1*c66ec88fSEmmanuel VadotNVIDIA Tegra210 Boot and Power Management Processor (BPMP) 2*c66ec88fSEmmanuel Vadot 3*c66ec88fSEmmanuel VadotThe Boot and Power Management Processor (BPMP) is a co-processor found 4*c66ec88fSEmmanuel Vadotin Tegra210 SoC. It is designed to handle the early stages of the boot 5*c66ec88fSEmmanuel Vadotprocess as well as to assisting in entering deep low power state 6*c66ec88fSEmmanuel Vadot(suspend to ram), and also offloading DRAM memory clock scaling on 7*c66ec88fSEmmanuel Vadotsome platforms. The binding document defines the resources that would 8*c66ec88fSEmmanuel Vadotbe used by the BPMP T210 firmware driver, which can create the 9*c66ec88fSEmmanuel Vadotinterprocessor communication (IPC) between the CPU and BPMP. 10*c66ec88fSEmmanuel Vadot 11*c66ec88fSEmmanuel VadotRequired properties: 12*c66ec88fSEmmanuel Vadot- compatible 13*c66ec88fSEmmanuel Vadot Array of strings 14*c66ec88fSEmmanuel Vadot One of: 15*c66ec88fSEmmanuel Vadot - "nvidia,tegra210-bpmp" 16*c66ec88fSEmmanuel Vadot- reg: physical base address and length for HW synchornization primitives 17*c66ec88fSEmmanuel Vadot 1) base address and length to Tegra 'atomics' hardware 18*c66ec88fSEmmanuel Vadot 2) base address and length to Tegra 'semaphore' hardware 19*c66ec88fSEmmanuel Vadot- interrupts: specifies the interrupt number for receiving messages ("rx") 20*c66ec88fSEmmanuel Vadot and for triggering messages ("tx") 21*c66ec88fSEmmanuel Vadot 22*c66ec88fSEmmanuel VadotOptional properties: 23*c66ec88fSEmmanuel Vadot- #clock-cells : Should be 1 for platforms where DRAM clock control is 24*c66ec88fSEmmanuel Vadot offloaded to bpmp. 25*c66ec88fSEmmanuel Vadot 26*c66ec88fSEmmanuel VadotExample: 27*c66ec88fSEmmanuel Vadot 28*c66ec88fSEmmanuel Vadotbpmp@70016000 { 29*c66ec88fSEmmanuel Vadot compatible = "nvidia,tegra210-bpmp"; 30*c66ec88fSEmmanuel Vadot reg = <0x0 0x70016000 0x0 0x2000 31*c66ec88fSEmmanuel Vadot 0x0 0x60001000 0x0 0x1000>; 32*c66ec88fSEmmanuel Vadot interrupts = <GIC_SPI 6 IRQ_TYPE_EDGE_RISING>, 33*c66ec88fSEmmanuel Vadot <GIC_SPI 4 IRQ_TYPE_EDGE_RISING>; 34*c66ec88fSEmmanuel Vadot interrupt-names = "tx", "rx"; 35*c66ec88fSEmmanuel Vadot}; 36