From 3b6c8e0b83c1b0f96a6136e2d6b25c63cbf75044 Mon Sep 17 00:00:00 2001
From: Alan <tech@biqu3d.com>
Date: Tue, 8 Aug 2023 14:57:29 +0800
Subject: [PATCH] add i2c0(PI5&PI6) overlay

---
 .../arm64/boot/dts/allwinner/overlay/Makefile |  1 +
 .../allwinner/overlay/sun50i-h616-i2c0.dts    | 20 +++++++++++++++++++
 .../arm64/boot/dts/allwinner/sun50i-h616.dtsi |  1 +
 userpatches/sunxi.txt                         |  5 ++++-
 4 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100755 kernel/arch/arm64/boot/dts/allwinner/overlay/sun50i-h616-i2c0.dts

diff --git a/kernel/arch/arm64/boot/dts/allwinner/overlay/Makefile b/kernel/arch/arm64/boot/dts/allwinner/overlay/Makefile
index 1897e9e12b..c591d7e4a8 100644
--- a/kernel/arch/arm64/boot/dts/allwinner/overlay/Makefile
+++ b/kernel/arch/arm64/boot/dts/allwinner/overlay/Makefile
@@ -9,6 +9,7 @@ dtbo-$(CONFIG_ARCH_SUNXI) += \
 	sun50i-h616-spidev1_0.dtbo \
 	sun50i-h616-spidev1_1.dtbo \
 	sun50i-h616-spidev1_2.dtbo \
+	sun50i-h616-i2c0.dtbo\
 	sun50i-h616-ir.dtbo \
 	sun50i-h616-tft35_spi.dtbo \
 	sun50i-h616-tft35_spi25.dtbo \
diff --git a/kernel/arch/arm64/boot/dts/allwinner/overlay/sun50i-h616-i2c0.dts b/kernel/arch/arm64/boot/dts/allwinner/overlay/sun50i-h616-i2c0.dts
new file mode 100755
index 0000000000..11a7b7f6b9
--- /dev/null
+++ b/kernel/arch/arm64/boot/dts/allwinner/overlay/sun50i-h616-i2c0.dts
@@ -0,0 +1,20 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "allwinner,sun50i-h616";
+
+	fragment@0 {
+		target-path = "/aliases";
+		__overlay__ {
+			i2c0 = "/soc/i2c@5002000";
+		};
+	};
+
+	fragment@1 {
+		target = <&i2c0>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+};
diff --git a/kernel/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi b/kernel/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
index 061c66d9ce..7446101ec7 100755
--- a/kernel/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
+++ b/kernel/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
@@ -335,6 +335,7 @@
 			i2c0_pins: i2c0-pins {
 				pins = "PI5", "PI6";
 				function = "i2c0";
+				bias-pull-up;
 			};
 
 			i2c1_pins: i2c1-pins {
diff --git a/userpatches/sunxi.txt b/userpatches/sunxi.txt
index 3b4c252856..9b616ab583 100644
--- a/userpatches/sunxi.txt
+++ b/userpatches/sunxi.txt
@@ -22,6 +22,9 @@ console=display
 ## uncomment MCP2515 spi to canbus module
 #overlays=mcp2515
 
+## uncomment to release 'spidev0.0' to user space
+#overlays=i2c0
+
 ## uncomment to release 'spidev0.0' to user space
 #overlays=spidev0_0
 
@@ -38,6 +41,6 @@ console=display
 #overlays=ir
 
 ## write the config after the 'overlays' and separate it with a space when multiple functions are enabled
-#overlays=disable_uart0 pwm ws2812 light tft35_spi mcp2515 spidev0_0 spidev1_0 spidev1_1 spidev1_2 ir
+#overlays=disable_uart0 pwm ws2812 light tft35_spi mcp2515 i2c0 spidev0_0 spidev1_0 spidev1_1 spidev1_2 ir
 
 #------------------------------------------------#