From patchwork Fri Dec 6 17:24:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nick Chan X-Patchwork-Id: 848189 Received: from mail-pg1-f171.google.com (mail-pg1-f171.google.com [209.85.215.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8F7A8220687; Fri, 6 Dec 2024 17:28:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733506092; cv=none; b=mXby3TUWhEHdiqP3jISZgIgbWGvxjbdlxQfF7yPZQAyG65ycTCKyPVC/SjAshA0JRCWnrH4TEqhTm7ivlFOgeXhhb86uCDNorczW5IRhefkdLMTvJCdLr9QSKmEV1PrCbMQNeJ/LetghJWs3baG9w/2D1psoYkih/G6boRTffow= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733506092; c=relaxed/simple; bh=qfw9yW8p9gRYkvburwWaazwJ4STlL9xuMWKwEqIvHLo=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=B7jan5WIzn4N7r4pO9gBvxlAy8NihyHVgCQq7NkXA67kdN6LnzNPex+cFQy62/5w5IuKjVhaRClCJ/pj8eX3YjUAHhgeAX3EHkCUiubeSycADvaS/1q533wZsA3h2J66lVGT1kPguSkZ85soTnAUKHW4ie/CQjIvfIJtdoEeqP4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=POcMJzxI; arc=none smtp.client-ip=209.85.215.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="POcMJzxI" Received: by mail-pg1-f171.google.com with SMTP id 41be03b00d2f7-7f4325168c8so1511423a12.1; Fri, 06 Dec 2024 09:28:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1733506090; x=1734110890; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=qKs6SqWvOBPQFDy0xdKVrrMMEBXzqiAL0Gp7ECA7uFA=; b=POcMJzxIvcfoGrN8zKdef/n3w2NAzCc8ki6Se9DO16m+bDuaMEN+QAFyn10UrSeSVW Jjw3+D6NYwlTOFee3koOFeOriUmQlJGutAib41aHCMtNr7srLS1cry1Z34I2QAUGwOxi 7Iaeg2NCxV/QuBJ90iRs+n7nDYL3tcdDt8rRG7AcI3qcqi9gsMqyPvJaTfwbGvXUxO71 XSafberT0vMe2JgEOJrXiFlEtDM2MCHGA5c+LYVA8KlZ09b3h5cL83H5wAkwdlwa2hWr mDxnWXgop3U60N1EvgtCX87RwDQ3Sv4n53n7bVqt4SqWmGDV4KZFGc7RlopyyjRFcHiu Db0w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733506090; x=1734110890; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=qKs6SqWvOBPQFDy0xdKVrrMMEBXzqiAL0Gp7ECA7uFA=; b=cCwmUhk8yd7daJK/IVC1eU8l8iACVsQQYbAMpc6Y87jT0ehwdn+2HUROUplr7wIrdo DJmkzMvRkqhlwuf14DF1Dgw3coF4AhBsRKrdOVYMg7nNggJAlX4sKsUTAC+c/A+XyRpo PovACcdPtSYNCxHYs2ZeRa4WEChqwhJxzzd8eKnTybCxm2M7U6k+ic792gmh6xvoVGzR Q1s0hoHbJvHSct5P3dqKJqnBVpnG4dnv9FLYGfckSql5pRlP0I18As6w3ZGBB+cqT6eB Xis+RwIxQC2c3rd/ilyQUdlPi++PCQEg9ejjHZ/CBfVHZPe32qMsHzWvspWm4VoIG/Qm 6S/w== X-Forwarded-Encrypted: i=1; AJvYcCV0DF5QpAD07oH2ZbM/i58ndqUxtwP9TYulzESqcMTXHrD2EShLgol0k4wyHtgH+WVeeSiMnfZkzWztrDs=@vger.kernel.org, AJvYcCVg8xm/beJOaOG/Lgi++KAb5jxdpJkwArFfJ8bcrbUB4tOCu7zeqbMSnGypowLErFdps/t0/bVFEWm6/g==@vger.kernel.org, AJvYcCWsJOQbClYYF0wY/D6UvMt/6CxxYel3DGuE60blhbGHjtLplAnOt5qvZ0fl4mEO/NzbD9zzx5AqZiqt2Cpm@vger.kernel.org, AJvYcCX8Vm7fzzoV3e1p7MwZGPNOTVbiFEfQQyNYHp7LLu23jdBy9R0+Zb5oVEK0U9dgCwacCvXl8NaiSpxa@vger.kernel.org X-Gm-Message-State: AOJu0Yy2nikhLJpvdGRmhlMkRf6IMZP5RvFldlbKdsN1bUB75krG3RAy MJotByq+cQoUpcBaHH27ouX2Qn1bDNZW3CX0Hw1XjHp5s67s738E X-Gm-Gg: ASbGncsvm0YN5NJmK35OTmUrxIrmkbmbu1hyzby2vLM89/jVQhKCNXtpjMEf4rXUUj3 