From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5EB75D2ED0F for ; Tue, 20 Jan 2026 12:50:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C9E7F10E5DD; Tue, 20 Jan 2026 12:50:45 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="EmmdTeU0"; dkim-atps=neutral Received: from mail-pl1-f172.google.com (mail-pl1-f172.google.com [209.85.214.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id 317C010E5DD for ; Tue, 20 Jan 2026 12:50:44 +0000 (UTC) Received: by mail-pl1-f172.google.com with SMTP id d9443c01a7336-2a743050256so11022495ad.3 for ; Tue, 20 Jan 2026 04:50:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1768913444; x=1769518244; darn=lists.freedesktop.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=ZJYUWQwQhgkeAbC/dM1w7lsNUkVncAvp21VUFc05s9E=; b=EmmdTeU0IPnXpSVuFeYLipxCuHZNskK24IzF4Wb20jEExE+Cz07/Jj+hKPQXYkDdNX jTyGuDsXfoQ8Q2LdwJRluMAqEbuVYc8v+VgDbXopKDQNh0Yza7k0tZutdnTR4t3SGOBD 4C5ZHUikkhJbC2k3PPVvJ7pFPkKf0X57ATEHS46/Za+LUxZiSXD0I+lTZw57lemDzOoc Wf0BVr0NanoMajXnlNbBQY+Tdz0F4RElkqltNq2L9A8+7l5rNphm8DlQ/1GYZT96O0RM gd6hxEV2l6HqtcjLuANXGtWh+Bc0QkvkzJbPKmwPDdOP3UmsqNglth6gR7SORNJUpn1N 3iIw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768913444; x=1769518244; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=ZJYUWQwQhgkeAbC/dM1w7lsNUkVncAvp21VUFc05s9E=; b=xSJoa3dhd6u8es1KWYUS8zvQ5VeDoh7Ari/paESIZ4HdS8HJM5q8/G7QRQecRY3ecM qqXcnsorO2HsLhyFfk4IeDdb0Z7TzsuNNAsuNb579dijf/VNKW56TEx4+K1/SQzvPuWG XgH75aDoAs4dwt8pZr8WpXMoz4PlcCyNBiWlgUUD4jEOu5DU5Zhh41olBeO5hB0PEIXW S/DEZrBPaY56QWuWJ+qo11r0iXQqZ0AWQnnYrXtyt6InUJYi6VQuIM3V1lWNoyzn4v/F 3iNtlMpBP4xjYqeq8pbOHJS7nJemlBtMPvhw/2OqfInNe+vPki41X4sRNGLOWSaVBHcr wmEg== X-Forwarded-Encrypted: i=1; AJvYcCXxQYuBZomA438Sidzmsw6Gc8abAQbeAwesDhiwjCyZ751loTITV9arNOB6WX6JlPNUbMNOfxTTMtI=@lists.freedesktop.org X-Gm-Message-State: AOJu0YzQelrmwUY//78sD+Wjf7waWVGZEpCyaDkJ+JXm1ACqh82F0vP1 J4QGoka4x7TI2tTMeQMkr0bco6pXJmws5Q3hmSQ+C/gIltVQ8HXvmCa7 X-Gm-Gg: AZuq6aKv20MGT0U9uPKb4V1FstjwQiUd38wWVoA0LXbHEMeeL2vvqM5JqPY8Br3BgwD Fn9P+s9sqQstZDdqgnmp1nurJylL1/1HS32eBOHXDZqC6py1I7/riYsMz7zjOv3lbugqgVC6gtk uABqVcbkCCt7eAuQj5eYf+8TdCYQ4l2UJtcsjME7QcJLnr02/65lGWsJEyCHYAOc8qocDB0hjdO wmcgQj23vHJJHHvwBp43CAXixKNhCaXhbVYLUYR+7FHf6BZ0s+w+PmI5LVd6qvScDxd3RfZeRv9 RUIvjGTUijFwj3i9V09MavKotcpfN/AhiJIV6jhpVliIe+slEdnoDfaGy8zle/YC6XlhqSpPQA7 j4uDJMLA6ggS5IACD/xnsqtw00CTl/pCmqMiUIQnBHS0QwSS/4keyv337dAVO9qA9tJgiNBdN25 uVj5EZG/cMw6fh9PywuE0HyLwpmr6e96VuQ4WZ X-Received: by 2002:a17:903:1447:b0:298:2afa:796d with SMTP id d9443c01a7336-2a76b26ccd2mr17322155ad.61.1768913443613; Tue, 20 Jan 2026 04:50:43 -0800 (PST) Received: from test-HP-Desktop-Pro-G3.. ([103.218.174.23]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a7193dd582sm124973815ad.52.2026.01.20.04.50.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Jan 2026 04:50:43 -0800 (PST) From: Sudarshan Shetty To: lee@kernel.org, danielt@kernel.org, jingoohan1@gmail.com Cc: deller@gmx.de, pavel@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Sudarshan Shetty Subject: [PATCH v2 0/2] backlight: gpio: add support for multiple GPIOs for backlight control Date: Tue, 20 Jan 2026 18:20:34 +0530 Message-Id: <20260120125036.2203995-1-tessolveupstream@gmail.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi all, This patch extends the gpio-backlight driver and its Device Tree bindings to support multiple GPIOs for controlling a single backlight device. Some panels require more than one GPIO to enable or disable the backlight, and previously the driver only supported a single GPIO. With this change: - The driver now handles an array of GPIOs and updates all of them based on brightness state. - The Device Tree binding has been updated to allow specifying one or more GPIOs for a gpio-backlight node. This approach avoids describing multiple backlight devices in DT for a single panel. Changes in v2: - Used devm_gpiod_get_array() and struct gpio_descs - Replaced per-index GPIO handling with descriptor array access - Moved the bitmap allocation to probe using devm_kcalloc(). - Updated commit messages. Thanks, Anusha Sudarshan Shetty (2): dt-bindings: backlight: gpio-backlight: allow multiple GPIOs backlight: gpio: add support for multiple GPIOs for backlight control .../leds/backlight/gpio-backlight.yaml | 24 ++++++- drivers/video/backlight/gpio_backlight.c | 66 +++++++++++++------ 2 files changed, 67 insertions(+), 23 deletions(-) -- 2.34.1