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Reviewed-by: Philippe CORNU Signed-off-by: Yannick Fertre Signed-off-by: Alexandru Ardelean Reviewed-by: Daniel Thompson --- Link to original patch: https://github.com/STMicroelectronics/linux/commit/c4067d7bd883c6fa14ffd49892c4ce663cdafe98 drivers/video/backlight/gpio_backlight.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/video/backlight/gpio_backlight.c b/drivers/video/backlight/gpio_backlight.c index 6f78d928f054..d3fa3a8bef4d 100644 --- a/drivers/video/backlight/gpio_backlight.c +++ b/drivers/video/backlight/gpio_backlight.c @@ -53,6 +53,7 @@ static int gpio_backlight_probe(struct platform_device *pdev) struct backlight_device *bl; struct gpio_backlight *gbl; int ret, init_brightness, def_value; + u32 value; gbl = devm_kzalloc(dev, sizeof(*gbl), GFP_KERNEL); if (gbl == NULL) @@ -93,7 +94,11 @@ static int gpio_backlight_probe(struct platform_device *pdev) else bl->props.power = FB_BLANK_UNBLANK; - bl->props.brightness = 1; + ret = device_property_read_u32(dev, "default-brightness-level", &value); + if (!ret && value <= props.max_brightness) + bl->props.brightness = value; + else + bl->props.brightness = 1; init_brightness = backlight_get_brightness(bl); ret = gpiod_direction_output(gbl->gpiod, init_brightness); From patchwork Fri May 19 20:05:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Ardelean X-Patchwork-Id: 684203 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 862FAC7EE2D for ; Fri, 19 May 2023 20:05:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229862AbjESUFj (ORCPT ); Fri, 19 May 2023 16:05:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48044 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229719AbjESUFi (ORCPT ); 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Fri, 19 May 2023 13:05:34 -0700 (PDT) From: Alexandru Ardelean To: dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org Cc: lee@kernel.org, daniel.thompson@linaro.org, jingoohan1@gmail.com, pavel@ucw.cz, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, deller@gmx.de, Yannick Fertre , Philippe CORNU , Alexandru Ardelean Subject: [PATCH 2/2] dt-bindings: backlight: document new property default-brightness-level Date: Fri, 19 May 2023 23:05:20 +0300 Message-Id: <20230519200520.10657-2-alex@shruggie.ro> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230519200520.10657-1-alex@shruggie.ro> References: <20230519200520.10657-1-alex@shruggie.ro> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org From: Yannick Fertre Add documentation for new default-brightness-level property. Reviewed-by: Philippe CORNU Signed-off-by: Yannick Fertre Signed-off-by: Alexandru Ardelean --- Link to original patch: https://github.com/STMicroelectronics/linux/commit/c4067d7bd883c6fa14ffd49892c4ce663cdafe98 .../bindings/leds/backlight/gpio-backlight.yaml | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/devicetree/bindings/leds/backlight/gpio-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/gpio-backlight.yaml index 584030b6b0b9..b96c08cff0f0 100644 --- a/Documentation/devicetree/bindings/leds/backlight/gpio-backlight.yaml +++ b/Documentation/devicetree/bindings/leds/backlight/gpio-backlight.yaml @@ -23,6 +23,15 @@ properties: description: enable the backlight at boot. type: boolean + default-brightness-level: + description: + The default brightness level (index into the array defined by the + "brightness-levels" property). + $ref: /schemas/types.yaml#/definitions/uint32 + +dependencies: + default-brightness-level: [ "brightness-levels" ] + required: - compatible - gpios