From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pali =?utf-8?q?Roh=C3=A1r?= Subject: Re: [RFC] shutdown machine when li-ion battery goes below 3V Date: Mon, 24 Oct 2016 23:48:47 +0200 Message-ID: <201610242348.47484@pali> References: <20161024212250.GA31336@amd> <20161024212932.uhjz752z2cy5hohl@atomide.com> <20161024214152.GA32310@amd> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart16986840.ZGJVRzGtid"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20161024214152.GA32310@amd> Sender: linux-kernel-owner@vger.kernel.org To: Pavel Machek Cc: Tony Lindgren , sre@kernel.org, kernel list , linux-arm-kernel , linux-omap@vger.kernel.org, khilman@kernel.org, aaro.koskinen@iki.fi, ivo.g.dimitrov.75@gmail.com, patrikbachan@gmail.com, serge@hallyn.com, abcloriens@gmail.com List-Id: linux-omap@vger.kernel.org --nextPart16986840.ZGJVRzGtid Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable On Monday 24 October 2016 23:41:52 Pavel Machek wrote: > On Mon 2016-10-24 14:29:33, Tony Lindgren wrote: > > Also, the shutdown voltage can depend on external devices > > connected. It could be for example 3.3V depending on eMMC on some > > devices while devices with no eMMC could have it at 3.0V. >=20 > Actually, I'd like to shutdown at 3.3V or more (like 3.5V), because > going below that is pretty mean to the battery. But if I set > threshold too high, GSM activity will push it below that for a very > short while, and I'll shutdown too soon. >=20 > Ideas welcome... bq27x00 has EDVF flag which means that battery is empty. Maemo with=20 bq27x00 driver is configured to issue system shutdown when EDVF is set. Maybe kernel should issue emergency shutdown e.g. after minute or two=20 after EDVF flag is set? =2D-=20 Pali Roh=C3=A1r pali.rohar@gmail.com --nextPart16986840.ZGJVRzGtid Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iEYEABECAAYFAlgOgb8ACgkQi/DJPQPkQ1J42wCeIqBcayIJa0aGXDxrcqMJJNNQ 9n4AoKNV1+kkLJxtRwlzWztF77ROqJ8N =gZ2F -----END PGP SIGNATURE----- --nextPart16986840.ZGJVRzGtid--