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  • Eric Millbrandt's avatar
    9179dd3b
    Reset i2c slave devices during init on mpc5xxx cpus · 9179dd3b
    Eric Millbrandt authored 
    
Reset any i2c devices that may have been interrupted during a system reset.
Normally this would be accomplished by clocking the line until SCL and SDA
are released and then sending a start condtiion (From an Atmel datasheet).
There is no direct access to the i2c pins so instead create start commands
through the i2c interface.  Send a start command then delay for the SDA Hold
time, repeat this by disabling/enabling the bus a total of 9 times.

Signed-off-by: default avatarEric Millbrandt <emillbrandt@dekaresearch.com>
    9179dd3b
    History
    Reset i2c slave devices during init on mpc5xxx cpus
    Eric Millbrandt authored 
    
Reset any i2c devices that may have been interrupted during a system reset.
Normally this would be accomplished by clocking the line until SCL and SDA
are released and then sending a start condtiion (From an Atmel datasheet).
There is no direct access to the i2c pins so instead create start commands
through the i2c interface.  Send a start command then delay for the SDA Hold
time, repeat this by disabling/enabling the bus a total of 9 times.

Signed-off-by: default avatarEric Millbrandt <emillbrandt@dekaresearch.com>