2 files changed, 9 insertions, 1 deletions

diff --git a/Documentation/devicetree/bindings/sound/fsl,esai.txt b/Documentation/devicetree/bindings/sound/fsl,esai.txt
index d7b99fa637b5..aeb8c4a0b88d 100644
--- a/Documentation/devicetree/bindings/sound/fsl,esai.txt
+++ b/Documentation/devicetree/bindings/sound/fsl,esai.txt
@@ -34,6 +34,10 @@ Required properties:
     that ESAI would work in the synchronous mode, which means all the settings
     for Receiving would be duplicated from Transmition related registers.
 
+  - big-endian : If this property is absent, the native endian mode will
+    be in use as default, or the big endian mode will be in use for all the
+    device registers.
+
 Example:
 
 esai: esai@02024000 {
@@ -46,5 +50,6 @@ esai: esai@02024000 {
         dma-names = "rx", "tx";
         fsl,fifo-depth = <128>;
         fsl,esai-synchronous;
+        big-endian;
         status = "disabled";
 };
diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c
index f55341e52970..d8e13abd1bca 100644
--- a/sound/soc/fsl/fsl_esai.c
+++ b/sound/soc/fsl/fsl_esai.c
@@ -678,7 +678,7 @@ static bool fsl_esai_writeable_reg(struct device *dev, unsigned int reg)
         }
 }
 
-static const struct regmap_config fsl_esai_regmap_config = {
+static struct regmap_config fsl_esai_regmap_config = {
         .reg_bits = 32,
         .reg_stride = 4,
         .val_bits = 32,
@@ -704,6 +704,9 @@ static int fsl_esai_probe(struct platform_device *pdev)
         esai_priv->pdev = pdev;
         strcpy(esai_priv->name, np->name);
 
+        if (of_property_read_bool(np, "big-endian"))
+                fsl_esai_regmap_config.val_format_endian = REGMAP_ENDIAN_BIG;
+
         /* Get the addresses and IRQ */
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         regs = devm_ioremap_resource(&pdev->dev, res);