1*c66ec88fSEmmanuel VadotNVIDIA Tegra186 BPMP I2C controller 2*c66ec88fSEmmanuel Vadot 3*c66ec88fSEmmanuel VadotIn Tegra186, the BPMP (Boot and Power Management Processor) owns certain HW 4*c66ec88fSEmmanuel Vadotdevices, such as the I2C controller for the power management I2C bus. Software 5*c66ec88fSEmmanuel Vadotrunning on other CPUs must perform IPC to the BPMP in order to execute 6*c66ec88fSEmmanuel Vadottransactions on that I2C bus. This binding describes an I2C bus that is 7*c66ec88fSEmmanuel Vadotaccessed in such a fashion. 8*c66ec88fSEmmanuel Vadot 9*c66ec88fSEmmanuel VadotThe BPMP I2C node must be located directly inside the main BPMP node. See 10*c66ec88fSEmmanuel Vadot../firmware/nvidia,tegra186-bpmp.txt for details of the BPMP binding. 11*c66ec88fSEmmanuel Vadot 12*c66ec88fSEmmanuel VadotThis node represents an I2C controller. See ../i2c/i2c.txt for details of the 13*c66ec88fSEmmanuel Vadotcore I2C binding. 14*c66ec88fSEmmanuel Vadot 15*c66ec88fSEmmanuel VadotRequired properties: 16*c66ec88fSEmmanuel Vadot- compatible: 17*c66ec88fSEmmanuel Vadot Array of strings. 18*c66ec88fSEmmanuel Vadot One of: 19*c66ec88fSEmmanuel Vadot - "nvidia,tegra186-bpmp-i2c". 20*c66ec88fSEmmanuel Vadot- #address-cells: Address cells for I2C device address. 21*c66ec88fSEmmanuel Vadot Single-cell integer. 22*c66ec88fSEmmanuel Vadot Must be <1>. 23*c66ec88fSEmmanuel Vadot- #size-cells: 24*c66ec88fSEmmanuel Vadot Single-cell integer. 25*c66ec88fSEmmanuel Vadot Must be <0>. 26*c66ec88fSEmmanuel Vadot- nvidia,bpmp-bus-id: 27*c66ec88fSEmmanuel Vadot Single-cell integer. 28*c66ec88fSEmmanuel Vadot Indicates the I2C bus number this DT node represent, as defined by the 29*c66ec88fSEmmanuel Vadot BPMP firmware. 30*c66ec88fSEmmanuel Vadot 31*c66ec88fSEmmanuel VadotExample: 32*c66ec88fSEmmanuel Vadot 33*c66ec88fSEmmanuel Vadotbpmp { 34*c66ec88fSEmmanuel Vadot ... 35*c66ec88fSEmmanuel Vadot 36*c66ec88fSEmmanuel Vadot i2c { 37*c66ec88fSEmmanuel Vadot compatible = "nvidia,tegra186-bpmp-i2c"; 38*c66ec88fSEmmanuel Vadot #address-cells = <1>; 39*c66ec88fSEmmanuel Vadot #size-cells = <0>; 40*c66ec88fSEmmanuel Vadot nvidia,bpmp-bus-id = <5>; 41*c66ec88fSEmmanuel Vadot }; 42*c66ec88fSEmmanuel Vadot}; 43