<p><a class="user-mention" data-hovercard-type="user" data-hovercard-url="/hovercards?user_id=1301112" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/benpicco">@benpicco</a> I am using this actively today already. As listed above, I have a fully working branch for pm_layered in atmega1284p. PM for these device is quite hard. In general the developer should take care of this, by e.g. freeing i2c/spi/... which leads to <code>pm_unblock</code> for this periphs, and hopefully deeper sleep modes. However, this already did not work, due to RX of UART, which always kept blocking any sleep modes except idle. See <a class="issue-link js-issue-link" data-error-text="Failed to load issue title" data-id="272487121" data-permission-text="Issue title is private" data-url="https://github.com/RIOT-OS/RIOT/issues/7974" data-hovercard-type="pull_request" data-hovercard-url="/RIOT-OS/RIOT/pull/7974/hovercard" href="https://github.com/RIOT-OS/RIOT/pull/7974">#7974</a></p>

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