TMP100: How to configure device tree for I2C1 for Temperature Reading

ls -l /sys/bus/i2c/devices/0-0048/
total 0
-r--r--r-- 1 root root 4096 Oct 10 15:47 modalias
-r--r--r-- 1 root root 4096 Oct 10 15:43 name
lrwxrwxrwx 1 root root 0 Oct 10 15:47 of_node -> ../../../../../../firmware/devicetree/base/bus@f0000/i2c@20010000/tmp100@48
drwxr-xr-x 2 root root 0 Oct 10 15:47 power
lrwxrwxrwx 1 root root 0 Feb 24 2023 subsystem -> ../../../../../../bus/i2c
lrwxrwxrwx 1 root root 0 Oct 10 15:47 supplier:platform:regulator-2 -> ../../../../../virtual/devlink/platform:regulator-2--i2c:0-0048
-rw-r--r-- 1 root root 4096 Feb 24 2023 uevent
root@am62xx-evm:~#

If you're trying to use the hwmon lm75 driver in the linux mainline, it should expose it's output through /sys/class/hwmon when properly initialized. I found the following post helpful in testing the lm75 driver on a TMP100 device connected to a Raspberry Pi: https://forums.raspberrypi.com/viewtopic.php?t=347854 

thanks,

ren

I am using tmp100 but unable to read temperature from the driver. 

Hi Mitesh,

I'm sorry to hear you are having trouble. Do you have any questions about the TMP100 device that I can assist you with?

thanks,

ren

Hi Ren, would you be able to tell me what should be the changes in device tree for TMP100 and how to read the temperature using TMP100 on Linux?

Thanks 

Hi ren, sorry for the delay. this is what we have in our device tree:

&main_i2c1 {
tempSensor: tmp100@48 {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
compatible = "ti,tmp100";
reg = <0x48>;
vs-supply = <&vcc_3v3_sys>;
};
};

Hi Mitesh,

Sorry, I'm not an expert on devicetree. 

ren