From patchwork Mon Nov 12 09:02:57 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Heiko_St=C3=BCbner?= X-Patchwork-Id: 10678349 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CD13514BA for ; Mon, 12 Nov 2018 09:03:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AAF5529FAF for ; Mon, 12 Nov 2018 09:03:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9C2BD29FB1; Mon, 12 Nov 2018 09:03:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E9E3E29FAF for ; Mon, 12 Nov 2018 09:03:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728436AbeKLSzW (ORCPT ); Mon, 12 Nov 2018 13:55:22 -0500 Received: from gloria.sntech.de ([185.11.138.130]:47108 "EHLO gloria.sntech.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727208AbeKLSzW (ORCPT ); Mon, 12 Nov 2018 13:55:22 -0500 Received: from wd0239.dip.tu-dresden.de ([141.76.108.239] helo=phil.dip.tu-dresden.de) by gloria.sntech.de with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.89) (envelope-from ) id 1gM87d-0003ps-4p; Mon, 12 Nov 2018 10:03:05 +0100 From: Heiko Stuebner To: lee.jones@linaro.org, daniel.thompson@linaro.org, jingoohan1@gmail.com Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, enric.balletbo@collabora.com, heiko@sntech.de, Heiko Stuebner Subject: [PATCH] backlight: pwm_bl: fix devicetree parsing with auto-generated brightness tables Date: Mon, 12 Nov 2018 10:02:57 +0100 Message-Id: <20181112090257.7084-1-heiko@sntech.de> X-Mailer: git-send-email 2.18.0 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 From: Heiko Stuebner Commit 88ba95bedb79 ("backlight: pwm_bl: Compute brightness of LED linearly to human eye") made the parse-dt function return early when using an auto- generated brightness-table, but didn't take into account that some more settings were handled below the brightness handling, like power-on-delays and also setting the pdata enable-gpio to -EINVAL. This surfaces for example in the case of a backlight without any enable-gpio which then tries to use gpio-0 in error. Fix this by simply moving the trailing settings above the brightness handling. Fixes: 88ba95bedb79 ("backlight: pwm_bl: Compute brightness of LED linearly to human eye") Signed-off-by: Heiko Stuebner Acked-by: Daniel Thompson --- drivers/video/backlight/pwm_bl.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index bcd08b41765d..b7b5b31f3824 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -272,6 +272,16 @@ static int pwm_backlight_parse_dt(struct device *dev, memset(data, 0, sizeof(*data)); + /* + * These values are optional and set as 0 by default, the out values + * are modified only if a valid u32 value can be decoded. + */ + of_property_read_u32(node, "post-pwm-on-delay-ms", + &data->post_pwm_on_delay); + of_property_read_u32(node, "pwm-off-delay-ms", &data->pwm_off_delay); + + data->enable_gpio = -EINVAL; + /* * Determine the number of brightness levels, if this property is not * set a default table of brightness levels will be used. @@ -384,15 +394,6 @@ static int pwm_backlight_parse_dt(struct device *dev, data->max_brightness--; } - /* - * These values are optional and set as 0 by default, the out values - * are modified only if a valid u32 value can be decoded. - */ - of_property_read_u32(node, "post-pwm-on-delay-ms", - &data->post_pwm_on_delay); - of_property_read_u32(node, "pwm-off-delay-ms", &data->pwm_off_delay); - - data->enable_gpio = -EINVAL; return 0; }