diff --git a/target/linux/mediatek/patches-5.4/0111-mt7986-trng-add-rng-support.patch b/target/linux/mediatek/patches-5.4/0111-mt7986-trng-add-rng-support.patch
new file mode 100644
index 0000000..1b132a3
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/0111-mt7986-trng-add-rng-support.patch
@@ -0,0 +1,46 @@
+From 6d4a858d6f7db2a86f6513a543feb8f7b8a8b4c1 Mon Sep 17 00:00:00 2001
+From: "Mingming.Su" <Mingming.Su@mediatek.com>
+Date: Wed, 30 Jun 2021 16:59:32 +0800
+Subject: [PATCH] mt7986: trng: add rng support
+
+1. Add trng compatible name for MT7986
+2. Fix mtk_rng_wait_ready() function
+
+Signed-off-by: Mingming.Su <Mingming.Su@mediatek.com>
+---
+ drivers/char/hw_random/mtk-rng.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/char/hw_random/mtk-rng.c b/drivers/char/hw_random/mtk-rng.c
+index e649be5a5..496adb0a0 100644
+--- a/drivers/char/hw_random/mtk-rng.c
++++ b/drivers/char/hw_random/mtk-rng.c
+@@ -22,7 +22,7 @@
+ #define RNG_AUTOSUSPEND_TIMEOUT		100
+ 
+ #define USEC_POLL			2
+-#define TIMEOUT_POLL			20
++#define TIMEOUT_POLL			60
+ 
+ #define RNG_CTRL			0x00
+ #define RNG_EN				BIT(0)
+@@ -77,7 +77,7 @@ static bool mtk_rng_wait_ready(struct hwrng *rng, bool wait)
+ 		readl_poll_timeout_atomic(priv->base + RNG_CTRL, ready,
+ 					  ready & RNG_READY, USEC_POLL,
+ 					  TIMEOUT_POLL);
+-	return !!ready;
++	return !!(ready & RNG_READY);
+ }
+ 
+ static int mtk_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
+@@ -181,6 +181,7 @@ static UNIVERSAL_DEV_PM_OPS(mtk_rng_pm_ops, mtk_rng_runtime_suspend,
+ #endif	/* CONFIG_PM */
+ 
+ static const struct of_device_id mtk_rng_match[] = {
++	{ .compatible = "mediatek,mt7986-rng" },
+ 	{ .compatible = "mediatek,mt7623-rng" },
+ 	{},
+ };
+-- 
+2.18.0
+