starfive: visionfive2: add CMA entry into board DTS

This entry is present in the SDK kernel and is poked by the bootloader.

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>

diff --git a/target/linux/starfive/patches-6.12/1025-riscv-dts-starfive-visionfive2-add-dma-pool-entry.patch b/target/linux/starfive/patches-6.12/1025-riscv-dts-starfive-visionfive2-add-dma-pool-entry.patch
new file mode 100644 (file)
index 0000000..437266c
--- /dev/null
+++ b/target/linux/starfive/patches-6.12/1025-riscv-dts-starfive-visionfive2-add-dma-pool-entry.patch
@@ -0,0 +1,31 @@
+From 928a660ec1124853d2dae074e74ec7b20fe9bac2 Mon Sep 17 00:00:00 2001
+From: Zoltan HERPAI <wigyori@uid0.hu>
+Date: Sun, 1 Jun 2025 16:02:38 +0000
+Subject: [PATCH] riscv: dts: starfive: visionfive2: add dma pool entry
+
+In the VF2 SDK there is a reserved memory for a shared dma pool, which is
+also updated by the SDK bootloader. Add this node here as well.
+
+Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>
+---
+ .../boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi  | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+--- a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
++++ b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
+@@ -25,6 +25,15 @@
+               e24_mem: e24@c0000000 {
+                       reg = <0x0 0x6ce00000 0x0 0x1600000>;
+               };
++
++              linux,cma {
++                      compatible = "shared-dma-pool";
++                      reusable;
++                      size = <0x0 0x20000000>;
++                      alignment = <0x0 0x1000>;
++                      alloc-ranges = <0x0 0x70000000 0x0 0x20000000>;
++                      linux,cma-default;
++              };
+       };
+ 
+       leds {