From mboxrd@z Thu Jan 1 00:00:00 1970 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=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 EEA92C19437 for ; Tue, 8 Dec 2020 15:56:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C3F1B23AA9 for ; Tue, 8 Dec 2020 15:56:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730219AbgLHPzs (ORCPT ); Tue, 8 Dec 2020 10:55:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50880 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730208AbgLHPzr (ORCPT ); Tue, 8 Dec 2020 10:55:47 -0500 Received: from mail-pf1-x443.google.com (mail-pf1-x443.google.com [IPv6:2607:f8b0:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0B6D6C0613D6; Tue, 8 Dec 2020 07:55:01 -0800 (PST) Received: by mail-pf1-x443.google.com with SMTP id c12so7175866pfo.10; Tue, 08 Dec 2020 07:55:01 -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=SippBiPvnRnapzXhq7fOVJkKRsVVBzMZERi+BPHUIs4=; b=ch+eqqGXD00JXvr/ff7iqUJaF80VHgnLYOiJoJnCmwT/2wTaJnx8t/aBPfAIXbaTqy EYiTM/jBU3NomitdB7PoZIrn4FNJzxBRDPwUYcTrvWmqrHfc+sMGrU6POoqZ4f+ZNfmw WNFsw5vvW7BjjAXMzmHfJSHdYkU3NqJyUVC0gW/mLCo3WIEJcAf5vbHeVUoD0pCU5T+F hXbWs2MGef3i6z/74dRa3mmLA8myS3QF7AM8F/wEes/1bIPyBcYtXOybkZ57WHZOEGvx nGD1R1+r1L8TgN9YsFw5GKatJdmz13xDA/tO1N35QCiBsou+csEnZKCqPpBhraKzIA1m p/AQ== 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=SippBiPvnRnapzXhq7fOVJkKRsVVBzMZERi+BPHUIs4=; b=XpihKC2l2GkgPc4YlWmK28EafiD4RGkFxs9OdJQO/PiefEtrs56aU61Q/+wsp+XKlw ALMrdGCUZRfIoMuDmO0dANzidkNGGFR29VwCs23xo0VE9WVwfhhRRNGYqMbW8MQfpvtL x1bZnqowO942czZY50bCfFosm0iBEJWS3uohPvEME+vXgNF1v6wgbFji3kk/8LjDgyyk P78Aq7zZKRv2QjyNHOEDi70L+0r4it+MYXT3zisJILOq60YWwyQvSczUpLeVU5Bq641C JeiSck/5OdaSaiLL/H4ZOMjZR2LDwag8qOEvNMUokxlpzpRBzUD6R5YnP6nYbsJifwBk MiWA== X-Gm-Message-State: AOAM530hi5KmH5g2Zrdi+5bjE4By/dc3AX7xATrCkwBsstX+EAUMdd/h 0ORGRXYKlztXs8Qhx2mw+Y4= X-Google-Smtp-Source: ABdhPJz929CIOM6Ow03Xr+astPusY0L5CX7z4IgaGOOHbPXSzlHZ8Fr6WalYqAMyfpLlLMX/Zyqeow== X-Received: by 2002:aa7:8298:0:b029:19c:1564:7b0c with SMTP id s24-20020aa782980000b029019c15647b0cmr20643481pfm.6.1607442900401; Tue, 08 Dec 2020 07:55:00 -0800 (PST) Received: from localhost.localdomain (1-171-4-151.dynamic-ip.hinet.net. [1.171.4.151]) by smtp.gmail.com with ESMTPSA id a17sm6700725pgw.80.2020.12.08.07.54.58 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 08 Dec 2020 07:54:59 -0800 (PST) From: cy_huang To: lee.jones@linaro.org, robh+dt@kernel.org Cc: cy_huang@richtek.com, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v3 2/4] backlight: rt4831: Adds DT binding document for Richtek RT4831 backlight Date: Tue, 8 Dec 2020 23:54:44 +0800 Message-Id: <1607442886-13046-2-git-send-email-u0084500@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1607442886-13046-1-git-send-email-u0084500@gmail.com> References: <1607442886-13046-1-git-send-email-u0084500@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: ChiYuan Huang Adds DT binding document for Richtek RT4831 backlight. Signed-off-by: ChiYuan Huang --- 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 | 76 ++++++++++++++++++++++ include/dt-bindings/leds/rt4831-backlight.h | 23 +++++++ 2 files changed, 99 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..f24c8d1 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml @@ -0,0 +1,76 @@ +# 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 + +examples: + - | + #include + backlight { + compatible = "richtek,rt4831-backlight"; + default-brightness = <1024>; + max-brightness = <2048>; + richtek,bled-ovp-sel = /bits/ 8 ; + richtek,channel-use = /bits/ 8 ; + }; 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 */ -- 2.7.4