3 files changed, 21 insertions, 3 deletions

diff --git a/Documentation/devicetree/bindings/sound/cs4271.txt b/Documentation/devicetree/bindings/sound/cs4271.txt
index c81b5fd5a5bc..a850fb9c88ea 100644
--- a/Documentation/devicetree/bindings/sound/cs4271.txt
+++ b/Documentation/devicetree/bindings/sound/cs4271.txt
@@ -18,6 +18,8 @@ Optional properties:
 
  - reset-gpio:  a GPIO spec to define which pin is connected to the chip's
                 !RESET pin
+ - cirrus,amuteb-eq-bmutec:     When given, the Codec's AMUTEB=BMUTEC flag
+                                is enabled.
 
 Examples:
 
diff --git a/include/sound/cs4271.h b/include/sound/cs4271.h
index 50a059e7d116..6d9e15ed1dcf 100644
--- a/include/sound/cs4271.h
+++ b/include/sound/cs4271.h
@@ -19,6 +19,7 @@
 
 struct cs4271_platform_data {
         int gpio_nreset;        /* GPIO driving Reset pin, if any */
+        int amutec_eq_bmutec:1; /* flag to enable AMUTEC=BMUTEC */
 };
 
 #endif /* __CS4271_H */
diff --git a/sound/soc/codecs/cs4271.c b/sound/soc/codecs/cs4271.c
index f994af34f552..2ac5fe61a96c 100644
--- a/sound/soc/codecs/cs4271.c
+++ b/sound/soc/codecs/cs4271.c
@@ -474,15 +474,25 @@ static int cs4271_probe(struct snd_soc_codec *codec)
         struct cs4271_platform_data *cs4271plat = codec->dev->platform_data;
         int ret;
         int gpio_nreset = -EINVAL;
+        int amutec_eq_bmutec = 0;
 
 #ifdef CONFIG_OF
-        if (of_match_device(cs4271_dt_ids, codec->dev))
+        if (of_match_device(cs4271_dt_ids, codec->dev)) {
                 gpio_nreset = of_get_named_gpio(codec->dev->of_node,
                                                 "reset-gpio", 0);
+
+                if (!of_get_property(codec->dev->of_node,
+                                     "cirrus,amutec-eq-bmutec", NULL))
+                        amutec_eq_bmutec = 1;
+        }
 #endif
 
-        if (cs4271plat && gpio_is_valid(cs4271plat->gpio_nreset))
-                gpio_nreset = cs4271plat->gpio_nreset;
+        if (cs4271plat) {
+                if (gpio_is_valid(cs4271plat->gpio_nreset))
+                        gpio_nreset = cs4271plat->gpio_nreset;
+
+                amutec_eq_bmutec = cs4271plat->amutec_eq_bmutec;
+        }
 
         if (gpio_nreset >= 0)
                 if (gpio_request(gpio_nreset, "CS4271 Reset"))
@@ -528,6 +538,11 @@ static int cs4271_probe(struct snd_soc_codec *codec)
         /* Power-up sequence requires 85 uS */
         udelay(85);
 
+        if (amutec_eq_bmutec)
+                snd_soc_update_bits(codec, CS4271_MODE2,
+                                    CS4271_MODE2_MUTECAEQUB,
+                                    CS4271_MODE2_MUTECAEQUB);
+
         return snd_soc_add_codec_controls(codec, cs4271_snd_controls,
                 ARRAY_SIZE(cs4271_snd_controls));
 }