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[90.63.244.31]) by smtp.googlemail.com with ESMTPSA id p13sm2315273wmi.0.2021.11.02.03.05.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Nov 2021 03:05:32 -0700 (PDT) From: Corentin LABBE To: lee.jones@linaro.org, daniel.thompson@linaro.org, jingoohan1@gmail.com Subject: [PATCH] backlight: led_bl: Add support for an "enable" GPIO Date: Tue, 2 Nov 2021 10:04:55 +0000 Message-Id: <20211102100455.2016610-1-clabbe@baylibre.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 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: , Cc: linux-fbdev@vger.kernel.org, khilman@baylibre.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Corentin LABBE , Jean-Jacques Hiblot Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Jean-Jacques Hiblot This patch adds support for an "enable GPIO". Signed-off-by: Jean-Jacques Hiblot Signed-off-by: Corentin LABBE --- drivers/video/backlight/led_bl.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/video/backlight/led_bl.c b/drivers/video/backlight/led_bl.c index f54d256e2d54..ebd7acc32980 100644 --- a/drivers/video/backlight/led_bl.c +++ b/drivers/video/backlight/led_bl.c @@ -8,6 +8,7 @@ #include #include +#include #include #include @@ -15,6 +16,7 @@ struct led_bl_data { struct device *dev; struct backlight_device *bl_dev; struct led_classdev **leds; + struct gpio_desc *enable_gpio; bool enabled; int nb_leds; unsigned int *levels; @@ -35,6 +37,9 @@ static void led_bl_set_brightness(struct led_bl_data *priv, int level) for (i = 0; i < priv->nb_leds; i++) led_set_brightness(priv->leds[i], bkl_brightness); + if (!priv->enabled) + gpiod_set_value_cansleep(priv->enable_gpio, 1); + priv->enabled = true; } @@ -48,6 +53,9 @@ static void led_bl_power_off(struct led_bl_data *priv) for (i = 0; i < priv->nb_leds; i++) led_set_brightness(priv->leds[i], LED_OFF); + if (priv->enabled) + gpiod_set_value_cansleep(priv->enable_gpio, 0); + priv->enabled = false; } @@ -209,6 +217,11 @@ static int led_bl_probe(struct platform_device *pdev) return PTR_ERR(priv->bl_dev); } + priv->enable_gpio = devm_gpiod_get_optional(&pdev->dev, "enable", + GPIOD_OUT_LOW); + if (IS_ERR(priv->enable_gpio)) + return PTR_ERR(priv->enable_gpio); + for (i = 0; i < priv->nb_leds; i++) led_sysfs_disable(priv->leds[i]);