From nobody Fri Dec 19 10:41:44 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 72ED51EA7D2; Thu, 9 Oct 2025 06:48:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759992508; cv=none; b=frtANBE2P7/mdcEPz2LJ6uuPsm0wU7BpBu6wGouJ+ywGgbUwBESTcUWJrwEZy09IsqFF7ZcYUrBjgELloG9YjD1nqXDmwmmwV0y05GVfY1TmBFY6bp8p11ISAb9xUTDIHT5C7m3Nz87K3gxiWhu0IoK0gM+TR87Xwwj749/SvtI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759992508; c=relaxed/simple; bh=DDjKpr6gtv7Sbw5NKGi8tB6eysY8h2EsJ4D5k4IEpiQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=gegED06JEKt+cyuJM5cC9Tqs2GmqM88d9xLAK/1rfw42y/NIsUdgiIsPVV+AMI2pSium3o1A6F/Yppg73OgQq8aIUpZJ76MjAdVR8obb4H3ThTFEEt6AQvf98V6qGwPlHYwbpUGxBnnrL9LE+urZAZEKJPnCQxX1yyHE+c7XlqI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=u8Ip4fj3; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="u8Ip4fj3" Received: by smtp.kernel.org (Postfix) with ESMTPS id EEE3AC4CEF9; Thu, 9 Oct 2025 06:48:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1759992508; bh=DDjKpr6gtv7Sbw5NKGi8tB6eysY8h2EsJ4D5k4IEpiQ=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=u8Ip4fj3WcI8ZBqrCkDuUs4NN+BSaXF21LK1pxB+JtyNMi3Ju2h/LhBe3r+sHygaq P+1+e/ZhR1yVQ1xLZeeOlmO5PJbZkCAUjJO5DmZJGJwTAhaToNrYElvOeFs3xsRVWN foQp2zAyYFj+YRcjjws/gOf30wEt1qkjUHgsplU5gcvRmG3VzHF9LCNXJWpT2FKtkO OifT7C4fQVNSiy/c4KRj7FcjvzR4XXK8aUFrYeWLPNUvDXEPGbEfayNdNUCwdUwkHd 40qPin308Se4CNTYnJbK1c3tkJu24o5SCgJsSQTt78igZ2QJdFPLMkG4w+uz/CmjUz b67No4lduQVtA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC1C3CCA470; Thu, 9 Oct 2025 06:48:27 +0000 (UTC) From: Maud Spierings via B4 Relay Date: Thu, 09 Oct 2025 08:48:25 +0200 Subject: [PATCH v4 1/4] dt-bindings: backlight: Add max25014 bindings Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251009-max25014-v4-1-6adb2a0aa35f@gocontroll.com> References: <20251009-max25014-v4-0-6adb2a0aa35f@gocontroll.com> In-Reply-To: <20251009-max25014-v4-0-6adb2a0aa35f@gocontroll.com> To: Lee Jones , Daniel Thompson , Jingoo Han , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Helge Deller , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Liam Girdwood , Mark Brown Cc: dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Maud Spierings X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1759992506; l=3924; i=maudspierings@gocontroll.com; s=20250214; h=from:subject:message-id; bh=9GoY1YFZup8pyevGMqP0p2CbHPXkb49eiT7Kk0Aql2c=; b=UTjxhRktWaJOCpVH6gPGCMfTW3yTl1VRmKMfw3ZqGDel/DpQX0w9z2TUyP2RDcHVhlFV1p58m 68O/GoD9kEgDWP6i3NF+m3joPvLgytuKbxJZjcaCTet5R9sS0BsNQtT X-Developer-Key: i=maudspierings@gocontroll.com; a=ed25519; pk=7chUb8XpaTQDvWhzTdHC0YPMkTDloELEC7q94tOUyPg= X-Endpoint-Received: by B4 Relay for maudspierings@gocontroll.com/20250214 with auth_id=341 X-Original-From: Maud Spierings Reply-To: maudspierings@gocontroll.com From: Maud Spierings The Maxim MAX25014 is a 4-channel automotive grade backlight driver IC with integrated boost controller. In the current implementation the control registers for channel 1, control all channels. So only one led subnode with led-sources is supported right now. If at some point the driver functionality is expanded the bindings can be easily extended with it. Signed-off-by: Maud Spierings --- .../bindings/leds/backlight/maxim,max25014.yaml | 109 +++++++++++++++++= ++++ MAINTAINERS | 5 + 2 files changed, 114 insertions(+) diff --git a/Documentation/devicetree/bindings/leds/backlight/maxim,max2501= 4.yaml b/Documentation/devicetree/bindings/leds/backlight/maxim,max25014.ya= ml new file mode 100644 index 0000000000000..496520e1374e5 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml @@ -0,0 +1,109 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/backlight/maxim,max25014.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Maxim max25014 backlight controller + +maintainers: + - Maud Spierings + +properties: + compatible: + enum: + - maxim,max25014 + + reg: + maxItems: 1 + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + enable-gpios: + maxItems: 1 + + interrupts: + maxItems: 1 + + power-supply: + description: Regulator which controls the boost converter input rail. + + pwms: + maxItems: 1 + + maxim,iset: + $ref: /schemas/types.yaml#/definitions/uint32 + maximum: 15 + default: 11 + description: + Value of the ISET register field. This controls the current scale of= the + outputs, a higher number means more current. + +patternProperties: + "^led@[01]$": + type: object + description: Properties for a string of connected LEDs. + $ref: common.yaml# + + properties: + reg: + const: 0 + + led-sources: + allOf: + - minItems: 1 + maxItems: 4 + items: + minimum: 0 + maximum: 3 + default: [0, 1, 2, 3] + + default-brightness: + minimum: 0 + maximum: 100 + default: 50 + + required: + - reg + + additionalProperties: false + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + #include + #include + + i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + + backlight@6f { + compatible =3D "maxim,max25014"; + reg =3D <0x6f>; + enable-gpios =3D <&gpio1 4 GPIO_ACTIVE_HIGH>; + interrupt-parent =3D <&gpio1>; + interrupts =3D <2 IRQ_TYPE_EDGE_FALLING>; + power-supply =3D <®_backlight>; + pwms =3D <&pwm1>; + maxim,iset =3D <7>; + + #address-cells =3D <1>; + #size-cells =3D <0>; + + led@0 { + reg =3D <0>; + led-sources =3D <0 1 2 3>; + default-brightness =3D <50>; + }; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 47fbc5e06808f..be5e2515900ce 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15171,6 +15171,11 @@ F: Documentation/userspace-api/media/drivers/max21= 75.rst F: drivers/media/i2c/max2175* F: include/uapi/linux/max2175.h =20 +MAX25014 BACKLIGHT DRIVER +M: Maud Spierings +S: Maintained +F: Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml + MAX31335 RTC DRIVER M: Antoniu Miclaus L: linux-rtc@vger.kernel.org --=20 2.51.0