Tools to assist organizations validate their PCI DSS compliance include Self Assessment Questionnaires. The chart linked here shows some of the tools available to help organizations become PCI DSS-compliant.
For device vendors and manufacturers, the Council provides the PIN Transaction Security (PTS) requirements, which contains a single set of requirements for all personal identification number (PIN) terminals, including POS devices, encrypting PIN pads and unattended payment terminals. A list of approved PIN transaction devices can be accessed here.