From patchwork Thu Nov 16 10:53:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Flavio Suligoi X-Patchwork-Id: 744532 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=asem.it header.i=@asem.it header.b="UytH6+Zl" Received: from EUR05-AM6-obe.outbound.protection.outlook.com (mail-am6eur05on2078.outbound.protection.outlook.com [40.107.22.78]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C0CF81B5; Thu, 16 Nov 2023 02:53:32 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=i6dX/GRSQtb06Ykg8uhBHLel5PKR++fW3Q6V1QSEsHlRopSJFZdRuMFakR7CfAh9lL0cQ3dAkltfpvp5IgQcrXp94liJEMdmOEDuIe8kvQhZzXajaMm9/T9AXS9wmvl4NaAvuNh5/e+1AV6QG8NJZxrHgUsCF29N1vhaxMfNwLIFzSAbEJsiu4eeK2ippDm7e0a+FCkM0M0kEOyRoMRS1v5lmYkDjeXgLUtRMwkJa6YH1lRPPAAokc6EoYK5wISk9dysni0Ff7lYpFyI+xUvImzAlAOgOzWXZCzJHr/gTWDoH6a5g74uoV8FlxqoqkUdRtMO59685s6aK8XN/D4k7A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=XXGX5/3lV8ls++zZ8s81a873PdqAXsZCi8zrTLpHNn8=; b=UyYr4P/tFAxoRbp9CPUYO8K6JzTL+VSg7lEI04fUXBqGEdnUzBCPMpCeT4qXfi95OqzlSqqxMWsH88m8aqntTzGEgJR+D1Qh5PJE/VVf9f8ihMDTvlITa7yfvSIVP1lUCioiSss02YE7o0Twzo94M3HyC6nzDvPF5UBZ6uP+U5KXypuylc8ziMecJNOtbL2Ji3yPA+E4hYRM/FojaGztQ9M8jdYAYsQA1cCK1XF0UJN9IASzoTewsRHRNYd2KWAa5JAn7EnRgSV09TGjd+lc/feWqwzDA3LTibpsN93o+GiTRqP/Ci8MxeCnOuFjZAhPWuHIZlZdqSn1QSKMCMaTBQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=softfail (sender ip is 151.1.184.193) smtp.rcpttodomain=vger.kernel.org smtp.mailfrom=asem.it; dmarc=fail (p=none sp=none pct=100) action=none header.from=asem.it; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=asem.it; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=XXGX5/3lV8ls++zZ8s81a873PdqAXsZCi8zrTLpHNn8=; b=UytH6+ZlMF3FwS2/ib7d5186NeA3iqiaSbzZln+4s3DMJSoYkbiTH8OgXikAG6iTrUV7fOJMWQwrGI912QtvVknWYF0B8OKYnPDlGPBmstiXM4V2b8nW/1QEYQeTC3qLCuQ31QnmwfHJa9Pl8oHgN7zZuNoO3Ef0fQNz+BbkFEA= Received: from AS4P189CA0030.EURP189.PROD.OUTLOOK.COM (2603:10a6:20b:5db::17) by VI1PR01MB6384.eurprd01.prod.exchangelabs.com (2603:10a6:800:15e::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7002.18; Thu, 16 Nov 2023 10:53:29 +0000 Received: from AMS0EPF00000198.eurprd05.prod.outlook.com (2603:10a6:20b:5db:cafe::f3) by AS4P189CA0030.outlook.office365.com (2603:10a6:20b:5db::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7002.18 via Frontend Transport; Thu, 16 Nov 2023 10:53:29 +0000 X-MS-Exchange-Authentication-Results: spf=softfail (sender IP is 151.1.184.193) smtp.mailfrom=asem.it; dkim=none (message not signed) header.d=none;dmarc=fail action=none header.from=asem.it; Received-SPF: SoftFail (protection.outlook.com: domain of transitioning asem.it discourages use of 151.1.184.193 as permitted sender) Received: from asas054.asem.intra (151.1.184.193) by AMS0EPF00000198.mail.protection.outlook.com (10.167.16.244) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7002.19 via Frontend Transport; Thu, 16 Nov 2023 10:53:29 +0000 Received: from flavio-x.asem.intra ([172.16.18.47]) by asas054.asem.intra with Microsoft SMTPSVC(10.0.14393.4169); Thu, 16 Nov 2023 11:53:27 +0100 From: Flavio Suligoi To: Lee Jones , Daniel Thompson , Jingoo Han , Helge Deller , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, Flavio Suligoi , Conor Dooley Subject: [PATCH v7 1/2] dt-bindings: backlight: mp3309c: remove two required properties Date: Thu, 16 Nov 2023 11:53:18 +0100 Message-Id: <20231116105319.957600-2-f.suligoi@asem.it> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231116105319.957600-1-f.suligoi@asem.it> References: <20231116105319.957600-1-f.suligoi@asem.it> Precedence: bulk X-Mailing-List: linux-leds@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-OriginalArrivalTime: 16 Nov 2023 10:53:27.0512 (UTC) FILETIME=[2108CD80:01DA187B] X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AMS0EPF00000198:EE_|VI1PR01MB6384:EE_ X-MS-Office365-Filtering-Correlation-Id: 