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author | Tom Rini <trini@konsulko.com> | 2016-08-05 14:09:15 -0400 |
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committer | Tom Rini <trini@konsulko.com> | 2016-08-05 20:55:30 -0400 |
commit | 7edb17670cdca0ee5de8b8eb61753ad6b7fc33e6 (patch) | |
tree | 33e0817d373a2db9fa3d91d8904cd6f8bbf807fa /doc/device-tree-bindings/i2c/nvidia,tegra186-bpmp-i2c.txt | |
parent | a60d94b204412732409e70cb15236bd96d4da7d9 (diff) | |
parent | cb0ff4ccc039435bef627883ade3e3911805cec5 (diff) | |
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Merge branch 'master' of git://git.denx.de/u-boot-tegra
Diffstat (limited to 'doc/device-tree-bindings/i2c/nvidia,tegra186-bpmp-i2c.txt')
-rw-r--r-- | doc/device-tree-bindings/i2c/nvidia,tegra186-bpmp-i2c.txt | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/i2c/nvidia,tegra186-bpmp-i2c.txt b/doc/device-tree-bindings/i2c/nvidia,tegra186-bpmp-i2c.txt new file mode 100644 index 0000000..ab240e1 --- /dev/null +++ b/doc/device-tree-bindings/i2c/nvidia,tegra186-bpmp-i2c.txt @@ -0,0 +1,42 @@ +NVIDIA Tegra186 BPMP I2C controller + +In Tegra186, the BPMP (Boot and Power Management Processor) owns certain HW +devices, such as the I2C controller for the power management I2C bus. Software +running on other CPUs must perform IPC to the BPMP in order to execute +transactions on that I2C bus. This binding describes an I2C bus that is +accessed in such a fashion. + +The BPMP I2C node must be located directly inside the main BPMP node. See +../firmware/nvidia,tegra186-bpmp.txt for details of the BPMP binding. + +This node represents an I2C controller. See ../i2c/i2c.txt for details of the +core I2C binding. + +Required properties: +- compatible: + Array of strings. + One of: + - "nvidia,tegra186-bpmp-i2c". +- #address-cells: Address cells for I2C device address. + Single-cell integer. + Must be <1>. +- #size-cells: + Single-cell integer. + Must be <0>. +- nvidia,bpmp-bus-id: + Single-cell integer. + Indicates the I2C bus number this DT node represent, as defined by the + BPMP firmware. + +Example: + +bpmp { + ... + + i2c { + compatible = "nvidia,tegra186-bpmp-i2c"; + #address-cells = <1>; + #size-cells = <0>; + nvidia,bpmp-bus-id = <5>; + }; +}; |