UBUNTU: SAUCE: iio: dac: ad5593r: Add ACPI support

BugLink: https://bugs.launchpad.net/bugs/1654497

This patch adds the ACPI/PNP ID. The AD5592/3 driver core is already
designed around the unified device property API.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
(cherry picked from commit 2cc5b0df)
(source: git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git)
Signed-off-by: Shrirang Bagul <shrirang.bagul@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Brad Figg <brad.figg@canonical.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

drivers/iio/dac/ad5593r.c

@@ -13,6 +13,7 @@
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/acpi.h>
 
 #define AD5593R_MODE_CONF		(0 << 4)
 #define AD5593R_MODE_DAC_WRITE		(1 << 4)
@@ -115,10 +116,17 @@ static const struct of_device_id ad5593r_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, ad5593r_of_match);
 
+static const struct acpi_device_id ad5593r_acpi_match[] = {
+	{"ADS5593", },
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, ad5593r_acpi_match);
+
 static struct i2c_driver ad5593r_driver = {
 	.driver = {
 		.name = "ad5593r",
 		.of_match_table = of_match_ptr(ad5593r_of_match),
+		.acpi_match_table = ACPI_PTR(ad5593r_acpi_match),
 	},
 	.probe = ad5593r_i2c_probe,
 	.remove = ad5593r_i2c_remove,