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Driver-Model question

Hello.

I am writing a driver for a serial device.

I want it to be suspended before the serial driver,
and resumed after the serial driver.

Therefore, when I add it to the device hirarchy, I must
set the parent to point to the serial device.

the question is how can I find the device pointer of the
serial device ? i couldn't see any API for that...

(I am using platform API since 8250.c driver is using it as its bus)

Thank You
Naziir

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