From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965413AbbCPRMs (ORCPT ); Mon, 16 Mar 2015 13:12:48 -0400 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:47386 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933110AbbCPRMo (ORCPT ); Mon, 16 Mar 2015 13:12:44 -0400 Date: Mon, 16 Mar 2015 17:12:32 +0000 From: Mark Brown To: Charles Keepax Cc: lee.jones@linaro.org, sameo@linux.intel.com, lgirdwood@gmail.com, patches@opensource.wolfsonmicro.com, linux-kernel@vger.kernel.org Message-ID: <20150316171232.GU28806@sirena.org.uk> References: <1426525124-12317-1-git-send-email-ckeepax@opensource.wolfsonmicro.com> <1426525124-12317-3-git-send-email-ckeepax@opensource.wolfsonmicro.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="x8Ec79u/ZTqSPCUg" Content-Disposition: inline In-Reply-To: <1426525124-12317-3-git-send-email-ckeepax@opensource.wolfsonmicro.com> X-Cookie: Editing is a rewording activity. User-Agent: Mutt/1.5.23 (2014-03-12) X-SA-Exim-Connect-IP: 94.175.94.161 X-SA-Exim-Mail-From: broonie@sirena.org.uk Subject: Re: [PATCH 3/5] mfd: wm5110: Add delay before releasing reset line on cold boot X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on mezzanine.sirena.org.uk) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --x8Ec79u/ZTqSPCUg Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, Mar 16, 2015 at 04:58:42PM +0000, Charles Keepax wrote: > On the first boot of the wm5110 it is important the reset line is held > for slightly longer to ensure the device starts up well. This patch adds > a 5mS delay for this. How can we tell what first boot is - what happens if the device is fully powered off during system suspend for example? I'd expect to see this done for system resume as well if we don't know power was maintained (or whatever else the distinction is). --x8Ec79u/ZTqSPCUg Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBCAAGBQJVBw8AAAoJECTWi3JdVIfQJO8H/2zfRh4wnsTHiDU4ZihYgFnY zG/bePeROyJo7JkBnHUgxnCO8HQglGNQ2HwSFhvcTMq0U4gfo0Gjtgkp+jhslXZ0 syRuhprauz4UAnKpz83dKImWGA48u0HjazNdlguYWyi3hNmR+VExTo6nAt4CmHUZ r0zEFNHmDHY1h0hpRLDROQb4w5hiX51uXsDFtDLeeXXO1bjqEWr2M46ZclhQHPUu eWqAkYNMBaHtHQ3KVber6bwZfT5MA66gZsVcV3OR0erqYyh/6wnhAmUPN8v6rxMh f8GyaOWiizycLBJ1cMS11LTSOro8nlOtzNoFoe8acsXCKtEZJWS+MHytWO1HkUY= =ef+f -----END PGP SIGNATURE----- --x8Ec79u/ZTqSPCUg--