From patchwork Wed Mar 30 16:29:36 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 8700081 Return-Path: X-Original-To: patchwork-linux-fbdev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 6114F9F44D for ; Wed, 30 Mar 2016 16:29:54 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 70AC1200D4 for ; Wed, 30 Mar 2016 16:29:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DAC4C2038F for ; Wed, 30 Mar 2016 16:29:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932178AbcC3Q3s (ORCPT ); Wed, 30 Mar 2016 12:29:48 -0400 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:57066 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932110AbcC3Q3q (ORCPT ); Wed, 30 Mar 2016 12:29:46 -0400 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 1alIzz-0001BL-Au; Wed, 30 Mar 2016 16:29:39 +0000 Received: from broonie by finisterre with local (Exim 4.87) (envelope-from ) id 1alIzx-0007QT-D4; Wed, 30 Mar 2016 09:29:37 -0700 From: Mark Brown To: Tomi Valkeinen , Jean-Christophe Plagniol-Villard Cc: linux-omap@vger.kernel.org, linux-fbdev@vger.kernel.org, Mark Brown Date: Wed, 30 Mar 2016 09:29:36 -0700 Message-Id: <1459355376-28507-1-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=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Subject: [PATCH] omapfb: Fix regulator API abuse in dss.c and hdmi4.c 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-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org 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 can skip setting the voltage it should just never set the voltage. Signed-off-by: Mark Brown --- drivers/video/fbdev/omap2/omapfb/dss/dsi.c | 9 --------- drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c | 9 --------- 2 files changed, 18 deletions(-) diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dsi.c b/drivers/video/fbdev/omap2/omapfb/dss/dsi.c index 0eec073b3919..cfd0e3d5f36a 100644 --- a/drivers/video/fbdev/omap2/omapfb/dss/dsi.c +++ b/drivers/video/fbdev/omap2/omapfb/dss/dsi.c @@ -1180,15 +1180,6 @@ static int dsi_regulator_init(struct platform_device *dsidev) return PTR_ERR(vdds_dsi); } - if (regulator_can_change_voltage(vdds_dsi)) { - r = regulator_set_voltage(vdds_dsi, 1800000, 1800000); - if (r) { - devm_regulator_put(vdds_dsi); - DSSERR("can't set the DSI regulator voltage\n"); - return r; - } - } - dsi->vdds_dsi_reg = vdds_dsi; return 0; diff --git a/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c b/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c index 7103c659a534..68b5ce1610ea 100644 --- a/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c +++ b/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c @@ -114,15 +114,6 @@ static int hdmi_init_regulator(void) return PTR_ERR(reg); } - if (regulator_can_change_voltage(reg)) { - r = regulator_set_voltage(reg, 1800000, 1800000); - if (r) { - devm_regulator_put(reg); - DSSWARN("can't set the regulator voltage\n"); - return r; - } - } - hdmi.vdda_reg = reg; return 0;