From 34aa2211e75f765b204792d764ac2beb324ac3ec Mon Sep 17 00:00:00 2001
From: Luiz Otavio O Souza <loos@FreeBSD.org>
Date: Sat, 31 May 2014 14:38:05 +0000
Subject: [PATCH] Ignore IIC_ENOADDR from iicbus_reset() as it only means we
 have a master-only controller.

This fixes the iic bus scan with i2c(8) (on supported controllers).

Tested with gpioiic(4).
---
 sys/dev/iicbus/iic.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sys/dev/iicbus/iic.c b/sys/dev/iicbus/iic.c
index 55084e997b2..16d113ee6c7 100644
--- a/sys/dev/iicbus/iic.c
+++ b/sys/dev/iicbus/iic.c
@@ -322,6 +322,12 @@ iicioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags, struct thread *t
 
 	case I2CRSTCARD:
 		error = iicbus_reset(parent, IIC_UNKNOWN, 0, NULL);
+		/*
+		 * Ignore IIC_ENOADDR as it only means we have a master-only
+		 * controller.
+		 */
+		if (error == IIC_ENOADDR)
+			error = 0;
 		break;
 
 	case I2CWRITE: