From patchwork Mon Aug 15 09:01:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ChiaEn Wu X-Patchwork-Id: 597421 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B727BC282E7 for ; Mon, 15 Aug 2022 09:02:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241720AbiHOJCi (ORCPT ); Mon, 15 Aug 2022 05:02:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52900 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241666AbiHOJC3 (ORCPT ); Mon, 15 Aug 2022 05:02:29 -0400 Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E57F920F57; Mon, 15 Aug 2022 02:02:27 -0700 (PDT) Received: by mail-pj1-x1036.google.com with SMTP id pm17so6434939pjb.3; Mon, 15 Aug 2022 02:02:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=GRGvr3sID7jAVOYfYb4nMCNV/0WVh6yEnvH7X6kj6k4=; b=lTOZnjIn7uMQrL//vg+5luzcrgAQWppu42fNuZW8DjaRxKD7G4kNBAImq5NuI6nNnp rhIRmDkvAwMDL1Ysz/XUZvh1OWJ57UzBJb3hgJAZzidIoLZp2ar6XN5W9/CHufZDlNJb ljf8wIK1uiDUBqXp6RXkyuUYdJOL+giZBAqLvYXlDfkECBZOeDnkwQYZnm9MRgD1noDo P0ndnDwiRbmaabENRp3SPU40neHtVaPWY7FYSZU4cZ2C088uf6hyixX7j+PSqwMOzWGw 6XMtGzOwJ3bK4ZOYUF1+yvVnHg5rmfKSWY2P9zUT7SmTz6ACQtU/rGfdpDj0ugXzhatl Ggqw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc; bh=GRGvr3sID7jAVOYfYb4nMCNV/0WVh6yEnvH7X6kj6k4=; b=1GAuWRw80djw8AV49XVte3eVZX7eYk/cmh5mkQBseV/yjIA/0I5yE43am511a2aT4M 6VbUm2dSDYy18076M+mp+SZYeCpSfVTAOZo+8DcI/3g3iJrhPYwD2y2p0Ky+GoukVaUA A/srpmLgVTX/mwt16JLBpP5lrPuMv5RmHVTljq2tdkOVFJ4d9XR1A3YXhz8xnLbBhPQ8 rX7urZrevZnVO1XABD+n2phZik/k/uDF7uEtEV3OBkminG/AR103T8HbfFfzck6ZJSML HZPiNRvg9whPHCBlLnnKfxcOszZN/1OVPR3BXZi1ODXu4x74tozI2zfEvbMBCj0sZXMQ ZtkQ== X-Gm-Message-State: ACgBeo0yzlhIoe9EuyEjeDCjCvIuw0Y/Q75avNbhre5/+8vl8Ne3TTDD V1IsmcQJexZ5MOGrIxnAwpQ= X-Google-Smtp-Source: AA6agR6MPlDDHdSQAJFO8PlCGiKeWpjJjDSBHxplA64miH+YccEYhOHnwJND6n3qEIoU1woUtW8Mmw== X-Received: by 2002:a17:90b:4c8c:b0:1f4:f6e8:2de0 with SMTP id my12-20020a17090b4c8c00b001f4f6e82de0mr16839442pjb.36.1660554147373; Mon, 15 Aug 2022 02:02:27 -0700 (PDT) Received: from DESKTOP-IBN2BAQ.localdomain ([123.110.155.185]) by smtp.gmail.com with ESMTPSA id a17-20020a656411000000b00412a708f38asm5491612pgv.35.2022.08.15.02.02.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Aug 2022 02:02:27 -0700 (PDT) From: ChiaEn Wu To: lee@kernel.org, daniel.thompson@linaro.org, jingoohan1@gmail.com, pavel@ucw.cz, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, matthias.bgg@gmail.com, sre@kernel.org, chunfeng.yun@mediatek.com, gregkh@linuxfoundation.org, jic23@kernel.org, lars@metafoo.de, linux@roeck-us.net, heikki.krogerus@linux.intel.com, deller@gmx.de, broonie@kernel.org, mazziesaccount@gmail.com, lgirdwood@gmail.com, andriy.shevchenko@linux.intel.com Cc: chiaen_wu@richtek.com, alice_chen@richtek.com, cy_huang@richtek.com, dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, linux-iio@vger.kernel.org, linux-fbdev@vger.kernel.org, szunichen@gmail.com, Rob Herring Subject: [RESEND PATCH v8 05/12] dt-bindings: backlight: Add MediaTek MT6370 backlight Date: Mon, 15 Aug 2022 17:01:18 +0800 Message-Id: <20220815090125.27705-6-peterwu.pub@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220815090125.27705-1-peterwu.pub@gmail.com> References: <20220815090125.27705-1-peterwu.pub@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org