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Merged
merged 2 commits into from
May 4, 2025
Merged

Split I2C tunneling out of ccgx module #112

merged 2 commits into from
May 4, 2025

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JohnAZoidberg
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@JohnAZoidberg JohnAZoidberg commented Apr 28, 2025 •
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Tested i2c_read:

Note that the port number does not seem to always match the right one.

# Framework 13 - Ryzen AI 300
# ALS Sensor - different every time if ambient light changes
# Should actually be port number 7, but it seems the zephyr DT mapping changes it to 5, probably because 5 and 6 are unused
i2c_read(0x05, 0x29, 0x04, 0x08)

# Framework 12
# BMA4XX
# ID, returns 0x18
i2c_read(ec, 0x07, 0x18, 0x00, 0x01)
# Time, every time different
i2c_read(ec, 0x07, 0x18, 0x18, 0x01)
# Temperature, usually same
i2c_read(ec, 0x07, 0x18, 0x22, 0x01)
# Temp
i2c_read(ec, 0x06, 0x4D, 0xFD, 0x01)

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On windows and Linux should use kernel driver by default and fallback to manual host commands if not available.

@JohnAZoidberg JohnAZoidberg changed the title I2c refactor Split I2C tunneling out of ccgx module Apr 29, 2025
@JohnAZoidberg
chromium_ec: Extract i2c_passthrough to separate module
8ad5c4f 
TODO: Split out port and address code also

Signed-off-by: Daniel Schaefer <dhs@frame.work>
@JohnAZoidberg
i2c_passthrough: Add i2c_write function
426090e 
Signed-off-by: Daniel Schaefer <dhs@frame.work>
@JohnAZoidberg JohnAZoidberg marked this pull request as ready for review April 30, 2025 08:50
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The current changes to not change any behavior, purely refactoring.

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Merging now to avoid accumulating merge conflicts.

@JohnAZoidberg JohnAZoidberg merged commit 3e819a2 into main May 4, 2025
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@JohnAZoidberg JohnAZoidberg deleted the i2c-refactor branch May 4, 2025 11:08
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