ASoC: wm8804: Add ACPI support

HID made of either Wolfson/CirrusLogic PCI ID + 8804 identifier.

This helps enumerate the HifiBerry Digi+ HAT boards on the Up2 platform.

The scripts at https://github.com/thesofproject/acpi-scripts can be
used to add the ACPI initrd overlays.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 14 insertions, 1 deletions

diff --git a/sound/soc/codecs/wm8804-i2c.c b/sound/soc/codecs/wm8804-i2c.c
index f27464c2c5ba..79541960f45d 100644
--- a/sound/soc/codecs/wm8804-i2c.c
+++ b/sound/soc/codecs/wm8804-i2c.c
@@ -13,6 +13,7 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/i2c.h>
+#include <linux/acpi.h>
 
 #include "wm8804.h"
 
@@ -40,17 +41,29 @@ static const struct i2c_device_id wm8804_i2c_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, wm8804_i2c_id);
 
+#if defined(CONFIG_OF)
 static const struct of_device_id wm8804_of_match[] = {
         { .compatible = "wlf,wm8804", },
         { }
 };
 MODULE_DEVICE_TABLE(of, wm8804_of_match);
+#endif
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id wm8804_acpi_match[] = {
+        { "1AEC8804", 0 }, /* Wolfson PCI ID + part ID */
+        { "10138804", 0 }, /* Cirrus Logic PCI ID + part ID */
+        { },
+};
+MODULE_DEVICE_TABLE(acpi, wm8804_acpi_match);
+#endif
 
 static struct i2c_driver wm8804_i2c_driver = {
         .driver = {
                 .name = "wm8804",
                 .pm = &wm8804_pm,
-                .of_match_table = wm8804_of_match,
+                .of_match_table = of_match_ptr(wm8804_of_match),
+                .acpi_match_table = ACPI_PTR(wm8804_acpi_match),
         },
         .probe = wm8804_i2c_probe,
         .remove = wm8804_i2c_remove,