From nobody Thu Apr 9 12:08:21 2026 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 6F6D5258EF9; Tue, 7 Apr 2026 14:41:46 +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=1775572906; cv=none; b=sFwCKTeWprPldHDCQnCmy/q6PcgRXYS8tfJqfFMoHkxgD3Qi3oMfpIgE9qgbhNTpb1zkuauWRJVtSIIDbo72cvlXPAnA/8mNW+aWydzwDr8enguglRIQRCjqR4NaPcin7k1QAiI+p7D/tbH/JJI911HSJmyt+pQ4NToMbD8g/Ho= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775572906; c=relaxed/simple; bh=OCZBNxvoQHTLSNbncUAUntFZfUElInK//+0RKU0RpRI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=uMLFkREk+CoENq0hEIn+qb7tJOgMHdzHG23wR1TxjsbVF4ePgQEOxGKazAYG5uPimUsEjEQl2YPVLXC0fzzMhxA0A5MiE0bmWxwS/691Y7EHmwFEsbwo0r4FidlJ2Ll25C/DaNtq/xWVMWzEdgjpV9Cwxnt2XaftntqO6lFKxfc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gu9fJZwU; 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="gu9fJZwU" Received: by smtp.kernel.org (Postfix) with ESMTPS id 245B4C2BCAF; Tue, 7 Apr 2026 14:41:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775572906; bh=OCZBNxvoQHTLSNbncUAUntFZfUElInK//+0RKU0RpRI=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=gu9fJZwUQvX7+zI9g9d22OiZZOcHI6R93RiGO+uose113kUA2yJpn/3RvfIlEenfi JuleAMRoyJN8TzZ8cWinI604YHFX135U0GsYqokW1i1R8bwirzvIOZ6ajXSaQJIAne vx+32JyL5w5dbRjnvFHCQ9987b+rHPKATqHd4JeakEa5zlLKm+YcNsQfjDR2ReWRvE fHUUNQ7Asb0rjPJHcnp6VDqip9J2pC7DFNCd3/p0eOs5VFrF7xfhHKBvIpIlJCjOQh o1E6GyqvmEeBpqh7avZ3/0bjc084CX3RqulRanyK7J71JsH4kH3Ee/ub+mMqC39KLF ha3Tyh09jUZlA== 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 1C119FEEF52; Tue, 7 Apr 2026 14:41:46 +0000 (UTC) From: Maud Spierings via B4 Relay Date: Tue, 07 Apr 2026 16:41:42 +0200 Subject: [PATCH v8 1/4] dt-bindings: backlight: Add max25014 support 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: <20260407-max25014-v8-1-14eac7ed673a@gocontroll.com> References: <20260407-max25014-v8-0-14eac7ed673a@gocontroll.com> In-Reply-To: <20260407-max25014-v8-0-14eac7ed673a@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 , Frank Li 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 0.15.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1775572904; l=3542; i=maudspierings@gocontroll.com; s=20250214; h=from:subject:message-id; bh=wI7LikOzP1C7GvYpLTTVl+2QLbKSZ6aGcqr6KI8Kvzw=; b=2XxgIk5IgTyU/jzxJhrSo//Y3+lDQ0tuknOKKoIg2OfNxyNvbqZcBhhnJe2/f1W5guvqZM5Ti zO/vibJFzCnDdNItFZnNRDKX4pZxwnGPgB3yebhK2n2b8eQVvMhGmcn 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. Reviewed-by: Rob Herring (Arm) Signed-off-by: Maud Spierings --- 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. --- .../bindings/leds/backlight/maxim,max25014.yaml | 83 ++++++++++++++++++= ++++ MAINTAINERS | 5 ++ 2 files changed, 88 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..d00be2e081938 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml @@ -0,0 +1,83 @@ +# 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 + + default-brightness: + minimum: 0 + maximum: 100 + default: 50 + + 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 field in the ISET register. This controls the curr= ent + scale of the outputs, a higher number means more current. + + maxim,strings: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + A 4-bit bitfield that describes which led strings to turn on. + minItems: 4 + maxItems: 4 + items: + maximum: 1 + default: + [1 1 1 1] + +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>; + default-brightness =3D <50>; + 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>; + maxim,strings =3D <1 1 1 0>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 10d12b51b1f6f..7e3ad236537fe 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15688,6 +15688,11 @@ 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 2.53.0