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greybus: arche-platform: assert wake-detect to complete WAKE_OUT event

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After SVC generates WAKE_OUT (pulling wake-detect pin low) and APB is
brought out of reset, we need to assert wake-detect again to complete
SVC WAKE_OUT logic.

Testing Done:
- Used for DB3.5/EVT1.5 hardware during bringup
- Regression tested on DB3.1+ES2, DB3.1+ES3

Signed-off-by: Michael Scott <michael.scott@linaro.org>
Reviewed-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Tested-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Michael Scott 2016-01-27 16:41:00 -08:00 • committed by Greg Kroah-Hartman
commit 1e83ee3321
1 changed files with 4 additions and 2 deletions
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6
drivers/staging/greybus/arche-platform.c
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@ -79,9 +79,11 @@ static void svc_delayed_work(struct work_struct *work)
if (timeout >= 0) {
ret = of_platform_populate(np, NULL, NULL, dev);
if (!ret)
/* Should we set wake_detect gpio to output again? */
if (!ret) {
/* re-assert wake_detect to confirm SVC WAKE_OUT */
gpio_direction_output(arche_pdata->wake_detect_gpio, 1);
return;
}
}
/* FIXME: We may want to limit retries here */