ARM64: dts: marvell: armada-3720 add RTC support

The Armada 3720 DB board has an RTC on the I2C bus. It's a PT7C4337A from
Pericom but which claims to be fully compatible with the ds1337.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm64/boot/dts/marvell/armada-3720-db.dts b/arch/arm64/boot/dts/marvell/armada-3720-db.dts
index 01e583c07d46..2a6eef2d4d66 100644
--- a/arch/arm64/boot/dts/marvell/armada-3720-db.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-db.dts
@@ -98,6 +98,12 @@
                  * IO0_7: PWR_EN_SGMII  IO1_7: PWR_MCI_PS
                  */
         };
+
+        rtc@68  {
+                /* PT7C4337A from pericom fully compatible with the ds1337 */
+                compatible = "dallas,ds1337";
+                reg = <0x68>;
+        };
 };
 
 /* CON3 */