hwrng: xgene - add ACPI support for APM X-Gene RNG unit

This adds ACPI support for APM X-Gene RNG unit.

Signed-off-by: Feng Kan <fkan@apm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/char/hw_random/xgene-rng.c b/drivers/char/hw_random/xgene-rng.c
index 23caa05380a8..c37cf754a985 100644
--- a/drivers/char/hw_random/xgene-rng.c
+++ b/drivers/char/hw_random/xgene-rng.c
@@ -21,6 +21,7 @@
  *
  */
 
+#include <linux/acpi.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/hw_random.h>
@@ -310,6 +311,14 @@ static int xgene_rng_init(struct hwrng *rng)
         return 0;
 }
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id xgene_rng_acpi_match[] = {
+        { "APMC0D18", },
+        { }
+};
+MODULE_DEVICE_TABLE(acpi, xgene_rng_acpi_match);
+#endif
+
 static struct hwrng xgene_rng_func = {
         .name           = "xgene-rng",
         .init           = xgene_rng_init,
@@ -415,6 +424,7 @@ static struct platform_driver xgene_rng_driver = {
         .driver = {
                 .name           = "xgene-rng",
                 .of_match_table = xgene_rng_of_match,
+                .acpi_match_table = ACPI_PTR(xgene_rng_acpi_match),
         },
 };