From: Scott Main <smain@google.com>
Date: Fri, 4 Dec 2020 20:09:22 +0000 (-0800)
Subject: Add timout loop after exporting the PWM pin.
X-Git-Tag: 5.8.1^2~4
X-Git-Url: https://git.ayoreis.com/Adafruit_Blinka-hackapet.git/commitdiff_plain/48a8b0cfe0b7d5b75ffcb357a1125ca25d972045?ds=inline;hp=48a8b0cfe0b7d5b75ffcb357a1125ca25d972045

Add timout loop after exporting the PWM pin.

This gives udev time to respond to the device event. Without this,
the subsequent attempts to modify pin properties will fail when
depending on udev rules to apply new user permissions.

This code is essentially copied from python-periphery, as was most
of this file (both MIT licenced). Although it appears sergeev added
this loop recently, compared to when this code was originally cloned.
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