Hwo to add i2c devices in dts for ipq806x router

[Amadeus]

Hi, I have an ipq806x router with pcf8563 and lm75 sensors on it.
From the original firmware startup log:

[    0.655232] usbcore: registered new interface driver cdc_wdm
[    0.655763] usbcore: registered new interface driver usbserial
[    0.656044] usbcore: registered new interface driver usbserial_generic
[    0.656263] USB Serial support registered for generic
[    0.656294] usbserial: USB Serial Driver core
[    0.658700] rtc-pcf8563 1-0051: low voltage detected, date/time is not reliable.
[    0.658700] rtc-pcf8563 1-0051: chip found, driver version 0.4.3
[    0.660262] rtc-pcf8563 1-0051: low voltage detected, date/time is not reliable.
[    0.660699] rtc-pcf8563 1-0051: rtc core: registered rtc-pcf8563 as rtc0
[    0.660918] i2c /dev entries driver
[    0.661730] i2c-core: driver [adc121c021_i2c_drvr] using legacy suspend method
[    0.661730] i2c-core: driver [adc121c021_i2c_drvr] using legacy resume method
[    0.662605] lm75 1-0048: hwmon0: sensor 'lm75'

I guess probably write in device tree like this:

	lm75@48 {
		status = "okay";
		compatible = "lm75";
		reg = <0x48>;
	};

	pcf8563: rtc@51 {
		status = "okay";
		compatible = "nxp,pcf8563";
		reg = <0x51>;
	};

But I don't know where to add this code in dts for ipq806x.

[123serge123]

Start with enabling i2c controller(s) in the dts-file for your device and installing kmod-i2c-core i2c-tools packages.

[Amadeus]

Thank you for your guidance, but I don't konw how to enable i2c controller in dts for ipq806x, I try to write from other target devices' dts, and it does not appear on the startup log with "Failed to open rtc device".

[123serge123]

Unused controllers have status "disabled", change to "okay".
Example:

			i2c@124a0000 {
				compatible = "qcom,i2c-qup-v1.1.1";
				reg = <0x124a0000 0x1000>;
				interrupts = <GIC_SPI 196 IRQ_TYPE_LEVEL_HIGH>;

				clocks = <&gcc GSBI2_QUP_CLK>, <&gcc GSBI2_H_CLK>;
				clock-names = "core", "iface";
				status = "disabled";

				#address-cells = <1>;
				#size-cells = <0>;
			};

[Amadeus]

Thank you very much.