diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile
index 12c59dd7b5fd3..c7666165453a3 100644
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -19,6 +19,7 @@ dtb-$(RPI_DT_OVERLAYS) += hifiberry-digi-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += hy28a-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += hy28b-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += i2c-rtc-overlay.dtb
+dtb-$(RPI_DT_OVERLAYS) += i2s-mmap-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += iqaudio-dac-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += iqaudio-dacplus-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += lirc-rpi-overlay.dtb
diff --git a/arch/arm/boot/dts/overlays/i2s-mmap-overlay.dts b/arch/arm/boot/dts/overlays/i2s-mmap-overlay.dts
new file mode 100644
index 0000000000000..a11160afa4bfb
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/i2s-mmap-overlay.dts
@@ -0,0 +1,13 @@
+/dts-v1/;
+/plugin/;
+
+/{
+	compatible = "brcm,bcm2708";
+
+	fragment@0 {
+		target = <&i2s>;
+		__overlay__ {
+			brcm,enable-mmap;
+		};
+	};
+};
diff --git a/sound/soc/bcm/bcm2708-i2s.c b/sound/soc/bcm/bcm2708-i2s.c
index 7570e50cd19ca..1b28aca77290c 100644
--- a/sound/soc/bcm/bcm2708-i2s.c
+++ b/sound/soc/bcm/bcm2708-i2s.c
@@ -874,7 +874,7 @@ static const struct snd_soc_component_driver bcm2708_i2s_component = {
 	.name		= "bcm2708-i2s-comp",
 };
 
-static const struct snd_pcm_hardware bcm2708_pcm_hardware = {
+static struct snd_pcm_hardware bcm2708_pcm_hardware = {
 	.info			= SNDRV_PCM_INFO_INTERLEAVED |
 				  SNDRV_PCM_INFO_JOINT_DUPLEX,
 	.formats		= SNDRV_PCM_FMTBIT_S16_LE |
@@ -902,6 +902,11 @@ static int bcm2708_i2s_probe(struct platform_device *pdev)
 	struct regmap *regmap[2];
 	struct resource *mem[2];
 
+	if (of_property_read_bool(pdev->dev.of_node, "brcm,enable-mmap"))
+		bcm2708_pcm_hardware.info |=
+			SNDRV_PCM_INFO_MMAP |
+			SNDRV_PCM_INFO_MMAP_VALID;
+
 	/* Request both ioareas */
 	for (i = 0; i <= 1; i++) {
 		void __iomem *base;