SAMA5 WM8904: Add option to use MAINCK as WM8904 MCLK

configs/sama5d3x-ek/Kconfig

@@ -260,5 +260,16 @@ config SAMA5D3xEK_WM8904_I2CFREQUENCY
 		the WM8904.  If you have problems communicating with the WM8904,
 		then you might want to try lowering this rate.
 
+choice
+	prompt "WM8904 MCLK source"
+	default SAMA5D3xEK_WM8904_SRCMAIN
+
+config SAMA5D3xEK_WM8904_SRCMAIN
+	bool "Main Clock (12MHz)"
+
+config SAMA5D3xEK_WM8904_SRCSCK
+	bool "Slow XTAL (32.768KHz)"
+
+endchoice # WM8904 MCLK source
 endif # AUDIO_WM8904
 endif # ARCH_BOARD_SAMA5D3X_EK

configs/sama5d3x-ek/src/sam_wm8904.c

@@ -120,7 +120,11 @@ static struct sama5d3ek_mwinfo_s g_mxtinfo =
   {
     .address   = WM8904_I2C_ADDRESS,
     .frequency = CONFIG_SAMA5D3xEK_WM8904_I2CFREQUENCY,
+#ifdef CONFIG_SAMA5D3xEK_WM8904_SRCSCK
     .mclk      = BOARD_SLOWCLK_FREQUENCY,
+#else
+    .mclk      = BOARD_MAINCK_FREQUENCY,
+#endif
 
     .attach    = wm8904_attach,
     .enable    = wm8904_enable,
@@ -281,8 +285,16 @@ int sam_wm8904_initialize(int minor)
        * that is connected to the WM8904 MCLK.
        */
 
+#ifdef CONFIG_SAMA5D3xEK_WM8904_SRCSCK
+      /* Drive the DAC with the slow clock (32.768 KHz) */
+
       sam_sckc_enable(true);
       (void)sam_pck_configure(PCK0, PCKSRC_SCK, BOARD_SLOWCLK_FREQUENCY);
+#else
+      /* Drive the DAC with the main clock (12 MHz) */
+
+      (void)sam_pck_configure(PCK0, PCKSRC_MAINCK, BOARD_MAINCK_FREQUENCY);
+#endif
 
       /* Enable the DAC master clock */
 

configs/sama5d4-ek/Kconfig

@@ -280,5 +280,16 @@ config SAMA5D4EK_WM8904_I2CFREQUENCY
 		the WM8904.  If you have problems communicating with the WM8904,
 		then you might want to try lowering this rate.
 
+choice
+	prompt "WM8904 MCLK source"
+	default SAMA5D4EK_WM8904_SRCMAIN
+
+config SAMA5D4EK_WM8904_SRCMAIN
+	bool "Main Clock (12MHz)"
+
+config SAMA5D4EK_WM8904_SRCSCK
+	bool "Slow XTAL (32.768KHz)"
+
+endchoice # WM8904 MCLK source
 endif # AUDIO_WM8904
 endif # ARCH_BOARD_SAMA5D4_EK

configs/sama5d4-ek/src/sam_wm8904.c

@@ -120,7 +120,11 @@ static struct sama5d4ek_mwinfo_s g_mxtinfo =
   {
     .address   = WM8904_I2C_ADDRESS,
     .frequency = CONFIG_SAMA5D4EK_WM8904_I2CFREQUENCY,
+#ifdef CONFIG_SAMA5D4EK_WM8904_SRCSCK
     .mclk      = BOARD_SLOWCLK_FREQUENCY,
+#else
+    .mclk      = BOARD_MAINCK_FREQUENCY,
+#endif
 
     .attach    = wm8904_attach,
     .enable    = wm8904_enable,
@@ -281,8 +285,16 @@ int sam_wm8904_initialize(int minor)
        * that is connected to the WM8904 MCLK.
        */
 
+#ifdef CONFIG_SAMA5D4EK_WM8904_SRCSCK
+      /* Drive the DAC with the slow clock (32.768 KHz) */
+
       sam_sckc_enable(true);
       (void)sam_pck_configure(PCK2, PCKSRC_SCK, BOARD_SLOWCLK_FREQUENCY);
+#else
+      /* Drive the DAC with the main clock (12 MHz) */
+
+      (void)sam_pck_configure(PCK0, PCKSRC_MAINCK, BOARD_MAINCK_FREQUENCY);
+#endif
 
       /* Enable the DAC master clock */