162306a36Sopenharmony_ci# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 262306a36Sopenharmony_ci%YAML 1.2 362306a36Sopenharmony_ci--- 462306a36Sopenharmony_ci$id: http://devicetree.org/schemas/i2c/nvidia,tegra186-bpmp-i2c.yaml# 562306a36Sopenharmony_ci$schema: http://devicetree.org/meta-schemas/core.yaml# 662306a36Sopenharmony_ci 762306a36Sopenharmony_cititle: NVIDIA Tegra186 (and later) BPMP I2C controller 862306a36Sopenharmony_ci 962306a36Sopenharmony_cimaintainers: 1062306a36Sopenharmony_ci - Thierry Reding <thierry.reding@gmail.com> 1162306a36Sopenharmony_ci - Jon Hunter <jonathanh@nvidia.com> 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_cidescription: | 1462306a36Sopenharmony_ci In Tegra186 and later, the BPMP (Boot and Power Management Processor) 1562306a36Sopenharmony_ci owns certain HW devices, such as the I2C controller for the power 1662306a36Sopenharmony_ci management I2C bus. Software running on other CPUs must perform IPC to 1762306a36Sopenharmony_ci the BPMP in order to execute transactions on that I2C bus. This 1862306a36Sopenharmony_ci binding describes an I2C bus that is accessed in such a fashion. 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_ci The BPMP I2C node must be located directly inside the main BPMP node. 2162306a36Sopenharmony_ci See ../firmware/nvidia,tegra186-bpmp.yaml for details of the BPMP 2262306a36Sopenharmony_ci binding. 2362306a36Sopenharmony_ci 2462306a36Sopenharmony_ci This node represents an I2C controller. See ../i2c/i2c.txt for details 2562306a36Sopenharmony_ci of the core I2C binding. 2662306a36Sopenharmony_ci 2762306a36Sopenharmony_ciproperties: 2862306a36Sopenharmony_ci compatible: 2962306a36Sopenharmony_ci const: nvidia,tegra186-bpmp-i2c 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_ci nvidia,bpmp-bus-id: 3262306a36Sopenharmony_ci $ref: /schemas/types.yaml#/definitions/uint32 3362306a36Sopenharmony_ci description: Indicates the I2C bus number this DT node represents, 3462306a36Sopenharmony_ci as defined by the BPMP firmware. 3562306a36Sopenharmony_ci 3662306a36Sopenharmony_ciallOf: 3762306a36Sopenharmony_ci - $ref: /schemas/i2c/i2c-controller.yaml 3862306a36Sopenharmony_ci 3962306a36Sopenharmony_ciunevaluatedProperties: false 4062306a36Sopenharmony_ci 4162306a36Sopenharmony_cirequired: 4262306a36Sopenharmony_ci - compatible 4362306a36Sopenharmony_ci - "#address-cells" 4462306a36Sopenharmony_ci - "#size-cells" 4562306a36Sopenharmony_ci - nvidia,bpmp-bus-id 46