ASoC: rt5640: add an of_match table

Add a device tree match table. This serves to make the driver's support
of device tree more explicit. Perhaps the fallback for DT matching to
using the i2c_device_id table will go away one day, since it fails in
face of devices from different vendors with the same name.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/sound/soc/codecs/rt5640.c b/sound/soc/codecs/rt5640.c
index 0061ae6b6716..68b4dd622b87 100644
--- a/sound/soc/codecs/rt5640.c
+++ b/sound/soc/codecs/rt5640.c
@@ -2074,6 +2074,14 @@ static const struct i2c_device_id rt5640_i2c_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, rt5640_i2c_id);
 
+#if defined(CONFIG_OF)
+static const struct of_device_id rt5640_of_match[] = {
+        { .compatible = "realtek,rt5640", },
+        {},
+};
+MODULE_DEVICE_TABLE(of, rt5640_of_match);
+#endif
+
 #ifdef CONFIG_ACPI
 static struct acpi_device_id rt5640_acpi_match[] = {
         { "INT33CA", 0 },
@@ -2203,6 +2211,7 @@ static struct i2c_driver rt5640_i2c_driver = {
                 .name = "rt5640",
                 .owner = THIS_MODULE,
                 .acpi_match_table = ACPI_PTR(rt5640_acpi_match),
+                .of_match_table = of_match_ptr(rt5640_of_match),
         },
         .probe = rt5640_i2c_probe,
         .remove   = rt5640_i2c_remove,