From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753694Ab2FQX4f (ORCPT ); Sun, 17 Jun 2012 19:56:35 -0400 Received: from mailout1.samsung.com ([203.254.224.24]:14252 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753385Ab2FQX4d (ORCPT ); Sun, 17 Jun 2012 19:56:33 -0400 X-AuditID: cbfee61b-b7fcc6d000003a7a-8e-4fde6ead917c From: Sangbeom Kim To: "'Mark Brown'" Cc: "'Liam Girdwood'" , linux-kernel@vger.kernel.org, sameo@linux.intel.com, sbkim01@gmail.com References: <042301cd493e$8d95d7e0$a8c187a0$@com> <20120613174620.GD7804@opensource.wolfsonmicro.com> <04ad01cd49c0$df565d20$9e031760$@com> <20120617185305.GD4267@opensource.wolfsonmicro.com> In-reply-to: <20120617185305.GD4267@opensource.wolfsonmicro.com> Subject: RE: [PATCH 5/5] regulator: Support AP watchdog reset operation for s5m8767a Date: Mon, 18 Jun 2012 08:56:29 +0900 Message-id: <065501cd4ce4$d07c8b90$7175a2b0$@com> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit X-Mailer: Microsoft Office Outlook 12.0 Thread-index: Ac1MunEsYdsK5E+KRh+gAY66ymu0TwAKEr9A Content-language: ko X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrLLMWRmVeSWpSXmKPExsVy+t9jAd21eff8DX7etba4vGsOmwOjx+dN cgGMUVw2Kak5mWWpRfp2CVwZbU0zWAp6OCq+z7vH0sC4iK2LkZNDQsBE4uG+hVC2mMSFe+uB bC4OIYFFjBKH9/5ihXDmMknsfHCdCaSKTUBDYuXut0BVHBwiAmYSPw/ygISZBbIknk4/DlV/ lFFi29wVYPWcAg4Sk77tArOFBcIkft3+zAhiswioSjxacJAZxOYVMJTYdf0OK4QtKPFj8j0W iKFaEut3HmeCsOUlNq95ywyyV0JAXeLRX12QsIiAkcSr72vZIEpEJPa9eMc4gVFoFpJJs5BM moVk0iwkLQsYWVYxiqYWJBcUJ6XnGukVJ+YWl+al6yXn525iBAfyM+kdjKsaLA4xCnAwKvHw nki+5y/EmlhWXJl7iFGCg1lJhPd6OFCINyWxsiq1KD++qDQntfgQozQHi5I4b5P1BX8hgfTE ktTs1NSC1CKYLBMHp1QDY/09gUuvH719zbN5Y8VS4QfSTtXpM5U3zb+9842AgSr73pP3Ge99 WL3FX3OtSNzKD1a2Dc0ekoeZmX+d/L11k06un+/6D7JLnhse2eFvlvbv7tJCJq7sqY8m3z7J vk6+6M3eqlcFOR63jySHfz/16/DFba8OdCkldrZGZSwJ7+prddigd8Ur+bgSS3FGoqEWc1Fx IgCwe15eYAIAAA== X-TM-AS-MML: No Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 18, 2012 at 3:53 AM, Mark Brown wrote: > > Solution > > - Basic concept: After ap watchdog reset, GPIO configuration is > > changed by default value > > - S5M8767A has function of voltage control with gpio (8 levels with 3 > > gpios) > > - Set bootable voltage on level 0 -> can work with default gpio > > configuration > > - In the probing, Change voltage control level from level 0 to level 1 > > - Execute normal dvfs operation on level 1 > > - After watchdog reset, ap gpio is set by default value > > - PMIC operation mode is changed by ap reset (level1 -> level0) > > - AP can execute normal boot > > OK, so basically what you're doing is fixing one of the GPIO selected voltage levels so that when > the AP comes out of reset it'll drive the PMIC into a suitable level for it to boot? That makes > sense That's right. The voltage of S5M8767A can be controlled by GPIO. So, I try to check the status of gpio. I will resend above patch with adding detail commit message. Thanks, Sangbeom.