From patchwork Wed May 12 15:21:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ChiYuan Huang X-Patchwork-Id: 12254207 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70261C43611 for ; Wed, 12 May 2021 16:09:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 54CB661D33 for ; Wed, 12 May 2021 16:09:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233926AbhELQJH (ORCPT ); Wed, 12 May 2021 12:09:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51404 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235116AbhELPte (ORCPT ); Wed, 12 May 2021 11:49:34 -0400 Received: from mail-pf1-x42f.google.com (mail-pf1-x42f.google.com [IPv6:2607:f8b0:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 713AAC061233; Wed, 12 May 2021 08:21:53 -0700 (PDT) Received: by mail-pf1-x42f.google.com with SMTP id h16so5994248pfk.0; Wed, 12 May 2021 08:21:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=c+foEbP8Ys0eNzGlzMVThZeYcnahn6T/Ka4KBWcvRdQ=; b=lsGoymjiuS8L1lqR1iF+HwlhNFwKfefBsVn5YYo4Ajpr5LNOpOQecnoI6X/UmpoSPN ryQ7BaDlF/YV7tR6x+8dddCNmG19qGAbm6fyFd1CVFAWNI5Otxkrl7X5bW3FfD9XWTu/ gppA3716+TvDZGW3TGbRl6FDsrzMZmwIFxFOwwZhB++mRR+K1pD0//bCdq7TkfiLCCVs D15i/yHywgOW3IKqTS0rh5AfMTZ/5bm8wDhLexxa0gtsh+XAxmKFucweRW5zg2oHBQQ9 EitiBMJEhcUG5hlwWYslgIeILK8EPO8KtN+XftNTAMwgp907Az18o2UloRCaLsQYgFx9 XNsg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=c+foEbP8Ys0eNzGlzMVThZeYcnahn6T/Ka4KBWcvRdQ=; b=gjKUsDjaJwMYDt1kZ6w9IeMCSzlwqE0XeKk8yaf6ABTmpk4Ki1WsLDTF1Q0RdfgJpy nArmn7L1Gi31V4F+J5BRKgIvXO6agNIMYhc7vHi240a3gvnugRosZ0xmaPcAS2YLG8Y5 Rsh6T9CRRL+Mzy1iggMuEAthuLPjJ6Z+jr5Pe6EjV4zI6WZrRtcC6zvYqSXlrxey2dCE xWQk1G7flAEte4AEU/MRGx1bBbmPXvVkV1I5c+plpAj6K9NFfF9VvW3kxnLUKUQzVRcJ IRBkdJ7UslaQ1RgWRelpdt+bxizhIbyJeCfSOzzfCwH7ut2mPuiDZ6zhjvlE/gB1iL/7 bK8A== X-Gm-Message-State: AOAM532kugw+XDeSfB7I2Gf+gAkS34tdvTxFZcBpk9nGWcD6mrzx9Obj ytYipd9XZDiA37+BtJu1wao= X-Google-Smtp-Source: ABdhPJwDM/0Ps4RrzDCgoAHI13EfSPQv6Gm/TNn1RsA5CmIs2+S9UMN/Dli8avYcOmXuHBEur9/K5Q== X-Received: by 2002:a62:4e96:0:b029:2c5:3067:90ab with SMTP id c144-20020a624e960000b02902c5306790abmr13036928pfb.38.1620832912885; Wed, 12 May 2021 08:21:52 -0700 (PDT) Received: from localhost.localdomain (1-171-3-209.dynamic-ip.hinet.net. [1.171.3.209]) by smtp.gmail.com with ESMTPSA id t133sm228633pgb.0.2021.05.12.08.21.49 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 12 May 2021 08:21:52 -0700 (PDT) From: cy_huang To: lee.jones@linaro.org, lgirdwood@gmail.com, broonie@kernel.org, daniel.thompson@linaro.org, jingoohan1@gmail.com, b.zolnierkie@samsung.com, pavel@ucw.cz, robh+dt@kernel.org Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, cy_huang@richtek.com Subject: [PATCH v7 2/4] backlight: rt4831: Adds DT binding document for Richtek RT4831 backlight Date: Wed, 12 May 2021 23:21:38 +0800 Message-Id: <1620832900-8347-2-git-send-email-u0084500@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1620832900-8347-1-git-send-email-u0084500@gmail.com> References: <1620832900-8347-1-git-send-email-u0084500@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org From: ChiYuan Huang Adds DT binding document for Richtek RT4831 backlight. Signed-off-by: ChiYuan Huang Reviewed-by: Daniel Thompson --- since v7 - Add allOf property refer to common.yaml. - Remove default-brightness/max-brightness description and refer string. --- .../leds/backlight/richtek,rt4831-backlight.yaml | 62 ++++++++++++++++++++++ include/dt-bindings/leds/rt4831-backlight.h | 23 ++++++++ 2 files changed, 85 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml create mode 100644 include/dt-bindings/leds/rt4831-backlight.h diff --git a/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml new file mode 100644 index 00000000..e0ac686 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml @@ -0,0 +1,62 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/backlight/richtek,rt4831-backlight.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Richtek RT4831 Backlight + +maintainers: + - ChiYuan Huang + +description: | + RT4831 is a mutifunctional device that can provide power to the LCD display + and LCD backlight. + + For the LCD backlight, it can provide four channel WLED driving capability. + Each channel driving current is up to 30mA + + Datasheet is available at + https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf + +allOf: + - $ref: common.yaml# + +properties: + compatible: + const: richtek,rt4831-backlight + + default-brightness: + minimum: 0 + maximum: 2048 + + max-brightness: + minimum: 0 + maximum: 2048 + + richtek,pwm-enable: + description: | + Specify the backlight dimming following by PWM duty or by SW control. + type: boolean + + richtek,bled-ovp-sel: + description: | + Backlight OVP level selection, currently support 17V/21V/25V/29V. + $ref: /schemas/types.yaml#/definitions/uint8 + default: 1 + minimum: 0 + maximum: 3 + + richtek,channel-use: + description: | + Backlight LED channel to be used. + BIT 0/1/2/3 is used to indicate led channel 1/2/3/4 enable or disable. + $ref: /schemas/types.yaml#/definitions/uint8 + minimum: 1 + maximum: 15 + +required: + - compatible + - richtek,channel-use + +additionalProperties: false diff --git a/include/dt-bindings/leds/rt4831-backlight.h b/include/dt-bindings/leds/rt4831-backlight.h new file mode 100644 index 00000000..125c635 --- /dev/null +++ b/include/dt-bindings/leds/rt4831-backlight.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ +/* + * This header provides constants for rt4831 backlight bindings. + * + * Copyright (C) 2020, Richtek Technology Corp. + * Author: ChiYuan Huang + */ + +#ifndef _DT_BINDINGS_RT4831_BACKLIGHT_H +#define _DT_BINDINGS_RT4831_BACKLIGHT_H + +#define RT4831_BLOVPLVL_17V 0 +#define RT4831_BLOVPLVL_21V 1 +#define RT4831_BLOVPLVL_25V 2 +#define RT4831_BLOVPLVL_29V 3 + +#define RT4831_BLED_CH1EN (1 << 0) +#define RT4831_BLED_CH2EN (1 << 1) +#define RT4831_BLED_CH3EN (1 << 2) +#define RT4831_BLED_CH4EN (1 << 3) +#define RT4831_BLED_ALLCHEN ((1 << 4) - 1) + +#endif /* _DT_BINDINGS_RT4831_BACKLIGHT_H */