sim/audio register mixer device

add amixer register code

Signed-off-by: liuwei35 <liuwei35@xiaomi.com>

arch/sim/src/sim/posix/sim_alsa.c

@@ -595,6 +595,11 @@ static int sim_audio_ioctl(struct audio_lowerhalf_s *dev, int cmd,
         }
         break;
 
+        case AUDIOIOC_SETPARAMTER:
+        {
+          audinfo("%s , arg: %s\n", __func__, (char *)arg);
+        } break;
+
       default:
         ret = -ENOTTY;
         break;

arch/sim/src/sim/sim_initialize.c

@@ -299,6 +299,11 @@ void up_initialize(void)
 
   audio_register("pcm1p", sim_audio_initialize(true, true));
   audio_register("pcm1c", sim_audio_initialize(false, true));
+
+  /* register independent mixer device, simulate amixer ioctl */
+
+  audio_register("mixer", sim_audio_initialize(false, false));
+
 #endif
 
 #ifdef CONFIG_SIM_USB_DEV