I noticed my RV530 get "upgraded" by mesa to a R580:
GL_RENDERER   = Gallium 0.4 on ATI R580

Up to some days ago it was correctly reported as a RV530. Possible regression
of
http://cgit.freedesktop.org/mesa/mesa/commit/?id=ca474f98f2cda5cb333e9f851c7e0e31c9a6f823

Priority	medium
Bug ID	59169
Assignee	dri-devel@lists.freedesktop.org
Summary	[radeons] wrong chip detection
Severity	normal
Classification	Unclassified
OS	Linux (All)
Reporter	fabio.ped@libero.it
Hardware	x86 (IA32)
Status	NEW
Version	git
Component	Drivers/Gallium/r300
Product	Mesa