overlays-03-add-rk3318-box-emmc-ddr(:1)

Original-Subject: rk3318-box: add eMMC DDR support device tree overlay for rk3318-box None X-Armbian: Patch-File: overlays-03-add-rk3318-box-emmc-ddr X-Armbian: Patch-File-Counter: 1 X-Armbian: Patch-Rel-Directory: patch/kernel/archive/rockchip64-6.1 X-Armbian: Patch-Type: kernel X-Armbian: Patch-Root-Type: core X-Armbian: Patch-Sub-Type: common X-Armbian: Original-Subject: rk3318-box: add eMMC DDR support device tree overlay for rk3318-box
rpardini · Apr 17, 2021 · dbf3cd8 · dbf3cd8
1 parent c2db37a
commit dbf3cd8
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Showing 3 changed files with 22 additions and 1 deletion.
diff --git a/arch/arm64/boot/dts/rockchip/overlay/Makefile b/arch/arm64/boot/dts/rockchip/overlay/Makefile
@@ -11,7 +11,8 @@ dtbo-$(CONFIG_ARCH_ROCKCHIP) += \
 	rockchip-uart4.dtbo \
 	rockchip-dwc3-0-host.dtbo \
 	rockchip-w1-gpio.dtbo \
-	rockchip-rk3318-box-led-conf1.dtbo
+	rockchip-rk3318-box-led-conf1.dtbo \
+	rockchip-rk3318-box-emmc-ddr.dtbo
 
 scr-$(CONFIG_ARCH_ROCKCHIP) += \
        rockchip-fixup.scr

diff --git a/arch/arm64/boot/dts/rockchip/overlay/README.rockchip-overlays b/arch/arm64/boot/dts/rockchip/overlay/README.rockchip-overlays
@@ -123,3 +123,9 @@ or enabling the internal pull-up
 
 Activates led/gpio configuration for rk3318 tv box boards with signature
 YX_RK3328 and clones
+
+### rk3318-box-emmc-ddr
+
+Activates eMMC DDR capability for rk3318 tv box boards. Probably all the eMMC chips
+nowadays support DDR mode, but its reliability heavily depends upon the quality
+of board wiring
diff --git a/arch/arm64/boot/dts/rockchip/overlay/rockchip-rk3318-box-emmc-ddr.dts b/arch/arm64/boot/dts/rockchip/overlay/rockchip-rk3318-box-emmc-ddr.dts
@@ -0,0 +1,14 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+
+	fragment@0 {
+		target = <&emmc>;
+		__overlay__ {
+			status = "okay";
+			mmc-ddr-1_8v;
+		};
+	};
+
+};