0PFMH9Tb8VfQlxsjrkrcjP47YtkD4Lhb8GGeO2PTo1e+pObMAc6jVWDXU/w8zWWn0HoXFb0tM0w i/uqLMhJFGMyxWxAvAXJqRZm9x6xeJLMnePF1jX/8la0tXkhd3cESfqqK3GfQN6UZfmrUdLrbJu EgHACcnpBXtPrRJnV8EzrWz0Fk2kFcdPtHfuck5v7E2PJb3z4L1mH9FRXNiT+n9 X-Google-Smtp-Source: AGHT+IHkO1RmdNJpR/98buAGJm0YvKeK4V7vOM0AkKSIB8tDWbwjkVo05dKTym9p80CfxeZrKTxMuw== X-Received: by 2002:a05:6a21:9a01:b0:1e0:cc8c:acc4 with SMTP id adf61e73a8af0-1e187136d40mr5795557637.37.1733506089650; Fri, 06 Dec 2024 09:28:09 -0800 (PST) Received: from localhost.localdomain ([49.130.54.203]) by smtp.googlemail.com with ESMTPSA id d2e1a72fcca58-725a2cc6950sm3204512b3a.173.2024.12.06.09.28.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Dec 2024 09:28:09 -0800 (PST) From: Nick Chan To: Lee Jones , Daniel Thompson , Jingoo Han , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Helge Deller , Hector Martin , Sven Peter , Alyssa Rosenzweig , Nick Chan , dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org Subject: [PATCH 1/3] dt-bindings: leds: backlight: apple, dwi-bl: Add bindings for Apple DWI backlight Date: Sat, 7 Dec 2024 01:24:33 +0800 Message-ID: <20241206172735.4310-2-towinchenmi@gmail.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241206172735.4310-1-towinchenmi@gmail.com> References: <20241206172735.4310-1-towinchenmi@gmail.com> Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add the device tree bindings for backlight controllers attached via Apple DWI 2-wire interface. Signed-off-by: Nick Chan --- .../bindings/leds/backlight/apple,dwi-bl.yaml | 55 +++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/backlight/apple,dwi-bl.yaml diff --git a/Documentation/devicetree/bindings/leds/backlight/apple,dwi-bl.yaml b/Documentation/devicetree/bindings/leds/backlight/apple,dwi-bl.yaml new file mode 100644 index 000000000000..fa3789b0b043 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/apple,dwi-bl.yaml @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/backlight/apple,dwi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Apple DWI 2-Wire Interface Backlight Controller + +maintainers: + - Nick Chan + +description: | + Apple SoCs contain a 2-wire interface called DWI. On some Apple iPhones, + iPads and iPod touches with a LCD display, 1-2 backlight controllers + are connected via DWI. Interfacing with DWI controls all backlight + controllers at the same time. As such, the backlight controllers are + treated as a single controller regardless of the underlying + configuration. + +properties: + compatible: + items: + - enum: + - apple,s5l8960x-dwi-bl + - apple,t7000-dwi-bl + - apple,s8000-dwi-bl + - apple,t8010-dwi-bl + - apple,t8015-dwi-bl + - const: apple,dwi-bl + + reg: + maxItems: 1 + + power-domains: + maxItems: 1 + +required: + - compatible + - reg + - power-domains + +additionalProperties: false + +examples: + - | + soc { + #address-cells = <2>; + #size-cells = <2>; + + dwi_bl: backlight@20e200010 { + compatible = "apple,s5l8960x-dwi-bl", "apple,dwi-bl"; + reg = <0x2 0x0e200010 0 8>; + power-domains = <&ps_dwi>; + }; + }; From patchwork Fri Dec 6 17:24:34 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nick Chan X-Patchwork-Id: 847922 Received: from mail-pg1-f180.google.com (mail-pg1-f180.google.com [209.85.215.