1*4882a593Smuzhiyun 2*4882a593SmuzhiyunIBM Akebono board device tree 3*4882a593Smuzhiyun============================= 4*4882a593Smuzhiyun 5*4882a593SmuzhiyunThe IBM Akebono board is a development board for the PPC476GTR SoC. 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun0) The root node 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun Required properties: 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun - model : "ibm,akebono". 12*4882a593Smuzhiyun - compatible : "ibm,akebono" , "ibm,476gtr". 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun1.a) The Secure Digital Host Controller Interface (SDHCI) node 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun Represent the Secure Digital Host Controller Interfaces. 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun Required properties: 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun - compatible : should be "ibm,476gtr-sdhci","generic-sdhci". 21*4882a593Smuzhiyun - reg : should contain the SDHCI registers location and length. 22*4882a593Smuzhiyun - interrupts : should contain the SDHCI interrupt. 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun1.b) The Advanced Host Controller Interface (AHCI) SATA node 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun Represents the advanced host controller SATA interface. 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun Required properties: 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun - compatible : should be "ibm,476gtr-ahci". 31*4882a593Smuzhiyun - reg : should contain the AHCI registers location and length. 32*4882a593Smuzhiyun - interrupts : should contain the AHCI interrupt. 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun1.c) The FPGA node 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun The Akebono board stores some board information such as the revision 37*4882a593Smuzhiyun number in an FPGA which is represented by this node. 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun Required properties: 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun - compatible : should be "ibm,akebono-fpga". 42*4882a593Smuzhiyun - reg : should contain the FPGA registers location and length. 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun1.d) The AVR node 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun The Akebono board has an Atmel AVR microprocessor attached to the I2C 47*4882a593Smuzhiyun bus as a power controller for the board. 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun Required properties: 50*4882a593Smuzhiyun 51*4882a593Smuzhiyun - compatible : should be "ibm,akebono-avr". 52*4882a593Smuzhiyun - reg : should contain the I2C bus address for the AVR. 53