Certified GKH Gardening Expert
Unless you know that the soil is extremely acidic, then you will NOT want to use this for raspberries. This will bring the soil pH up to unsafe levels, as there is quite a bit of chalk in mushroom compost.
This will be used for plants with a much higher pH requirement.
This article will help you with the care of raspberries: https://www.gardeningknowhow.com/edible/fruits/raspberry/care-of-raspberry-plants.htm