From patchwork Sat Dec 7 13:03:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nick Chan X-Patchwork-Id: 848345 Received: from mail-pl1-f178.google.com (mail-pl1-f178.google.com [209.85.214.178]) (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 5487714F9EB; Sat, 7 Dec 2024 13:04:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.178 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733576697; cv=none; b=TmYwZCZs+Uz8xLOJJSmh9zosGCVDepsaMpCDbxCcNhvj+/RA2/ZGm7D1YG4F5P1BESYdAgZ874aX26u3yDKKOWjMiAHnyFfIVXPNsu3J14L3gJWgpkxWQTzjwBjiC2BVGnYcMo75t79Oub5pacQ8Z17YlsYwvnZd54t8Omyp8MI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733576697; c=relaxed/simple; bh=a+ffvi8Pvp87P/1lPCLBagqzbCZkXpLPTrqcZ5m6KYI=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uk5txY5DBGBShNmkqQMBipEUTh1oAkHQgGAGo2ArNgL7/x3Bv62eYNKfjPrCxc1maW4iEAbulBcHJ1Akoc/0GZmKOicrJ0VKRlGVqVarewKdVWHYfhu96KZEEzc43iEUFTNLAQ2I+P8C/jszNPFJ4oc4s0hvtLUWl7tHIK9LTzc= 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=mEKlZ67r; arc=none smtp.client-ip=209.85.214.178 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="mEKlZ67r" Received: by mail-pl1-f178.google.com with SMTP id d9443c01a7336-215c4000c20so30206425ad.3; Sat, 07 Dec 2024 05:04:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1733576696; x=1734181496; 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=GI/+h7CCb9MgzwwHAdhpRI41/S9p/ThoHoKHndB4Jrg=; b=mEKlZ67rVyl4WyQgsc+XcXPOZSogLvaY9CaKi+RFYZal57Q5KMZDhZiDxCxAAjOZVU +MGFsxPKvDo3BB3d2FibvBS5Wx+ln8G6oEjAAb6jRlz6kqEwugtIJjV7vNEFhszsoImW UpT+4Zw7PCNmL7/Wp8Fs5BE83xn5RkRo6Ou2rj+YQoAA2uRPiryjv20CgHk8s/8oS/fj iM3NltrexeVIn4nEH8QaKeNVWh2WzHkTNwOEfLOP8vqGgMzoht2bgsCtKp+2d9nJrc/1 /HR1rlT8CbMAJ7OiC/kjE9K4pLvJJ93mYZu1qbGQCGgEaVJfcPscZ+/mMllo2kKe3CrF TqHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733576696; x=1734181496; 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=GI/+h7CCb9MgzwwHAdhpRI41/S9p/ThoHoKHndB4Jrg=; b=OSZU7wiw/uY8yWVV9c3JSm/6ON1+dkDyn7SI8eRg3iP05CeMb9iUnvwFLPWfRQkRht gpUxPiGsJjXvLZqKwYmDfj7qXvq1wKlco2PAWg31x4PkFUYohaVVj022SwybZcYwFhl9 npH1WCpBJttFAHAWhAalrTNcgjto0BJg34DnCNPbRtb2Er7TmpdAS+DyytdcmFb7XW87 XoO+NH1r/a4VZTzucM4KJ7Fl9ro4ugpQguQd7c4FWdprodifMnNFalXBPjVo0sWI4zR4 SQ6PzSSenVrocehEOY5WIxe//VJGFtdrFCEczy4zJNhB7vSMeAeOPeYD1lDi2GwhkBpx 6EsA== X-Forwarded-Encrypted: i=1; AJvYcCViIIjUyX8Mr6Uvx1UAp315M/9zRpVcVNM0DSoH/YwTDHGFzhgU6xm+SFAAMqz+oskyXBy9xMePRNATJaQ=@vger.kernel.org, AJvYcCVs5uwsF/ClRw85yd3sQw7Z+7ENZlzQuJVQEwizNxLiIRM2m/uQL7nYcGgkGg7WSXxbwUFcWDUNYIEB@vger.kernel.org, AJvYcCW4/iao6BM+QM+QL/sUscEN62GBsIWSlmobMMGyBZJfi6QUxgqFLBR332KOq3Xd3LSAa04tSskcD0ehrg==@vger.kernel.org, AJvYcCWEnBrvATl1Pxx2msNmrDPLRHEPvUfSdwNO5nrDydjv17aaAwjkQHxoTyijnHX9ZdqMseDeE9EHdS1zZynx@vger.kernel.org X-Gm-Message-State: AOJu0Yy5R27jN5Tj1y9J8Wr5lyt2GrK+peqLEfY5rnlIzspZROmp1XAw CnbfOUsiUpbBBvtJqFW9bt6RQ3xolkQQH/KvAn2QsCF9VcLxtwqc X-Gm-Gg: ASbGncuZPeHG0wOx8XglUN/Oedaqw8B5ExRpn/7hGdF1XZRE2Vwn2U4FsBHH8TZHG3y 76XhK5drXta3Nkcv6UTXKlj/5D/0gZxjwA6WE05JMvDpA9pki/bVV1MF/F19/I1Hwoq369S/6LQ DmQg8wpGii2ypTIZkFT2xENhWumQh/s+1Lamwgc95imTkCYhyM9cQUKe4VtICVtCj9303K6eanz KrjNLvjOETvERcMiXKPrKR9+tLz7DVEZZkPmZlbaCwZn64zoiVJNiDFJwuJlhII1Q== X-Google-Smtp-Source: AGHT+IHSBn/pq77OCjYDKU4tqjEmdqZd8B5Zl+VAbPbKPPsQr8JFMXWjlUkJ7t8BCQ5XsnHByPmm6Q== X-Received: by 2002:a17:902:c40a:b0:211:ce91:63ea with SMTP id d9443c01a7336-21614d35675mr103444335ad.15.1733576695885; Sat, 07 Dec 2024 05:04:55 -0800 (PST) Received: from localhost.localdomain ([59.188.211.160]) by smtp.googlemail.com with ESMTPSA id d9443c01a7336-21628c59730sm12779715ad.105.2024.12.07.05.04.