1*e67e8565SEmmanuel Vadot# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2*e67e8565SEmmanuel Vadot%YAML 1.2 3*e67e8565SEmmanuel Vadot--- 4*e67e8565SEmmanuel Vadot$id: http://devicetree.org/schemas/i2c/nvidia,tegra186-bpmp-i2c.yaml# 5*e67e8565SEmmanuel Vadot$schema: http://devicetree.org/meta-schemas/core.yaml# 6*e67e8565SEmmanuel Vadot 7*e67e8565SEmmanuel Vadottitle: NVIDIA Tegra186 (and later) BPMP I2C controller 8*e67e8565SEmmanuel Vadot 9*e67e8565SEmmanuel Vadotmaintainers: 10*e67e8565SEmmanuel Vadot - Thierry Reding <thierry.reding@gmail.com> 11*e67e8565SEmmanuel Vadot - Jon Hunter <jonathanh@nvidia.com> 12*e67e8565SEmmanuel Vadot 13*e67e8565SEmmanuel Vadotdescription: | 14*e67e8565SEmmanuel Vadot In Tegra186 and later, the BPMP (Boot and Power Management Processor) 15*e67e8565SEmmanuel Vadot owns certain HW devices, such as the I2C controller for the power 16*e67e8565SEmmanuel Vadot management I2C bus. Software running on other CPUs must perform IPC to 17*e67e8565SEmmanuel Vadot the BPMP in order to execute transactions on that I2C bus. This 18*e67e8565SEmmanuel Vadot binding describes an I2C bus that is accessed in such a fashion. 19*e67e8565SEmmanuel Vadot 20*e67e8565SEmmanuel Vadot The BPMP I2C node must be located directly inside the main BPMP node. 21*e67e8565SEmmanuel Vadot See ../firmware/nvidia,tegra186-bpmp.yaml for details of the BPMP 22*e67e8565SEmmanuel Vadot binding. 23*e67e8565SEmmanuel Vadot 24*e67e8565SEmmanuel Vadot This node represents an I2C controller. See ../i2c/i2c.txt for details 25*e67e8565SEmmanuel Vadot of the core I2C binding. 26*e67e8565SEmmanuel Vadot 27*e67e8565SEmmanuel Vadotproperties: 28*e67e8565SEmmanuel Vadot compatible: 29*e67e8565SEmmanuel Vadot const: nvidia,tegra186-bpmp-i2c 30*e67e8565SEmmanuel Vadot 31*e67e8565SEmmanuel Vadot nvidia,bpmp-bus-id: 32*e67e8565SEmmanuel Vadot $ref: /schemas/types.yaml#/definitions/uint32 33*e67e8565SEmmanuel Vadot description: Indicates the I2C bus number this DT node represents, 34*e67e8565SEmmanuel Vadot as defined by the BPMP firmware. 35*e67e8565SEmmanuel Vadot 36*e67e8565SEmmanuel VadotallOf: 37*e67e8565SEmmanuel Vadot - $ref: /schemas/i2c/i2c-controller.yaml 38*e67e8565SEmmanuel Vadot 39*e67e8565SEmmanuel VadotunevaluatedProperties: false 40*e67e8565SEmmanuel Vadot 41*e67e8565SEmmanuel Vadotrequired: 42*e67e8565SEmmanuel Vadot - compatible 43*e67e8565SEmmanuel Vadot - "#address-cells" 44*e67e8565SEmmanuel Vadot - "#size-cells" 45*e67e8565SEmmanuel Vadot - nvidia,bpmp-bus-id 46