From patchwork Sun Apr 16 10:35:46 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Kocialkowski X-Patchwork-Id: 751129 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3w5Sj90cTXz9s2x for ; Sun, 16 Apr 2017 20:45:33 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755352AbdDPKpa (ORCPT ); Sun, 16 Apr 2017 06:45:30 -0400 Received: from gagarine.paulk.fr ([109.190.93.129]:57497 "EHLO gagarine.paulk.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754304AbdDPKp2 (ORCPT ); Sun, 16 Apr 2017 06:45:28 -0400 X-Greylist: delayed 550 seconds by postgrey-1.27 at vger.kernel.org; Sun, 16 Apr 2017 06:45:27 EDT Received: by gagarine.paulk.fr (Postfix, from userid 65534) id D7C8820FEF; Sun, 16 Apr 2017 12:36:15 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on gagarine.paulk.fr X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=none autolearn=unavailable autolearn_force=no version=3.4.0 Received: from localhost.localdomain (collins [192.168.1.129]) by gagarine.paulk.fr (Postfix) with ESMTP id D6623200D1; Sun, 16 Apr 2017 12:36:11 +0200 (CEST) From: Paul Kocialkowski To: linux-kernel@vger.kernel.org Cc: Thierry Reding , Lee Jones , Daniel Thompson , Jingoo Han , Bartlomiej Zolnierkiewicz , linux-pwm@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-tegra@vger.kernel.org, Paul Kocialkowski Subject: [PATCH] backlight: pwm_bl: Fix condition to set enable gpio as output Date: Sun, 16 Apr 2017 12:35:46 +0200 Message-Id: <20170416103546.3021-1-contact@paulk.fr> X-Mailer: git-send-email 2.12.2 Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org The move to a dedicated pwm_backlight_initial_power_state function in commit 7613c922315e308a6486d802abed2eb74443dffd modified the condition to set the enable gpio as output. This breaks specific use cases using that GPIO, such as tegra124-based nyan Chromebooks where backlight stopped working. This puts the condition back to the way it was before the move. Signed-off-by: Paul Kocialkowski --- drivers/video/backlight/pwm_bl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index d7efcb632f7d..e81b2b55be2b 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -304,7 +304,8 @@ static int pwm_backlight_probe(struct platform_device *pdev) * early. Leave the decision of the initial backlight state for later. */ if (pb->enable_gpio && - gpiod_get_direction(pb->enable_gpio) == GPIOF_DIR_IN) + (gpiod_get_direction(pb->enable_gpio) == GPIOF_DIR_IN || + gpiod_get_value(pb->enable_gpio) != 0)) gpiod_direction_output(pb->enable_gpio, 1); pb->power_supply = devm_regulator_get(&pdev->dev, "power");