18c2ecf20Sopenharmony_ci 28c2ecf20Sopenharmony_cippc476gtr High Speed Serial Assist (HSTA) node 38c2ecf20Sopenharmony_ci============================================== 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ciThe 476gtr SoC contains a high speed serial assist module attached 68c2ecf20Sopenharmony_cibetween the plb4 and plb6 system buses to provide high speed data 78c2ecf20Sopenharmony_citransfer between memory and system peripherals as well as support for 88c2ecf20Sopenharmony_ciPCI message signalled interrupts. 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ciCurrently only the MSI support is used by Linux using the following 118c2ecf20Sopenharmony_cidevice tree entries: 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ciRequire properties: 148c2ecf20Sopenharmony_ci- compatible : "ibm,476gtr-hsta-msi", "ibm,hsta-msi" 158c2ecf20Sopenharmony_ci- reg : register mapping for the HSTA MSI space 168c2ecf20Sopenharmony_ci- interrupts : ordered interrupt mapping for each MSI in the register 178c2ecf20Sopenharmony_ci space. The first interrupt should be associated with a 188c2ecf20Sopenharmony_ci register offset of 0x00, the second to 0x10, etc. 19