From: ChiYuan Huang Add MT6370 backlight binding documentation. Reviewed-by: Rob Herring Signed-off-by: ChiYuan Huang Signed-off-by: ChiaEn Wu Reviewed-by: Daniel Thompson --- .../backlight/mediatek,mt6370-backlight.yaml | 121 ++++++++++++++++++ 1 file changed, 121 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml diff --git a/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml new file mode 100644 index 000000000000..5533b6562d92 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml @@ -0,0 +1,121 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/backlight/mediatek,mt6370-backlight.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MediaTek MT6370 Backlight + +maintainers: + - ChiaEn Wu + +description: | + This module is part of the MT6370 MFD device. + The MT6370 Backlight WLED driver supports up to a 29V output voltage for + 4 channels of 8 series WLEDs. Each channel supports up to 30mA of current + capability with 2048 current steps (11 bits, only for MT6370/MT6371) or + 16384 current steps (14 bits, only for MT6372) in exponential or linear + mapping curves. + +allOf: + - $ref: common.yaml# + +properties: + compatible: + enum: + - mediatek,mt6370-backlight + - mediatek,mt6372-backlight + + default-brightness: + minimum: 0 + + max-brightness: + minimum: 0 + + enable-gpios: + description: External backlight 'enable' pin + maxItems: 1 + + mediatek,bled-pwm-enable: + description: | + Enable external PWM input for backlight dimming + type: boolean + + mediatek,bled-pwm-hys-enable: + description: | + Enable the backlight input-hysteresis for PWM mode + type: boolean + + mediatek,bled-pwm-hys-input-th-steps: + $ref: /schemas/types.yaml#/definitions/uint8 + enum: [1, 4, 16, 64] + description: | + The selection of the upper and lower bounds threshold of backlight + PWM resolution. If we choose selection 64, the variation of PWM + resolution needs more than 64 steps. + + mediatek,bled-ovp-shutdown: + description: | + Enable the backlight shutdown when OVP level triggered + type: boolean + + mediatek,bled-ovp-microvolt: + enum: [17000000, 21000000, 25000000, 29000000] + description: | + Backlight OVP level selection. + + mediatek,bled-ocp-shutdown: + description: | + Enable the backlight shutdown when OCP level triggerred. + type: boolean + + mediatek,bled-ocp-microamp: + enum: [900000, 1200000, 1500000, 1800000] + description: | + Backlight OC level selection. + + mediatek,bled-exponential-mode-enable: + description: | + Enable the exponential mode of backlight brightness. If this property + is not enabled, the default is to use linear mode. + type: boolean + + mediatek,bled-channel-use: + $ref: /schemas/types.yaml#/definitions/uint8 + description: | + Backlight LED channel to be used. + Each bit mapping to: + - 0: CH4 + - 1: CH3 + - 2: CH2 + - 3: CH1 + minimum: 1 + maximum: 15 + +if: + properties: + compatible: + contains: + const: mediatek,mt6372-backlight + +then: + properties: + default-brightness: + maximum: 16384 + + max-brightness: + maximum: 16384 + +else: + properties: + default-brightness: + maximum: 2048 + + max-brightness: + maximum: 2048 + +required: + - compatible + - mediatek,bled-channel-use + +additionalProperties: false