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BCACA220698; Fri, 6 Dec 2024 17:28:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.180 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733506097; cv=none; b=WDV98C4BX14SwV0uJ3cywNQ2BOJJIQ+J0WA1N8isdxWFQ/FYUyWe0F9rcWafQntlxlo6HfCdaEGtP850RtSwLoY6DPWpgtgixbJ9+pyPC2mm5tjjKmMKhyIpzYRgV2brULj/b58rz+pCSOhmVCEuW7A9/iBpyEpJBZWbkho0rZc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733506097; c=relaxed/simple; bh=mMobX7/oh44I6gL0HhLv7iP0o+GmSInp/cnWKFSrhQs=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ODukGTX1Ai+nCSeNAFHM4LJgLfJkTCLicnVb/RM922sIOkW0O545yP8kTxutcooQhfJwj7+djjkiKqHSyKdtWiyEZVmo647xc2N81l/HeW+oMBwtCrinibt1nwYmkAB3R16tewwymfkbhc7Se0SRcEquh/HY93MWIq7ivpULI/8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=A6crsPCu; arc=none smtp.client-ip=209.85.215.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="A6crsPCu" Received: by mail-pg1-f180.google.com with SMTP id 41be03b00d2f7-7fcf59a41ddso1776920a12.3; Fri, 06 Dec 2024 09:28:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1733506095; x=1734110895; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=Mhx+3SpE0HhgGnWW6FB4h1qjMppjxy5kVkibP++35Cs=; b=A6crsPCugNcsgY9rBJnXXiP/137/NfsDvGr0sn38AHYH+LSC66JSraTj9DraQa5Ix4 lXHHsMybOFutn/CXPpi0D1hpuGFxoCAvKzypFCQPoQkQ5OAzYxIKoqnv4yHP/cWQBoR5 vh2qgOC8CGm9WA0cWhDmByu+MsLQQqmQlOydJAyA6trsRb9dRyqsIJDjDvOwXt48p/TA HDz9zGO0QlJLtdLR8gPe8Lr+qIuRT57Y2q2gcHidUx3Z+N9gTxvJ+nYLbqslyHdqu+tr hjToQI6t6zaeiNf0Q13jkOr9jDkYyAQ/5miL7WdZUprBWBfmjClGdVVbaQLd13BDuweX SOHQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733506095; x=1734110895; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Mhx+3SpE0HhgGnWW6FB4h1qjMppjxy5kVkibP++35Cs=; b=M1rQfErPpS//IgHlq38KB+/bAmVRXMgvAOSkQuGJdseat76KqBOp9VXi/d0o58U+e/ jWgEJqtXFPBjAwte7qBuPIiB6el+gRk6lXrs2YXdNfz33hsDSEieFk75+YHOAx8Ut8rj hjDEx0yn8+c9Pow22wxA44rTVPlovSnTY7q6mdnwX9PP9llj/4Q5EcUGTK0EYwivrY4w ee8/XAjQ4/DxKYQintpxsCZ35BEV4M/unbEcgigzDjFybBaycdZ17qM1RpaKD11wZnWz 759SNc36yRZwIOt6GSzFwkZ1WcV5qNuMWVFYZTmqLL/qw8gvbXU0uff2TVHVrxA2Uaju PSOA== X-Forwarded-Encrypted: i=1; AJvYcCUSz9tE15QA4I9mflYhvLaxZqnmu9s/5DZwM/X2EqR+AaleSkkHph44Wwn1nkeikRQMYjEDoxpQ7DYRdg==@vger.kernel.org, AJvYcCVaCYvP6C3fQ7RgeJ22cvYTiZvNi2igoCx5Ku3FY0Km+tUWZr8EaeNa9h4lDgj131o4WLICjvwDjW7x@vger.kernel.org, AJvYcCXte5HvdYHYU3jT/R89Rc9ecuvrTcoKNB2zjum1e1PgQElgZfRGvXskBEVQtqhK9yQcGbay2y0g5AMPCk0=@vger.kernel.org, AJvYcCXvpZXcrIlMYME1g2v8DDWDYlR3Ic8ACy8Nt/bj26HYBU5H85wtGXX9v3atH3RrchWj5La/mYEfw8UzxNx9@vger.kernel.org X-Gm-Message-State: