ASoC: ssm2602: add device tree bindings

Allow the ssm2602/ssm2603/ssm2604 codec driver to be
instantiated from the device tree.

Also, add Kconfig prompts to allow manual selection of both the
I2C and SPI configuration versions of the driver.

Signed-off-by: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>

4 files changed, 41 insertions, 2 deletions

diff --git a/Documentation/devicetree/bindings/sound/adi,ssm2602.txt b/Documentation/devicetree/bindings/sound/adi,ssm2602.txt
new file mode 100644
index 000000000000..3b3302fe399b
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/adi,ssm2602.txt
@@ -0,0 +1,19 @@
+Analog Devices SSM2602, SSM2603 and SSM2604 I2S audio CODEC devices
+
+SSM2602 support both I2C and SPI as the configuration interface,
+the selection is made by the MODE strap-in pin.
+SSM2603 and SSM2604 only support I2C as the configuration interface.
+
+Required properties:
+
+  - compatible : One of "adi,ssm2602", "adi,ssm2603" or "adi,ssm2604"
+
+  - reg : the I2C address of the device for I2C, the chip select
+          number for SPI.
+
+ Example:
+
+        ssm2602: ssm2602@1a {
+                compatible = "adi,ssm2602";
+                reg = <0x1a>;
+        };
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 8838838e25ed..3649e7399ec7 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -520,12 +520,16 @@ config SND_SOC_SSM2602
         tristate
 
 config SND_SOC_SSM2602_SPI
+        tristate "Analog Devices SSM2602 CODEC - SPI"
+        depends on SPI_MASTER
         select SND_SOC_SSM2602
-        tristate
+        select REGMAP_SPI
 
 config SND_SOC_SSM2602_I2C
+        tristate "Analog Devices SSM2602 CODEC - I2C"
+        depends on I2C
         select SND_SOC_SSM2602
-        tristate
+        select REGMAP_I2C
 
 config SND_SOC_STA32X
         tristate
diff --git a/sound/soc/codecs/ssm2602-i2c.c b/sound/soc/codecs/ssm2602-i2c.c
index abd63d537173..0d9779d6bfda 100644
--- a/sound/soc/codecs/ssm2602-i2c.c
+++ b/sound/soc/codecs/ssm2602-i2c.c
@@ -41,10 +41,19 @@ static const struct i2c_device_id ssm2602_i2c_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, ssm2602_i2c_id);
 
+static const struct of_device_id ssm2602_of_match[] = {
+        { .compatible = "adi,ssm2602", },
+        { .compatible = "adi,ssm2603", },
+        { .compatible = "adi,ssm2604", },
+        { }
+};
+MODULE_DEVICE_TABLE(of, ssm2602_of_match);
+
 static struct i2c_driver ssm2602_i2c_driver = {
         .driver = {
                 .name = "ssm2602",
                 .owner = THIS_MODULE,
+                .of_match_table = ssm2602_of_match,
         },
         .probe = ssm2602_i2c_probe,
         .remove = ssm2602_i2c_remove,
diff --git a/sound/soc/codecs/ssm2602-spi.c b/sound/soc/codecs/ssm2602-spi.c
index 2bf55e24a7bb..b5df14fbe3ad 100644
--- a/sound/soc/codecs/ssm2602-spi.c
+++ b/sound/soc/codecs/ssm2602-spi.c
@@ -26,10 +26,17 @@ static int ssm2602_spi_remove(struct spi_device *spi)
         return 0;
 }
 
+static const struct of_device_id ssm2602_of_match[] = {
+        { .compatible = "adi,ssm2602", },
+        { }
+};
+MODULE_DEVICE_TABLE(of, ssm2602_of_match);
+
 static struct spi_driver ssm2602_spi_driver = {
         .driver = {
                 .name   = "ssm2602",
                 .owner  = THIS_MODULE,
+                .of_match_table = ssm2602_of_match,
         },
         .probe          = ssm2602_spi_probe,
         .remove         = ssm2602_spi_remove,