usb: host: fotg2: add silicon clock handling

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When used in a system with software-controlled silicon clocks,
the FOTG210 needs to grab, prepare and enable the clock.

This is needed on for example the Cortina Gemini, where the
platform will by default gate off the clock unless the
peripheral (in this case the USB driver) grabs and enables
the clock.

If there is no clock available on the platform, we live
without it. Make sure to percolate probe deferrals.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Linus Walleij 2018-09-01 18:03:12 +02:00 • committed by Greg Kroah-Hartman

parent 697fa834c3

commit ffa8a31b5b

2 changed files with 32 additions and 4 deletions

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33

drivers/usb/host/fotg210-hcd.c

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3

drivers/usb/host/fotg210.h

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