[openwrt/openwrt] mediatek: add support for trng on mt7988a

[LEDE Commits]

dangole pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/afcec128c572eb1064472b772ffba3f44e2dbfeb

commit afcec128c572eb1064472b772ffba3f44e2dbfeb
Author: Marcos Alano <marcoshalano at gmail.com>
AuthorDate: Sun Sep 14 22:32:12 2025 -0300

    mediatek: add support for trng on mt7988a
    
    Add support for trng on mt7988a.
    
    Tested on Banana Pi BPI-R4.
    
    Signed-off-by: Marcos Alano <marcoshalano at gmail.com>
---
 .../patches-6.12/965-dts-mt7988a-add-trng-support.patch    | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/target/linux/mediatek/patches-6.12/965-dts-mt7988a-add-trng-support.patch b/target/linux/mediatek/patches-6.12/965-dts-mt7988a-add-trng-support.patch
new file mode 100644
index 0000000000..b6671fe630
--- /dev/null
+++ b/target/linux/mediatek/patches-6.12/965-dts-mt7988a-add-trng-support.patch
@@ -0,0 +1,14 @@
+diff --git a/arch/arm64/boot/dts/mediatek/mt7988a.dtsi b/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
+index aa728331e876..9da783f6412c 100644
+--- a/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
++++ b/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
+@@ -221,4 +221,8 @@ timer {
+ 			     <GIC_PPI 11 IRQ_TYPE_LEVEL_LOW>,
+ 			     <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>;
+ 	};
++
++	trng {
++		compatible = "mediatek,mt7988-rng";
++	};
+ };
+