1*4882a593Smuzhiyun 2*4882a593Smuzhiyunppc476gtr High Speed Serial Assist (HSTA) node 3*4882a593Smuzhiyun============================================== 4*4882a593Smuzhiyun 5*4882a593SmuzhiyunThe 476gtr SoC contains a high speed serial assist module attached 6*4882a593Smuzhiyunbetween the plb4 and plb6 system buses to provide high speed data 7*4882a593Smuzhiyuntransfer between memory and system peripherals as well as support for 8*4882a593SmuzhiyunPCI message signalled interrupts. 9*4882a593Smuzhiyun 10*4882a593SmuzhiyunCurrently only the MSI support is used by Linux using the following 11*4882a593Smuzhiyundevice tree entries: 12*4882a593Smuzhiyun 13*4882a593SmuzhiyunRequire properties: 14*4882a593Smuzhiyun- compatible : "ibm,476gtr-hsta-msi", "ibm,hsta-msi" 15*4882a593Smuzhiyun- reg : register mapping for the HSTA MSI space 16*4882a593Smuzhiyun- interrupts : ordered interrupt mapping for each MSI in the register 17*4882a593Smuzhiyun space. The first interrupt should be associated with a 18*4882a593Smuzhiyun register offset of 0x00, the second to 0x10, etc. 19