1*c66ec88fSEmmanuel Vadot 2*c66ec88fSEmmanuel Vadotppc476gtr High Speed Serial Assist (HSTA) node 3*c66ec88fSEmmanuel Vadot============================================== 4*c66ec88fSEmmanuel Vadot 5*c66ec88fSEmmanuel VadotThe 476gtr SoC contains a high speed serial assist module attached 6*c66ec88fSEmmanuel Vadotbetween the plb4 and plb6 system buses to provide high speed data 7*c66ec88fSEmmanuel Vadottransfer between memory and system peripherals as well as support for 8*c66ec88fSEmmanuel VadotPCI message signalled interrupts. 9*c66ec88fSEmmanuel Vadot 10*c66ec88fSEmmanuel VadotCurrently only the MSI support is used by Linux using the following 11*c66ec88fSEmmanuel Vadotdevice tree entries: 12*c66ec88fSEmmanuel Vadot 13*c66ec88fSEmmanuel VadotRequire properties: 14*c66ec88fSEmmanuel Vadot- compatible : "ibm,476gtr-hsta-msi", "ibm,hsta-msi" 15*c66ec88fSEmmanuel Vadot- reg : register mapping for the HSTA MSI space 16*c66ec88fSEmmanuel Vadot- interrupts : ordered interrupt mapping for each MSI in the register 17*c66ec88fSEmmanuel Vadot space. The first interrupt should be associated with a 18*c66ec88fSEmmanuel Vadot register offset of 0x00, the second to 0x10, etc. 19