[PATCH] rng: xgene-rng: add ACPI support for APM X-Gene RNG unit

[Feng Kan]

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

Signed-off-by: Feng Kan <f...@apm.com>
---
 drivers/char/hw_random/xgene-rng.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/char/hw_random/xgene-rng.c 
b/drivers/char/hw_random/xgene-rng.c
index 23caa05..c37cf75 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),
        },
 };
 
-- 
1.9.1

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