From patchwork Mon Apr 26 07:18:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ChiYuan Huang X-Patchwork-Id: 12223961 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=-15.8 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 6DCCBC433B4 for ; Mon, 26 Apr 2021 07:18:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3E9ED60233 for ; Mon, 26 Apr 2021 07:18:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232173AbhDZHTM (ORCPT ); Mon, 26 Apr 2021 03:19:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35122 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232160AbhDZHTG (ORCPT ); Mon, 26 Apr 2021 03:19:06 -0400 Received: from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com [IPv6:2607:f8b0:4864:20::1032]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A1B0CC061756; Mon, 26 Apr 2021 00:18:25 -0700 (PDT) Received: by mail-pj1-x1032.google.com with SMTP id h14-20020a17090aea8eb02901553e1cc649so2520215pjz.0; Mon, 26 Apr 2021 00:18:25 -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=+7gX6Zo6CBqGA3jozLvkUWHON6EnpU+jY3DCJ9/ueBY=; b=GX07qPzciPb7vXofwYjGZK01RaT/UwGdT7AcXl462FMjK1C2RC1sMnFU1S3ex/h+2K CLzBnUzJltTnebMcDJJNgA32CMk4xvYMmdy9wd8PWfYRKJA1+hOKK/6JjTosBNyVuib3 RGAfdwv5E9rIZe65WVbXspUZ42nT93JW/KT08IImF127YQq4WVPd1hcYdT7kI2gh4mPB KwrP8OGyRXPZ5GdVGMxii+9DJrnTWXJtjNNxS20i/nkCuNlE8BbydZMxfbvMgLeqzKaC K/pzlRcSpvIC/jHB15N46ma8+W8AfTghlLv3b4a4M6rXvrPxyCGvrffPI22VrQipcVuW QBYQ== 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=+7gX6Zo6CBqGA3jozLvkUWHON6EnpU+jY3DCJ9/ueBY=; b=oeVyXZwPOq1LLtmw55nOY1OA/leGAj8Ad0Zitf9eMQYhQSTAX8fhhXFDnmeII1JPop N67XFezq5rQ4W7Cne3kK0qrJ/IbnSB2Iw8ivhlQMrmy8urYJ3ExWamAqren4tMYykrVQ DAj77cl/z9SEGhMxsHVf9M5nmO9CGiY0VXEJ4hyt3UKI+C7s8f7t2zK4Y57haDLuDQYv huJvUblj1sjv0kGCJRX0pMibBZdtirbuKRTbVgBYCisiwobnpWYSjS//kuVNmZr54SL4 XsFBW6xpfSDdy66jJjOvqWb3BVPvL/22bEHGrid/By7AATN72dbZfqXQQkBfkGfVIds9 eVLw== X-Gm-Message-State: AOAM531Fv2ErIyq0JL+cTAJZDOvkW3icL1ekzkiL6cTQFBvFFyYJZTR2 uuvxS86bxt8ZFv2/uXcdUi0= X-Google-Smtp-Source: ABdhPJxHSnYgBQoARJPPM33fNtoFpUaVdYrHAuseZ1I9F1FgfXF6difqvp4DJA9oBq3ofQHMf3ajVQ== X-Received: by 2002:a17:90a:1b0b:: with SMTP id q11mr13000949pjq.181.1619421505150; Mon, 26 Apr 2021 00:18:25 -0700 (PDT) Received: from localhost.localdomain ([2402:7500:492:3af5:75cd:677a:81f7:a9fe]) by smtp.gmail.com with ESMTPSA id u21sm9848952pfm.89.2021.04.26.00.18.21 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 26 Apr 2021 00:18:24 -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: [RESEND PATCH v6 2/4] backlight: rt4831: Adds DT binding document for Richtek RT4831 backlight Date: Mon, 26 Apr 2021 15:18:09 +0800 Message-Id: <1619421491-31494-2-git-send-email-u0084500@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1619421491-31494-1-git-send-email-u0084500@gmail.com> References: <1619421491-31494-1-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 --- Resend this v6 patch series to loop devicetree reviewers. For next, need to add the below line Reviewed-by: Daniel Thompson --- .../leds/backlight/richtek,rt4831-backlight.yaml | 65 ++++++++++++++++++++++ include/dt-bindings/leds/rt4831-backlight.h | 23 ++++++++ 2 files changed, 88 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..4da6a66 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml @@ -0,0 +1,65 @@ +# 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 + +properties: + compatible: + const: richtek,rt4831-backlight + + default-brightness: + description: | + The default brightness that applied to the system on start-up. + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 0 + maximum: 2048 + + max-brightness: + description: | + The max brightness for the H/W limit + $ref: /schemas/types.yaml#/definitions/uint32 + 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 */