goto out_free_tables;
 	}