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SubjectRe: [PATCH] i2c: enable async suspend/resume on i2c devices
<div dir="ltr"><br><br><div class="gmail_quote"><div dir="ltr">On Fri, Jul 27, 2018 at 5:07 AM Hans de Goede &lt;<a href="mailto:hdegoede@redhat.com">hdegoede@redhat.com</a>&gt; wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
On 07/27/2018 12:44 PM, Andy Shevchenko wrote:<br>
&gt; On Fri, Jul 27, 2018 at 1:55 AM, Derek Basehore &lt;<a href="mailto:dbasehore@chromium.org" target="_blank">dbasehore@chromium.org</a>&gt; wrote:<br>
&gt;&gt; This enables the async suspend property for i2c devices. This reduces<br>
&gt;&gt; the suspend/resume time considerably on platforms with multiple i2c<br>
&gt;&gt; devices (such as a trackpad or touchscreen).<br>
&gt; <br>
&gt; How did you test this?<br></blockquote><div><br></div><div>It was tested on Apollolake Chromebook devices.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
&gt; <br>
&gt; Especially on Chromebooks based on Intel Cherrytrail / Braswell<br>
&gt; platforms, they have a painful PMIC vs. OS design solution.<br>
&gt; <br>
&gt; +Cc: Hans, who did a lot in this area.<br>
<br>
We disable suspend of the i2c controller for the i2c-bus<br>
to which the PMIc is connected on these platforms, so I do not<br>
expect this to cause any new issues.<br>
<br>
But this is something to keep an eye on,<br>
<br>
Regards,<br>
<br>
Hans<br>
<br>
</blockquote></div></div>
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