[PATCH 2/4] arm64: dts: marvell: samsung,coreprimevelte: Use memory-region for framebuffer

[Duje Mihanović]

From: Duje Mihanović <duje at dujemihanovic.xyz>

Since the framebuffer resides in system RAM, use the memory-region
property preferred in that case over reg.

Also, testing showed that reusing most of the region (excluding where
the actual framebuffer resides) is perfectly safe, so do that and save
~22.5 MiB of RAM in the process.

Signed-off-by: Duje Mihanović <duje at dujemihanovic.xyz>
---
 arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts b/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts
index bb0a99399624..f71bb856f1e7 100644
--- a/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts
+++ b/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts
@@ -23,7 +23,7 @@ chosen {
 
 		fb0: framebuffer at 17177000 {
 			compatible = "simple-framebuffer";
-			reg = <0 0x17177000 0 (480 * 800 * 4)>;
+			memory-region = <&fb_mem>;
 			power-domains = <&apmu PXA1908_POWER_DOMAIN_DSI>;
 			width = <480>;
 			height = <800>;
@@ -48,8 +48,9 @@ secure-region at 0 {
 			reg = <0 0 0 0x1000000>;
 		};
 
-		framebuffer at 17000000 {
-			reg = <0 0x17000000 0 0x1800000>;
+		/* The "active buffer" is at 0x17000000 + (size of one buffer). */
+		fb_mem: framebuffer at 17177000 {
+			reg = <0 0x17177000 0 (480 * 800 * 4)>;
 			no-map;
 		};
 	};

-- 
2.53.0