2ed9ce19-98ac-4ab8-91c0-08dbe692448a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:151.1.184.193; CTRY:IT; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:asas054.asem.intra; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230031)(136003)(396003)(376002)(39840400004)(346002)(230922051799003)(64100799003)(451199024)(1800799009)(82310400011)(186009)(36840700001)(46966006)(86362001)(70206006)(966005)(316002)(110136005)(54906003)(36756003)(70586007)(450100002)(8676002)(83380400001)(4326008)(8936002)(6666004)(336012)(2906002)(47076005)(26005)(1076003)(36860700001)(41300700001)(107886003)(2616005)(5660300002)(40480700001)(478600001)(356005)(81166007)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: asem.it X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Nov 2023 10:53:29.0727 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2ed9ce19-98ac-4ab8-91c0-08dbe692448a X-MS-Exchange-CrossTenant-Id: d0a766c6-7992-4344-a4a2-a467a7bb1ed2 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=d0a766c6-7992-4344-a4a2-a467a7bb1ed2; Ip=[151.1.184.193]; Helo=[asas054.asem.intra] X-MS-Exchange-CrossTenant-AuthSource: AMS0EPF00000198.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR01MB6384 The two properties: - max-brightness - default brightness are not really required, so they can be removed from the "required" section. The "max-brightness" is no longer used in the current version of the driver (it was used only in the first version). The "default-brightness", if omitted in the DT, is managed by the device driver, using a default value. This value depends on the dimming mode used: - for the "analog mode", via I2C commands, this value is fixed by hardware (=31) - while in case of pwm mode the default used is the last value of the brightness-levels array. Also the brightness-levels array is not required: - in "analog mode", via I2C commands, the brightness-level array is fixed by hardware (0..31).; - in pwm dimming mode, the driver uses a default array of 0..255 and the "default-brightness" is the last one, which is "255" NOTE: there are no compatibility problems with the previous version, since the device driver has not yet been included in any kernel. Only this dt-binding yaml file is already included in the current v6.7.0-rc1 kernel version. No developer may have used it. Other changes: - improve the backlight working mode description, in the "description" section - update the example, removing the "max-brightness" and introducing the "brightess-levels" property Signed-off-by: Flavio Suligoi Acked-by: Conor Dooley --- v7: - add missed patch history - add missed "Acked-by" added in one of the previous version v6: - check and resend for updated kernel 6.7.0-rc1 (nothing changed compared to the previous versions) - add this patch to the same patchset of the MP3309C device driver Note: the patch related to this file was previously a separate patch and sent in two versions (v1 and v2). It has now been included in this patchset, starting with the version v6. v5...v3: - non-existing versions (the last was v2, the next is v6) v2: - add more explanations in commit message, about the the non-existence of compatibility issues with the previous versions of the yaml file v1: - first version .../bindings/leds/backlight/mps,mp3309c.yaml | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/Documentation/devicetree/bindings/leds/backlight/mps,mp3309c.yaml b/Documentation/devicetree/bindings/leds/backlight/mps,mp3309c.yaml index 4191e33626f5..527a37368ed7 100644 --- a/Documentation/devicetree/bindings/leds/backlight/mps,mp3309c.yaml +++ b/Documentation/devicetree/bindings/leds/backlight/mps,mp3309c.yaml @@ -14,8 +14,8 @@ description: | programmable switching frequency to optimize efficiency. It supports two different dimming modes: - - analog mode, via I2C commands (default) - - PWM controlled mode. + - analog mode, via I2C commands, as default mode (32 dimming levels) + - PWM controlled mode (optional) The datasheet is available at: https://www.monolithicpower.com/en/mp3309c.html @@ -50,8 +50,6 @@ properties: required: - compatible - reg - - max-brightness - - default-brightness unevaluatedProperties: false @@ -66,8 +64,8 @@ examples: compatible = "mps,mp3309c"; reg = <0x17>; pwms = <&pwm1 0 3333333 0>; /* 300 Hz --> (1/f) * 1*10^9 */ - max-brightness = <100>; - default-brightness = <80>; + brightness-levels = <0 4 8 16 32 64 128 255>; + default-brightness = <6>; mps,overvoltage-protection-microvolt = <24000000>; }; };