[snip]

quoted

+     "st,stm32-iio-timer5"
+     "st,stm32-iio-timer6"
+     "st,stm32-iio-timer7"
+     "st,stm32-iio-timer8"
+     "st,stm32-iio-timer9"
+     "st,stm32-iio-timer10"
+     "st,stm32-iio-timer11"
+     "st,stm32-iio-timer12"
+     "st,stm32-iio-timer13"
+     "st,stm32-iio-timer14"

We can't do this. This is a binding for a driver, not for the hardware.

Unfortunately each instance for the hardware IP have little
differences like which triggers they could accept or size of the
counter register,
and I doesn't have value inside the hardware to distinguish them so
the only way I found is to use compatible.