From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932955AbcGOMFt (ORCPT ); Fri, 15 Jul 2016 08:05:49 -0400 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:60535 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932763AbcGOMFp (ORCPT ); Fri, 15 Jul 2016 08:05:45 -0400 Date: Fri, 15 Jul 2016 20:01:13 +0800 From: Jisheng Zhang To: Mark Brown , Liam Girdwood , CC: Subject: "coupled" regulator support Message-ID: <20160715200113.0f3cd823@xhacker> X-Mailer: Claws Mail 3.13.2 (GTK+ 2.24.30; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-07-15_06:,, signatures=0 X-Proofpoint-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1604210000 definitions=main-1607150131 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I dunno how to name this kind of regulator, my situation is: multiple devices connects to one voltage regulator_dev, e.g devA and devB connects to regR, regR only support two voltage v1 and v2, let's say v1 < v2 regR can only be set to v1 if devA and devB all call for set voltage to v1 regR can set to v2 if devA or devB call for set voltage to v2 To support this situation, I'd like to add flag to regulator structure and patch regulator_check_consumers() to check whether we are safe to set the vol Is this patch acceptable or we already have elegant solution? Thanks in advance, Jisheng