From patchwork Wed Mar 30 18:53:42 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 8702081 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 0A51FC0553 for ; Wed, 30 Mar 2016 18:54:30 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3CF8C2038A for ; Wed, 30 Mar 2016 18:54:29 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 54CA520386 for ; Wed, 30 Mar 2016 18:54:28 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9F6656E89A; Wed, 30 Mar 2016 18:54:25 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mezzanine.sirena.org.uk (mezzanine.sirena.org.uk [IPv6:2400:8900::f03c:91ff:fedb:4f4]) by gabe.freedesktop.org (Postfix) with ESMTPS id D6A646E89A for ; Wed, 30 Mar 2016 18:53:53 +0000 (UTC) Received: from [64.55.107.4] (helo=finisterre) by mezzanine.sirena.org.uk with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1alLFS-0001uM-23; Wed, 30 Mar 2016 18:53:46 +0000 Received: from broonie by finisterre with local (Exim 4.87) (envelope-from ) id 1alLFP-0007Q6-HF; Wed, 30 Mar 2016 11:53:43 -0700 From: Mark Brown To: David Airlie , Rob Clark Date: Wed, 30 Mar 2016 11:53:42 -0700 Message-Id: <1459364022-28484-1-git-send-email-broonie@kernel.org> X-Mailer: git-send-email 2.8.0.rc3 X-SA-Exim-Connect-IP: 64.55.107.4 X-SA-Exim-Mail-From: broonie@sirena.org.uk X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Subject: [PATCH] drm/msm/dsi: Fix regulator API abuse 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) Cc: Mark Brown , dri-devel@lists.freedesktop.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP The voltage changing code in this driver is broken and should be removed. The driver sets a single, exact voltage on probe. Unless there is a very good reason for this (which should be documented in comments) constraints like this need to be set via the machine constraints, voltage setting in a driver is expected to be used in cases where the voltage varies at runtime. In addition client drivers should almost never be calling regulator_can_set_voltage(), if the device needs to set a voltage it needs to set the voltage and the regulator core will handle the case where the regulator is fixed voltage. If the driver simply skips setting the voltage if it doesn't have permission then it shouild just not bother in the first place. Signed-off-by: Mark Brown --- drivers/gpu/drm/msm/dsi/dsi_host.c | 12 ------------ 1 file changed, 12 deletions(-) diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index 4282ec6bbaaf..a3e47ad83eb3 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -325,18 +325,6 @@ static int dsi_regulator_init(struct msm_dsi_host *msm_host) return ret; } - for (i = 0; i < num; i++) { - if (regulator_can_change_voltage(s[i].consumer)) { - ret = regulator_set_voltage(s[i].consumer, - regs[i].min_voltage, regs[i].max_voltage); - if (ret < 0) { - pr_err("regulator %d set voltage failed, %d\n", - i, ret); - return ret; - } - } - } - return 0; }