ASoC: fsl-esai: big-endian support

For most platforms, the CPU and ESAI device is in the same endianess
mode. While for the LS1 platform, the CPU is in LE mode and the ESAI
is in BE mode.

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Acked-by: Nicolin Chen <Guangyu.Chen@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/Documentation/devicetree/bindings/sound/fsl,esai.txt b/Documentation/devicetree/bindings/sound/fsl,esai.txt
index d7b99fa637b59f713ef659563f476443f7df8a15..aeb8c4a0b88d4de37d17e97238d6beb16c6fd20e 100644 (file)
--- 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 f55341e5297052f552bb433ecea3ddd2f5c7f181..d8e13abd1bcabb3e5ceefca28f26cb820591a27e 100644 (file)
--- 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);