AOJu0Yylz6AnSEPXIEjuHgaUy8aDDyx6K1toMRo0dYkz/3ZynnVns9tJ tPK9S7hiXSu8ALZlNBjGbhp8y3RuKeDnRIGJDHK11VaI8V7T9S7J X-Gm-Gg: ASbGnctLhzQTKUcMQtGxlicNPsgdyXoynNJ+DnHana54scjfsFuC2eQkkrbxGMfg0YQ Zs0BzRHPBYKpFXaayhtKdADY4/2nniXso4LuvUDnN6IYWUTMnvGWu7xLXeUKZDxAg0tWHj+6y6K 5hNr7o7E+nR+jFgD/ZYMD7toPKcMaDfDw9QI/eN4A8EELPsbwFnORLTaHQk0iLUa5h4VO6HWeDY J++qW7A6noGHMsht5yQ3XZov/2XLNbFvBuuxJwiE1f3n0JnJOVp8+Kr+fWZdGnP X-Google-Smtp-Source: AGHT+IHmRnmelG8M99ofNXhJAhbZ1joLqatv/c5LTXmUbLyOedvxPVbkzChlDj9sArumdzcvk7YaUg== X-Received: by 2002:a17:90a:c105:b0:2ee:db8a:29d0 with SMTP id 98e67ed59e1d1-2ef6ab07f61mr5535784a91.26.1733506094955; Fri, 06 Dec 2024 09:28:14 -0800 (PST) Received: from localhost.localdomain ([49.130.54.203]) by smtp.googlemail.com with ESMTPSA id d2e1a72fcca58-725a2cc6950sm3204512b3a.173.2024.12.06.09.28.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Dec 2024 09:28:14 -0800 (PST) From: Nick Chan To: Lee Jones , Daniel Thompson , Jingoo Han , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Helge Deller , Hector Martin , Sven Peter , Alyssa Rosenzweig , Nick Chan , dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org Subject: [PATCH 2/3] backlight: dwi_bl: Add Apple DWI backlight driver Date: Sat, 7 Dec 2024 01:24:34 +0800 Message-ID: <20241206172735.4310-3-towinchenmi@gmail.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241206172735.4310-1-towinchenmi@gmail.com> References: <20241206172735.4310-1-towinchenmi@gmail.com> Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add driver for backlight controllers attached via Apple DWI 2-wire interface, which is found on some Apple iPhones, iPads and iPod touches with a LCD display. Signed-off-by: Nick Chan --- drivers/video/backlight/Kconfig | 12 +++ drivers/video/backlight/Makefile | 1 + drivers/video/backlight/dwi_bl.c | 123 +++++++++++++++++++++++++++++++ 3 files changed, 136 insertions(+) create mode 100644 drivers/video/backlight/dwi_bl.c diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index 3614a5d29c71..e64cc3d51ac5 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -166,6 +166,18 @@ config BACKLIGHT_EP93XX To compile this driver as a module, choose M here: the module will be called ep93xx_bl. +config BACKLIGHT_APPLE_DWI + tristate "Apple DWI 2-Wire Interface Backlight Driver" + depends on ARCH_APPLE || COMPILE_TEST + default y + help + Say Y to enable the backlight driver for backlight controllers + attached via the Apple DWI 2-wire interface which is found in some + Apple iPhones, iPads and iPod touches. + + To compile this driver as a module, choose M here: the module will + be called dwi_bl. + config BACKLIGHT_IPAQ_MICRO tristate "iPAQ microcontroller backlight driver" depends on MFD_IPAQ_MICRO diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index 8fc98f760a8a..0a569d7f0210 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_BACKLIGHT_BD6107) += bd6107.o obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o obj-$(CONFIG_BACKLIGHT_DA903X) += da903x_bl.o obj-$(CONFIG_BACKLIGHT_DA9052) += da9052_bl.o +obj-$(CONFIG_BACKLIGHT_APPLE_DWI) += dwi_bl.o obj-$(CONFIG_BACKLIGHT_EP93XX) += ep93xx_bl.o obj-$(CONFIG_BACKLIGHT_GPIO) += gpio_backlight.o obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o diff --git a/drivers/video/backlight/dwi_bl.c b/drivers/video/backlight/dwi_bl.c new file mode 100644 index 000000000000..6dd7edf661fd --- /dev/null +++ b/drivers/video/backlight/dwi_bl.c @@ -0,0 +1,123 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* + * Driver for backlight controllers attached via Apple DWI 2-wire interface + * + * Copyright (c) 2024 Nick Chan + */ + +#include +#include +#include +#include + +#define DWI_BL_CTL 0x0 +#define DWI_BL_CTL_SEND1 BIT(0) +#define DWI_BL_CTL_SEND2 BIT(4) +#define DWI_BL_CTL_SEND3 BIT(5) +#define DWI_BL_CTL_LE_DATA BIT(6) +/* Only used on Apple A9 and later */ +#define DWI_BL_CTL_SEND4 BIT(12) + +#define DWI_BL_CMD 0x4 +#define DWI_BL_CMD_TYPE GENMASK(31, 28) +#define DWI_BL_CMD_TYPE_SET_BRIGHTNESS 0xa +#define DWI_BL_CMD_DATA GENMASK(10, 0) + +#define DWI_BL_CTL_SEND (DWI_BL_CTL_SEND1 | \ + DWI_BL_CTL_SEND2 | \ + DWI_BL_CTL_SEND3 | \ + DWI_BL_CTL_LE_DATA | \ + DWI_BL_CTL_SEND4) + +#define DWI_BL_MAX_BRIGHTNESS 2047 + +struct apple_dwi_bl { + void __iomem *base; +}; + +static int dwi_bl_update_status(struct backlight_device *bl) +{ + struct apple_dwi_bl *dwi_bl = bl_get_data(bl); + + int brightness = backlight_get_brightness(bl); + + u32 cmd = 0; + + cmd |= FIELD_PREP(DWI_BL_CMD_DATA, brightness); + cmd |= FIELD_PREP(DWI_BL_CMD_TYPE, DWI_BL_CMD_TYPE_SET_BRIGHTNESS); + + writel(cmd, dwi_bl->base + DWI_BL_CMD); + writel(DWI_BL_CTL_SEND, dwi_bl->base + DWI_BL_CTL); + + return 0; +} + +static int dwi_bl_get_brightness(struct backlight_device *bl) +{ + struct apple_dwi_bl *dwi_bl = bl_get_data(bl); + + u32 cmd = readl(dwi_bl->base + DWI_BL_CMD); + + return FIELD_GET(DWI_BL_CMD_DATA, cmd); +} + +static const struct backlight_ops dwi_bl_ops = { + .options = BL_CORE_SUSPENDRESUME, + .get_brightness = dwi_bl_get_brightness, + .update_status = dwi_bl_update_status +}; + +static int dwi_bl_probe(struct platform_device *dev) +{ + struct apple_dwi_bl *dwi_bl; + struct backlight_device *bl; + struct backlight_properties props; + struct resource *res; + + dwi_bl = devm_kzalloc(&dev->dev, sizeof(struct apple_dwi_bl), GFP_KERNEL); + if (!dwi_bl) + return -ENOMEM; + + res = platform_get_resource(dev, IORESOURCE_MEM, 0); + if (!res) + return -ENXIO; + + dwi_bl->base = devm_ioremap_resource(&dev->dev, res); + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = DWI_BL_MAX_BRIGHTNESS; + + bl = devm_backlight_device_register(&dev->dev, dev->name, &dev->dev, + dwi_bl, &dwi_bl_ops, &props); + + if (IS_ERR(bl)) + return PTR_ERR(bl); + + platform_set_drvdata(dev, dwi_bl); + + bl->props.brightness = dwi_bl_get_brightness(bl); + + return 0; +} + +static const struct of_device_id dwi_bl_of_match[] = { + { .compatible = "apple,dwi-bl" }, + {}, +}; + +MODULE_DEVICE_TABLE(of, dwi_bl_of_match); + +static struct platform_driver dwi_bl_driver = { + .driver = { + .name = "dwi-bl", + .of_match_table = dwi_bl_of_match + }, + .probe = dwi_bl_probe, +}; + +module_platform_driver(dwi_bl_driver); + +MODULE_DESCRIPTION("Apple DWI Backlight Driver"); +MODULE_AUTHOR("Nick Chan "); +MODULE_LICENSE("Dual MIT/GPL"); From patchwork Fri Dec 6 17:24:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nick Chan X-Patchwork-Id: 848188 Received: from mail-pl1-f177.google.com (mail-pl1-f177.google.com [209.85.214.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 84DE71FFC73; Fri, 6 Dec 2024 17:28:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.177 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733506102; cv=none; b=HMVIdLF++rMrgAAgHXB/X1fhnXBOmtS9I524GKeHKLw5VbCHk3sDQ2irjX1PaBPeXWjLhnTDtljKbnJstzbpwyiQpKZUwgIvo+Pos4ZKavq2ucCVcGbGdDfPvUzNjysif6b0EoY0CvZd/FyK2NNC573GK3YMNLqKJMhacWOYvrw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733506102; c=relaxed/simple; bh=V1gxC+7pFmhwcsVRYLSmWj0bXwQS8MKVVfihUEUE05E=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=b5zWhud+BhRVxX/iLdljX1MDduQ8w8Rbt/+hNyWbVJE9DWBIjRIMfkjkhJQrQJ7TuKWB9zAALYeXmfsW/YMgWlkF4t9J0tH5MmAeeoPYSoXEdWLtenbe8LH0TKHNJmMzdJU+113IvZ3T9/7THZpzWcQVb4g170MIcHeBYUDZrdU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=fDHO91Q3; arc=none smtp.client-ip=209.85.214.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="fDHO91Q3" Received: by mail-pl1-f177.google.com with SMTP id d9443c01a7336-215666ea06aso28835875ad.0; Fri, 06 Dec 2024 09:28:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1733506100; x=1734110900; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=TFVSrkNiEMMJAigz7OiMiNZjcf3pYxRxO/MhDZIhBgc=; b=fDHO91Q3MC8FlmZ7AFeH2zCTVsV5MoxvQ7iIk0Io/D88jRLOQl7R5bPZectPbmdOfC /171er6CMd3IwJVKSHdvJJr3j3ZqAaLhC4q+5FZCpcYFCpmxeJy9rJ0ywmCQuhCDhGqW xveNy8IgJO24rYK2k5E5Jlxqhy/nTOskMsh/lcSNl1+0eDyZ1S227j7TkO28cExM3Pg8 BcpVxFNoZbjxxaaWJJ8NW7KssLVMYyU1JJRVArkmgvQZIhlJbp0xUqJhgjb6Z18lVH+P YI6ejNIGltrFTMfX6zIdi04BRgtEZha84vOOffXE4B0xMHCW3G2nogZPnsoWfUF1/hbt qlrQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733506100; x=1734110900; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=TFVSrkNiEMMJAigz7OiMiNZjcf3pYxRxO/MhDZIhBgc=; b=TWMh4ACag7VpaA3UlVU4XZMtnK0RB35tyiCfJelfX+BVEPhZ6LPt7ZFxp1Iiuqnbct AEGHjiwLFKpKRTwjOXg3Q4jyFTMGNnHQsijIbokIkNjWmb1ithZ1enjB2gDSOMAIx6zk XAfSgx1M0o7bNjFjPfG/lkQdWqL7pnmqXVYlDj7ieHYfCQZHFAkushi2WmnX3ABefJTq n2xh2t+fObPwuxOE5nop3oQkCh9pRUFNnp3T8iSCTcNMixvDXMGvIriAvgLw2ejlkoSe eu/W5jH8mhSxEDDpsSQ3kBH3/MBpNNjFdONL7FMCWdm8vHpYI5pBtKRKu8jZp36QPTGW 1BUA== X-Forwarded-Encrypted: