[openwrt/openwrt] uboot-mediatek: mt7986: support PSTORE/ramoops

[LEDE Commits]

dangole pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/85581cc89a0a4db8df0675458ef54534fdd65e1f

commit 85581cc89a0a4db8df0675458ef54534fdd65e1f
Author: Daniel Golle <daniel at makrotopia.org>
AuthorDate: Fri Aug 12 23:31:49 2022 +0200

    uboot-mediatek: mt7986: support PSTORE/ramoops
    
    Assign reserved memory for PSTORE/ramoops for the MT7986 SoC.
    
    Signed-off-by: Daniel Golle <daniel at makrotopia.org>
---
 .../patches/051-mt7986-enable-pstore.patch         | 38 ++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/package/boot/uboot-mediatek/patches/051-mt7986-enable-pstore.patch b/package/boot/uboot-mediatek/patches/051-mt7986-enable-pstore.patch
new file mode 100644
index 0000000000..15484bef55
--- /dev/null
+++ b/package/boot/uboot-mediatek/patches/051-mt7986-enable-pstore.patch
@@ -0,0 +1,38 @@
+--- a/arch/arm/dts/mt7986.dtsi
++++ b/arch/arm/dts/mt7986.dtsi
+@@ -46,6 +46,35 @@
+ 		};
+ 	};
+ 
++	psci {
++		compatible  = "arm,psci-0.2";
++		method      = "smc";
++	};
++
++	reserved-memory {
++		#address-cells = <2>;
++		#size-cells = <2>;
++		ranges;
++
++		/* 64 KiB reserved for ramoops/pstore */
++		ramoops at 42ff0000 {
++			compatible = "ramoops";
++			reg = <0 0x42ff0000 0 0x10000>;
++			record-size = <0x1000>;
++		};
++
++		/* 192 KiB reserved for ARM Trusted Firmware (BL31) */
++		secmon_reserved: secmon at 43000000 {
++			reg = <0 0x43000000 0 0x30000>;
++			no-map;
++		};
++
++		wmcpu_emi: wmcpu-reserved at 4fc00000 {
++			no-map;
++			reg = <0 0x4fc00000 0 0x00100000>;
++		};
++	};
++
+ 	dummy_clk: dummy12m {
+ 		compatible = "fixed-clock";
+ 		clock-frequency = <12000000>;