21 lines
1.0 KiB
Plaintext
21 lines
1.0 KiB
Plaintext
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This directory contains the i2c-pseudo Linux kernel module.
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The i2c-pseudo module was written with the intention of being submitted upstream
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in the Linux kernel. This copy exists because of as 2019-03 this module is not
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yet in the upstream kernel, and even if/when this is included, it may take years
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before making its way to the prepackaged Linux distribution kernels typically
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used by CrOS developers.
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See Documentation.txt for more information about the module itself. That file
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is Documentation/i2c/pseudo-controller-interface in the upstream patch.
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When servod starts, if the i2c-pseudo module is loaded servod will automatically
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create an I2C pseudo adapter for the Servo I2C bus. That I2C adapter may then
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be used in userspace through i2c-dev (/dev/i2c-<N>). The i2c-tools package
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provides command line utilities for interfacing with i2c-dev devices, and some
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CrOS software can work directly with i2c-dev devices as well, such as iteflash
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which is used by flash_ec when reflashing an ITE EC through a Servo.
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Automated installation:
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$ ./install
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