From patchwork Thu Dec 17 15:00:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ChiYuan Huang X-Patchwork-Id: 11979985 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,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 BAA99C2BBCA for ; Thu, 17 Dec 2020 15:02:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7D4D82396F for ; Thu, 17 Dec 2020 15:02:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728813AbgLQPBp (ORCPT ); Thu, 17 Dec 2020 10:01:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41272 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728086AbgLQPBn (ORCPT ); Thu, 17 Dec 2020 10:01:43 -0500 Received: from mail-pl1-x632.google.com (mail-pl1-x632.google.com [IPv6:2607:f8b0:4864:20::632]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 95DCDC061282; Thu, 17 Dec 2020 07:01:03 -0800 (PST) Received: by mail-pl1-x632.google.com with SMTP id j1so15290866pld.3; Thu, 17 Dec 2020 07:01:03 -0800 (PST) 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=uLokb1zRx1pVQtgPWP34wo6n/+dXy4QhhwmVGwjuvfc=; b=ub6jL/E+F3B6rndOOnb07mdMaDUhiJvCATbBW0ySIpaiDYgDNmn0vEZpCK59yNodtO M1abDcM0naQBhhNh7mp0FtTTDoc6oD2a7s3fzoyeOaqeogrTex91gRJ8Aa+zG9aJA0g6 mJEIB0RYNQPZMSAtOj9dh6E/SxFRBhpxVk23IqoS2k+MxIsew4o+SZqRdRTZnthI1XFF 12v7tpZYYxClhN6h4eaafwPoDQgoiEdtRSSVsjhbpVEsTg9tCSZ8moyD68rzelTc2dNP vLE2BKWzxwEThKyT3OsFf+PJPeGgP1FVKQHxHVsRebp1w2k8t7KCQkrSf3ytJ4gToJDX aCRw== 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=uLokb1zRx1pVQtgPWP34wo6n/+dXy4QhhwmVGwjuvfc=; b=Hw3IHVZilROWeL0Z+mTd4WDtsvWAuqz/l0tosD2w7STZB4uDsQ1bvRACaOAVlg42HZ +aB16uo13TafFrR5XX8KxtKOUPVhDyhfeZfE2k+7a0DAK9wyZEEnwj1ZS/RZmU4jaEHO npv0nYe5/RcOQFNNvt7LoF1YEWcIXrjNH25aIQddb356zgxG7gbV1flZ+p8WtvBJ7QsL szufG8Jl911Zf6AFDutboyu/zmCZ+sDTZwPwjraTx4/PXOeCksFPNgmHEla1H2097L9h zvGI8WkjT1fW8N/C1TioTEGafzmYjnFz2ka45C6Wt825BeZ1EI3Kafj5HtePmOqhrE/A aWHg== X-Gm-Message-State: AOAM532DjejIucce+JtAv8+K+UMcOrTxx/XsZlGBcYV48IBC/wjLsZ3R BcWH0fkzOH2fi/pZ2ocod3JpaUzPsACCHg== X-Google-Smtp-Source: ABdhPJwmZX7FmTkkEOY4Zsnrlt9rHB7T7g1cBvG+lCLqSPtLnUp2X8/P6HQuqalmt/fZ/tBY4ZBb2Q== X-Received: by 2002:a17:90a:2a42:: with SMTP id d2mr8261488pjg.42.1608217263011; Thu, 17 Dec 2020 07:01:03 -0800 (PST) Received: from localhost.localdomain (1-171-2-187.dynamic-ip.hinet.net. [1.171.2.187]) by smtp.gmail.com with ESMTPSA id o140sm6189074pfd.26.2020.12.17.07.01.00 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 17 Dec 2020 07:01:02 -0800 (PST) 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 Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, ChiYuan Huang Subject: [PATCH v5 2/6] backlight: rt4831: Adds DT binding document for Richtek RT4831 backlight Date: Thu, 17 Dec 2020 23:00:40 +0800 Message-Id: <1608217244-314-2-git-send-email-u0084500@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1608217244-314-1-git-send-email-u0084500@gmail.com> References: <1608217244-314-1-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 --- since v5 - Drop the example in dt-binding. Aready full example in mfd dt-binding. since v3 - Move inlcude/dt-bindings/leds/rt4831-backlight.h from patch 0004 to here. - Add dual license tag in header and backlight binding document. - Left backlight dt-binding example only. --- .../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 */