Why did AMD change the name of the open source driver from Radeon to AMDGPU?

When I was looking into R9 290x I found that it’s supported in Radeon open source driver, but not AMDGPU (which I’ll need for my 6900 XT/6800 XT).

I know that part. I was referring to the driver name.

they didn’t change the name, its a different driver. the “radeon” driver is still there for older parts.