greybus: loopback: add poll support to the iteration_count sysfs file

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This adds the ability to poll on "iteration_count" in sysfs and be woken
up when it changes, saving some cycles constantly hammering on the file
waiting for it to change.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>

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Greg Kroah-Hartman 2015-07-22 11:09:23 -07:00

parent 701615f82f

commit c2939f41bc

1 changed files with 2 additions and 1 deletions

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drivers/staging/greybus/loopback.c

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