From patchwork Fri Jun 30 11:21:06 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Enric Balletbo i Serra X-Patchwork-Id: 9819303 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9A1E76035F for ; Fri, 30 Jun 2017 11:23:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 89915285F1 for ; Fri, 30 Jun 2017 11:23:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7DC992861B; Fri, 30 Jun 2017 11:23:26 +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=-6.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY 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 2970728576 for ; Fri, 30 Jun 2017 11:23:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751584AbdF3LVv (ORCPT ); Fri, 30 Jun 2017 07:21:51 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:37404 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751560AbdF3LVV (ORCPT ); Fri, 30 Jun 2017 07:21:21 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: eballetbo) with ESMTPSA id 2A26026BF6B From: Enric Balletbo i Serra To: Thierry Reding , Lee Jones , Daniel Thompson , Jingoo Han , Bartlomiej Zolnierkiewicz , Rob Herring , Pavel Machek , Richard Purdie , Jacek Anaszewski , Heiko Stuebner Cc: linux-pwm@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, groeck@chromium.org, linux-rockchip@lists.infradead.org, huang lin Subject: [PATCH v2 1/4] dt-bindings: pwm-backlight: add pwm-delay-us property Date: Fri, 30 Jun 2017 13:21:06 +0200 Message-Id: <20170630112109.13785-1-enric.balletbo@collabora.com> X-Mailer: git-send-email 2.9.3 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: huang lin Add a pwm-delay-us property to specify the delay between setting an initial (non-zero) PWM value and enabling the backlight, and also the delay between disabling the backlight and setting PWM value to 0. Signed-off-by: huang lin Signed-off-by: Enric Balletbo i Serra --- Changes since v1: - As suggested by Daniel Thompson - Do not assume power-on delay and power-off delay will be the same v1: https://lkml.org/lkml/2017/6/28/219 Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt b/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt index 764db86..49b037e 100644 --- a/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt +++ b/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt @@ -17,6 +17,11 @@ Optional properties: "pwms" property (see PWM binding[0]) - enable-gpios: contains a single GPIO specifier for the GPIO which enables and disables the backlight (see GPIO binding[1]) + - pwm-delay-us: delay between setting an initial (non-zero) PWM value and + enabling the backlight, and also the delay between disabling + the backlight and setting PWM value to 0. + The 1st cell is the pre-delay in micro seconds. + The 2nd cell is the post-delay in micro seconds. [0]: Documentation/devicetree/bindings/pwm/pwm.txt [1]: Documentation/devicetree/bindings/gpio/gpio.txt @@ -32,4 +37,5 @@ Example: power-supply = <&vdd_bl_reg>; enable-gpios = <&gpio 58 0>; + pwm-delay-us = <10000 10000>; };