Merge remote-tracking branch 'asoc/topic/ak4104' into asoc-next

diff --git a/Documentation/devicetree/bindings/sound/ak4104.txt b/Documentation/devicetree/bindings/sound/ak4104.txt
new file mode 100644 (file)
index 0000000..b902ee3
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/ak4104.txt
@@ -0,0 +1,22 @@
+AK4104 S/PDIF transmitter
+
+This device supports SPI mode only.
+
+Required properties:
+
+  - compatible : "asahi-kasei,ak4104"
+
+  - reg : The chip select number on the SPI bus
+
+Optional properties:
+
+  - reset-gpio : a GPIO spec for the reset pin. If specified, it will be
+                deasserted before communication to the device starts.
+
+Example:
+
+spdif: ak4104@0 {
+       compatible = "asahi-kasei,ak4104";
+       reg = <0>;
+       spi-max-frequency = <5000000>;
+};

diff --git a/sound/soc/codecs/ak4104.c b/sound/soc/codecs/ak4104.c
index 31d4483245d0db951584a0e1619b91c8ac8fa726..4b11b82b227393c5d6a60311f417c7b846976bfa 100644 (file)
--- a/sound/soc/codecs/ak4104.c
+++ b/sound/soc/codecs/ak4104.c
@@ -15,6 +15,8 @@
 #include <sound/soc.h>
 #include <sound/initval.h>
 #include <linux/spi/spi.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
 #include <sound/asoundef.h>
 
 /* AK4104 registers addresses */
@@ -98,14 +100,32 @@ static int ak4104_hw_params(struct snd_pcm_substream *substream,
        val = 0;
 
        switch (params_rate(params)) {
+       case 22050:
+               val |= IEC958_AES3_CON_FS_22050;
+               break;
+       case 24000:
+               val |= IEC958_AES3_CON_FS_24000;
+               break;
+       case 32000:
+               val |= IEC958_AES3_CON_FS_32000;
+               break;
        case 44100:
                val |= IEC958_AES3_CON_FS_44100;
                break;
        case 48000:
                val |= IEC958_AES3_CON_FS_48000;
                break;
-       case 32000:
-               val |= IEC958_AES3_CON_FS_32000;
+       case 88200:
+               val |= IEC958_AES3_CON_FS_88200;
+               break;
+       case 96000:
+               val |= IEC958_AES3_CON_FS_96000;
+               break;
+       case 176400:
+               val |= IEC958_AES3_CON_FS_176400;
+               break;
+       case 192000:
+               val |= IEC958_AES3_CON_FS_192000;
                break;
        default:
                dev_err(codec->dev, "unsupported sampling rate\n");
@@ -186,6 +206,7 @@ static const struct regmap_config ak4104_regmap = {
 
 static int ak4104_spi_probe(struct spi_device *spi)
 {
+       struct device_node *np = spi->dev.of_node;
        struct ak4104_private *ak4104;
        unsigned int val;
        int ret;
@@ -201,49 +222,59 @@ static int ak4104_spi_probe(struct spi_device *spi)
        if (ak4104 == NULL)
                return -ENOMEM;
 
-       ak4104->regmap = regmap_init_spi(spi, &ak4104_regmap);
+       ak4104->regmap = devm_regmap_init_spi(spi, &ak4104_regmap);
        if (IS_ERR(ak4104->regmap)) {
                ret = PTR_ERR(ak4104->regmap);
                return ret;
        }
 
+       if (np) {
+               enum of_gpio_flags flags;
+               int gpio = of_get_named_gpio_flags(np, "reset-gpio", 0, &flags);
+
+               if (gpio_is_valid(gpio)) {
+                       ret = devm_gpio_request_one(&spi->dev, gpio,
+                                    flags & OF_GPIO_ACTIVE_LOW ?
+                                       GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH,
+                                    "ak4104 reset");
+                       if (ret < 0)
+                               return ret;
+               }
+       }
+
        /* read the 'reserved' register - according to the datasheet, it
         * should contain 0x5b. Not a good way to verify the presence of
         * the device, but there is no hardware ID register. */
        ret = regmap_read(ak4104->regmap, AK4104_REG_RESERVED, &val);
        if (ret != 0)
-               goto err;
-       if (val != AK4104_RESERVED_VAL) {
-               ret = -ENODEV;
-               goto err;
-       }
+               return ret;
+       if (val != AK4104_RESERVED_VAL)
+               return -ENODEV;
 
        spi_set_drvdata(spi, ak4104);
 
        ret = snd_soc_register_codec(&spi->dev,
                        &soc_codec_device_ak4104, &ak4104_dai, 1);
-       if (ret != 0)
-               goto err;
-
-       return 0;
-
-err:
-       regmap_exit(ak4104->regmap);
        return ret;
 }
 
 static int __devexit ak4104_spi_remove(struct spi_device *spi)
 {
-       struct ak4104_private *ak4101 = spi_get_drvdata(spi);
-       regmap_exit(ak4101->regmap);
        snd_soc_unregister_codec(&spi->dev);
        return 0;
 }
 
+static const struct of_device_id ak4104_of_match[] = {
+       { .compatible = "asahi-kasei,ak4104", },
+       { }
+};
+MODULE_DEVICE_TABLE(of, ak4104_of_match);
+
 static struct spi_driver ak4104_spi_driver = {
        .driver  = {
                .name   = DRV_NAME,
                .owner  = THIS_MODULE,
+               .of_match_table = ak4104_of_match,
        },
        .probe  = ak4104_spi_probe,
        .remove = __devexit_p(ak4104_spi_remove),