From 79d1acd17f89a3cecd6bd670eec69ec16b2b6f32 Mon Sep 17 00:00:00 2001
From: Thomas Ingleby <thomas.c.ingleby@intel.com>
Date: Mon, 29 Jun 2015 19:45:16 +0100
Subject: [PATCH] x86: edison: add check in init_pre uart hook

If none 0 index passed, will log error.
Related to #152

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
---
 src/x86/intel_edison_fab_c.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/x86/intel_edison_fab_c.c b/src/x86/intel_edison_fab_c.c
index 809c6c7..7945e83 100644
--- a/src/x86/intel_edison_fab_c.c
+++ b/src/x86/intel_edison_fab_c.c
@@ -559,6 +559,10 @@ mraa_intel_edsion_mb_gpio_mode(mraa_gpio_context dev, gpio_mode_t mode)
 mraa_result_t
 mraa_intel_edison_uart_init_pre(int index)
 {
+    if (index != 0) {
+        syslog(LOG_ERR, "edison: Failed to write to drive mode");
+        return MRAA_ERROR_INVALID_RESOURCE;
+    }
     if (miniboard == 0) {
         mraa_gpio_write(tristate, 0);
         mraa_gpio_context io0_output = mraa_gpio_init_raw(248);