[PATCH 8/8] arm64: dts: allwinner: orangepi-zero2: Add i2c aliases

[Arun Iyengar via B4 Relay <devnull+aiyengar1990.gmail.com@kernel.org>]

From: Arun Iyengar <aiyengar1990@gmail.com>

The I2C core numbers adapters after the "i2cN" aliases and hands out
dynamic numbers, in probe order, to adapters without one. The Orange Pi
Zero2 DT has no i2c aliases, so a TWI controller enabled by an overlay
for the header pins gets whatever number is free when it probes: TWI3
on header pins 3 and 5 does not show up as /dev/i2c-3, and the number
changes with the set of enabled buses. The vendor manual and the
vendor BSP name the buses after the controller.

Pin the numbering as the vendor BSP does: i2c0 to i2c4 are TWI0 to
TWI4, i2c5 is R_TWI. Disabled controllers get no adapter, so nothing
changes for buses that stay off.

Signed-off-by: Arun Iyengar <aiyengar1990@gmail.com>
---
 arch/arm64/boot/dts/allwinner/sun50i-h616-orangepi-zero2.dts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616-orangepi-zero2.dts b/arch/arm64/boot/dts/allwinner/sun50i-h616-orangepi-zero2.dts
index d5d39bac5915..98fc83291dc8 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h616-orangepi-zero2.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h616-orangepi-zero2.dts
@@ -12,6 +12,15 @@
 / {
 	model = "OrangePi Zero2";
 	compatible = "xunlong,orangepi-zero2", "allwinner,sun50i-h616";
+
+	aliases {
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
+		i2c2 = &i2c2;
+		i2c3 = &i2c3;
+		i2c4 = &i2c4;
+		i2c5 = &r_i2c;
+	};
 };
 
 &cpu0 {

-- 
2.55.0