i=1; AJvYcCVMtvxXDqAxpRqCAaZZH2zA6rLBuQUHrB7sAAgP7ZQn7QdGuGkIZuhvNsuVHizvJSghyUBOUHQx2MT4tw==@vger.kernel.org, AJvYcCVug+f51Dj8Ex+T5kkuMPQ+APPyQbnoMEgslrSfOsJIbc2S8MzYNtEr+tW92hfLMuF/H9nx0m4Nm4BRPouF@vger.kernel.org, AJvYcCXFRojS7k7q2SuWMoTnOzMWqchRJW6hrpJa9Df4auzZ9+6lSWdYiPUl4N6tCaL9Fb65z3Q1URFaAkS6lpo=@vger.kernel.org, AJvYcCXY9rgpgVda9RSHSBNz2ngmEm3weVxc5fkZ+8BFZukA/C4zNg/FFPQL9ifHsKEgFik5xHqnrMVeokMJ@vger.kernel.org X-Gm-Message-State: AOJu0YzAuRqHuN+oEHaGZs99cpLEHyBu5RsNWB2T96LwqUnZUeVIP0VH sP2Kx0k7oIlBjmb1qlTc04Qbt3qGdSSbUHg+Zt+Wwin96Qr62yrL X-Gm-Gg: ASbGncthxhmBdZm5QPp/NgpYAEEKn6NK6Qsk9rt/wasxMT4KGEPP7mQyPUrJbuRsRZY VUwuRWFH8h4uQ6gr73Rbaf5608QUECDHRjOC18QN3pgMvuItdXcnTMVQIF9HrAEJJlyLW/ADFqZ pA5RDhWYODaUzBGttKqLVJ4w/luzFGnETK0I1vnvPhy4p5QzZqBKRXT99lQOuyAse6f8rU8SRR6 WcxwTBTcU1ujCob+Fwe3uaTWRAYkfreWhyWv2D4PfFTWhZRetUv4WFG3886XbC8 X-Google-Smtp-Source: AGHT+IEVb+55XJwsVSf3sPuxfD1Q4oPqF1cheGO9d/Bp3KK/wuSlgII2poZhwuZv0OaHB03V7/rOhA== X-Received: by 2002:a17:902:e3cd:b0:216:11cf:7b1 with SMTP id d9443c01a7336-21611cf2958mr46087885ad.15.1733506099695; Fri, 06 Dec 2024 09:28:19 -0800 (PST) Received: from localhost.localdomain ([49.130.54.203]) by smtp.googlemail.com with ESMTPSA id d2e1a72fcca58-725a2cc6950sm3204512b3a.173.2024.12.06.09.28.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Dec 2024 09:28:19 -0800 (PST) From: Nick Chan To: Lee Jones , Daniel Thompson , Jingoo Han , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Helge Deller , Hector Martin , Sven Peter , Alyssa Rosenzweig , Nick Chan , dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org Subject: [PATCH 3/3] MAINTAINERS: Add entries for Apple DWI backlight controller Date: Sat, 7 Dec 2024 01:24:35 +0800 Message-ID: <20241206172735.4310-4-towinchenmi@gmail.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241206172735.4310-1-towinchenmi@gmail.com> References: <20241206172735.4310-1-towinchenmi@gmail.com> Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add MAINTAINERS entries for the driver. Signed-off-by: Nick Chan --- MAINTAINERS | 2 ++ 1 file changed, 2 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 1e930c7a58b1..36de76bc6fd4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2204,6 +2204,7 @@ F: Documentation/devicetree/bindings/pci/apple,pcie.yaml F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml F: Documentation/devicetree/bindings/power/apple* F: Documentation/devicetree/bindings/pwm/apple,s5l-fpwm.yaml +F: Documentation/devicetree/bindings/video/backlight/apple,dwi-bl.yaml F: Documentation/devicetree/bindings/watchdog/apple,wdt.yaml F: arch/arm64/boot/dts/apple/ F: drivers/bluetooth/hci_bcm4377.c @@ -2221,6 +2222,7 @@ F: drivers/nvmem/apple-efuses.c F: drivers/pinctrl/pinctrl-apple-gpio.c F: drivers/pwm/pwm-apple.c F: drivers/soc/apple/* +F: drivers/video/backlight/dwi_bl.c F: drivers/watchdog/apple_wdt.c F: include/dt-bindings/interrupt-controller/apple-aic.h F: include/dt-bindings/pinctrl/apple.h