aio: add initial analog input support

Signed-off-by: Nandkishor Sonar <nandkishor.sonar@intel.com>
Reviewed-by: Brendan Le Foll <brendan.le.foll@intel.com>

examples/analogin_a0.c

@@ -0,0 +1,48 @@
+/*
+ * Author: Nandkishor Sonar
+ * Copyright (c) 2014 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <unistd.h>
+
+#include "aio.h"
+
+int main ()
+{
+    maa_aio_context* adc_a0;
+    unsigned int adc_value = 0;
+    int i = 0;
+
+    adc_a0 = maa_aio_init(A0);
+    if (adc_a0 == NULL) {
+        return 1;
+    }
+
+    for(i = 0; i < 10; i++) {
+        adc_value = maa_aio_read_u16(adc_a0);
+        fprintf(stdout, "ADC A0 read %X\n", adc_value);
+    }
+
+    maa_aio_close(adc_a0);
+
+    return MAA_SUCCESS;
+}