1*c66ec88fSEmmanuel VadotThe APM X-Gene SLIMpro mailbox is used to communicate messages between 2*c66ec88fSEmmanuel Vadotthe ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple 3*c66ec88fSEmmanuel Vadotinterrupt based door bell mechanism and can exchange simple messages using the 4*c66ec88fSEmmanuel Vadotinternal registers. 5*c66ec88fSEmmanuel Vadot 6*c66ec88fSEmmanuel VadotThere are total of 8 interrupts in this mailbox. Each used for an individual 7*c66ec88fSEmmanuel Vadotdoor bell (or mailbox channel). 8*c66ec88fSEmmanuel Vadot 9*c66ec88fSEmmanuel VadotRequired properties: 10*c66ec88fSEmmanuel Vadot- compatible: Should be as "apm,xgene-slimpro-mbox". 11*c66ec88fSEmmanuel Vadot 12*c66ec88fSEmmanuel Vadot- reg: Contains the mailbox register address range. 13*c66ec88fSEmmanuel Vadot 14*c66ec88fSEmmanuel Vadot- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the 15*c66ec88fSEmmanuel Vadot the interrupt for mailbox channel 0 and interrupt 1 for 16*c66ec88fSEmmanuel Vadot mailbox channel 1 and so likewise for the reminder. 17*c66ec88fSEmmanuel Vadot 18*c66ec88fSEmmanuel Vadot- #mbox-cells: only one to specify the mailbox channel number. 19*c66ec88fSEmmanuel Vadot 20*c66ec88fSEmmanuel VadotExample: 21*c66ec88fSEmmanuel Vadot 22*c66ec88fSEmmanuel VadotMailbox Node: 23*c66ec88fSEmmanuel Vadot mailbox: mailbox@10540000 { 24*c66ec88fSEmmanuel Vadot compatible = "apm,xgene-slimpro-mbox"; 25*c66ec88fSEmmanuel Vadot reg = <0x0 0x10540000 0x0 0xa000>; 26*c66ec88fSEmmanuel Vadot #mbox-cells = <1>; 27*c66ec88fSEmmanuel Vadot interrupts = <0x0 0x0 0x4>, 28*c66ec88fSEmmanuel Vadot <0x0 0x1 0x4>, 29*c66ec88fSEmmanuel Vadot <0x0 0x2 0x4>, 30*c66ec88fSEmmanuel Vadot <0x0 0x3 0x4>, 31*c66ec88fSEmmanuel Vadot <0x0 0x4 0x4>, 32*c66ec88fSEmmanuel Vadot <0x0 0x5 0x4>, 33*c66ec88fSEmmanuel Vadot <0x0 0x6 0x4>, 34*c66ec88fSEmmanuel Vadot <0x0 0x7 0x4>, 35*c66ec88fSEmmanuel Vadot }; 36