awac-pdm: improve read_stat().

devices/sound/awacs.cpp

@@ -105,9 +105,8 @@ AwacDevicePdm::AwacDevicePdm() : AwacsBase("AWAC-PDM")
 
 uint32_t AwacDevicePdm::read_stat()
 {
-    LOG_F(INFO, "%s: status requested!", this->name.c_str());
-    // TODO: return valid status including manufacturer & device IDs
-    return 0;
+    // TODO: implement all other status bits
+    return (AWAC_REV_AWACS << 12) | (AWAC_MAKER_CRYSTAL << 8);
 }
 
 void AwacDevicePdm::write_ctrl(uint32_t addr, uint16_t value)

devices/sound/awacs.h

@@ -149,8 +149,9 @@ public:
     virtual void     snd_ctrl_write(uint32_t offset, uint32_t value, int size) = 0;
 };
 
-/** AWACs Screamer manufacturer and revision. */
+/** AWACs manufacturers and revisions. */
 #define AWAC_MAKER_CRYSTAL  1
+#define AWAC_REV_AWACS      2
 #define AWAC_REV_SCREAMER   3
 
 /** Screamer sound codec. */