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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B0A1BC00140 for ; Fri, 5 Aug 2022 07:07:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240253AbiHEHHq (ORCPT ); Fri, 5 Aug 2022 03:07:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42224 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240326AbiHEHHX (ORCPT ); Fri, 5 Aug 2022 03:07:23 -0400 Received: from mail-pg1-x530.google.com (mail-pg1-x530.google.com [IPv6:2607:f8b0:4864:20::530]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C4AE674E0E; Fri, 5 Aug 2022 00:07:03 -0700 (PDT) Received: by mail-pg1-x530.google.com with SMTP id bf13so1929568pgb.11; Fri, 05 Aug 2022 00:07:03 -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=qeopJMMMGQSOM0makhnpPexR2tcMVpSaueKhDF363vc=; b=InwB0H0z7UJWx1xHOJC64Z4Kq8Ocdh/v3W/VRRB/TbDkixafeNdBDdpKacr0pCIRU8 j4R8m7lRV3mPaxFZvRp4z6mHXosKZIId+CyYyovhhD8wru0+AHnjANRuCx0X+96EBaaA sC/5pYw/OXnSDy7QuT3LC9G8ssdB8FbOwyMfllMcrovy7a09nEMEsZ4GtEUVxxift4uV xy3vxpy0nENJ4hSrGJ9LjvNM3tzwFrs9Wx3e1a1/YAVkjW76LpBluDW2IENsUjsvznfG n6y9msCnKBmAEYOlHbHJ6UGeQ1wlHztbnb5Res5lVaqFovHmmStPtcqurTo04HNSsSU/ nuAw== 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=qeopJMMMGQSOM0makhnpPexR2tcMVpSaueKhDF363vc=; b=QsB86xj5I2XXIgYy6pWV5Xh5ektXhwrcKcSEckIOsIEMkmJTARgKCYIt0CYBNZ1a3o M1UfruRuqm9qkzyptkNlVWM4g8ziYkqrH3YeC9uPtVPLL+lAeMitI8mZ9QuPgzin+GbL MbUDbYk05aRdCkhlpGjqIcaebWPgMwwhI8GDD5L1JFqdzGz9pPjcMwn2PTKUukmRmuO3 pnP/di1/EQ4yuE+L4e+S8qtm22qQPiVRWjpCKIzbUXzB72CMP8TIZ/cHDyzTb9OsI9Uv ARyGEJi13KVTnGNBibWPMzswsESGpq2G2fhxcBuCOGlrHsRLP0RON2gpFn3TjPNY2hJf DNqQ== X-Gm-Message-State: ACgBeo2i00OG6kM5MvT7HLdGeMYBefWmGWZo6651iEeFlBckTcxCbJGF IIAtL7W2nQSxtrxtGihQasw= X-Google-Smtp-Source: AA6agR4RCWr+OmHvsf5Vj3yHmct3WXBf4k9PSgUYPPdCQTG6FMOvaIn3j7K62RblsN/IOB1K4L4/Kw== X-Received: by 2002:a05:6a00:cc1:b0:52d:a29d:fb1 with SMTP id b1-20020a056a000cc100b0052da29d0fb1mr5663372pfv.56.1659683222769; Fri, 05 Aug 2022 00:07:02 -0700 (PDT) Received: from RD-3580-24288.rt.l (42-72-229-62.emome-ip.hinet.net. [42.72.229.62]) by smtp.gmail.com with ESMTPSA id i5-20020a056a00224500b00525343b5047sm2191616pfu.76.2022.08.05.00.06.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Aug 2022 00:07:02 -0700 (PDT) From: ChiaEn Wu To: lee.jones@linaro.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, lgirdwood@gmail.com, broonie@kernel.org, linux@roeck-us.net, heikki.krogerus@linux.intel.com, deller@gmx.de, andy.shevchenko@gmail.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: [PATCH v7 05/13] dt-bindings: backlight: Add MediaTek MT6370 backlight Date: Fri, 5 Aug 2022 15:06:02 +0800 Message-Id: <20220805070610.3516-6-peterwu.pub@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220805070610.3516-1-peterwu.pub@gmail.com> References: <20220805070610.3516-1-peterwu.pub@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 --- v7 - Add the second compatible string for 'mt6372' - Add 'mediatek,bled-exponential-mode-enable' property for enable the exponential mode of backlight brightness - Add validation for the maximum value of 'default-brightness' and 'max-brightness' --- .../leds/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 0000000..5533b65 --- /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 -- 2.7.4