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([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 Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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