I had some time to verify this.
I installed a new image using Raspberry Pi Imager, On reboot I updated all the software packages and rebooted. When I look for the humirdity1_input files:
Notice that the humidity1_input file has a parent directory of hwmon1.
I follow the steps to build a kernel from source using the bcm2711_defconfig
I then installed the kernel and modules and dtb's and boot that kernel. I look for the humidity1_input:
Notice that now the humidity1_input has a parent directory of hwmon2 where previously it's parent directory was hwmon1.
It doesn't seem to change at each boot but when the kernel changes the parent directory can change.
I guess I'll have to have my app check for the directory in the /sys/devices/platform/soc/3f804000.i2c/i2c-1/1-0044/hwmon/ and then use that value to construct the path name to the humidity1_input file.
Thanks
Chris
I installed a new image using Raspberry Pi Imager, On reboot I updated all the software packages and rebooted. When I look for the humirdity1_input files:
Code:
$ find /sys -name humidity1_input 2>/dev/null/sys/devices/platform/soc/3f804000.i2c/i2c-1/1-0044/hwmon/hwmon1/humidity1_inputI follow the steps to build a kernel from source using the bcm2711_defconfig
Code:
$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- bcm2711_defconfig$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- Image modules dtbs<bunch of stuff>Code:
$ find /sys -name humidity1_input 2>/dev/null/sys/devices/platform/soc/3f804000.i2c/i2c-1/1-0044/hwmon/hwmon2/humidity1_inputIt doesn't seem to change at each boot but when the kernel changes the parent directory can change.
I guess I'll have to have my app check for the directory in the /sys/devices/platform/soc/3f804000.i2c/i2c-1/1-0044/hwmon/ and then use that value to construct the path name to the humidity1_input file.
Thanks
Chris
Statistics: Posted by chriskot870 — Wed Sep 04, 2024 11:05 pm