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 07 Dec 2024 05:04:55 -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 v2 1/3] dt-bindings: leds: backlight: apple,dwi-bl: Add bindings for Apple DWI backlight Date: Sat, 7 Dec 2024 21:03:14 +0800 Message-ID: <20241207130433.30351-2-towinchenmi@gmail.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241207130433.30351-1-towinchenmi@gmail.com> References: <20241207130433.30351-1-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 | 54 +++++++++++++++++++ 1 file changed, 54 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..9d4aa243f679 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/apple,dwi-bl.yaml @@ -0,0 +1,54 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/backlight/apple,dwi-bl.yaml# +$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 + +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 Sat Dec 7 13:03:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nick Chan X-Patchwork-Id: 848186 Received: from mail-pg1-f173.google.com (mail-pg1-f173.google.com [209.85.215.173]) (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 4BD6C1482E1; Sat, 7 Dec 2024 13:05:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.173 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733576702; cv=none; b=N7aMKunbrM9DOVCvCDJPk0UZ5vR335j4yasbuNHrn/8+/WHRbbDUpxs+gakKlF8HSMQ9uyMFN9fBn5yPrPSFAYoVTnJ/k3TaHoBZUkiVsNp1J9sjSzkywfnGwjZV8gUCZUMAqq/gCQTISeZMDAgD04z08CPZGFfGIx1Dz0mDCzM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733576702; c=relaxed/simple; bh=1UUx9CtJHDQtABTlOcNtN/R3mQix+/51t9fd/QJmg84=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lQTV6MrbVvr1V2ZVDXz+l+9URiQm+pi6uSWcavWhYKj1MlP51b4579NYmwFVbNlefVYO5EGOWvWMJdkTpLFbJ1SZh6Q0SuSVONf52YDhnzcftYh05iIEUGr7sxPK6FsONn1Ra1qoGfKMU8ot1NzD74dBGGdfAy7Ui58WTmo888M= 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=kfvKuj/r; arc=none smtp.client-ip=209.85.215.173 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="kfvKuj/r" Received: by mail-pg1-f173.google.com with SMTP id 41be03b00d2f7-7fd10cd5b1aso2220453a12.2; Sat, 07 Dec 2024 05:05:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1733576699; x=1734181499; 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=qHIXzgbPPD4fstMUw0DICfprbDFs+kDoHZiZBpx82hE=; b=kfvKuj/rUkj7CGsrQt1Fo6tbxAHx5vwT7yuNC4G9vZujN0EiJKzVAE+IJO0XgYGhS/ BvEsfeQQ+XXCKqS32CVKmhgMTg50gxpfWNI4e0/u7uQ993WC5x+AcnWcpEybUTFb7GVG LLgVM61vSC/koN/f9tX3OdcXCYoDEViXj1lbeHgjhOzylwveT6F4vqaehY+IE5Sf2/6e AwmGg04I2pQ+OM7oahjyeqlEnkptWF+FdQbo5Huv70LI2jKv0lU9h9hrF4JprvMx9gde Ia0WbdDKGTCdqELg11DIsd1brPN9LT0znROotIH7r1pEKc3wRMnE4JepTw6OlIUYhTtY kzZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733576699; x=1734181499; 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=qHIXzgbPPD4fstMUw0DICfprbDFs+kDoHZiZBpx82hE=; b=ur+97QFXwg2KRD0Xm8G4IEEbGlgU8IjdC6chj/U07/kFVtGdasRKD7UqxCv6a/xQ97 RwIH5imR2oD2LQSPw2FsGAYMG9JXfpuGenxBt7+FZEpvx/OWooeyNyggYDcsffuyT42N fGsSKiZb2ffKMg1yIC3GubJCgAFhdqeHyEo5PCRnLw9zbZ9vCJJgUgo55sMEkgCbjhNM KZWd0owh8dZ2uvryztNOk5DWNqtEPWKFRBkJLVK6vQVGeVurIDNMRwH5jiyxKbw/a+Ww +SOhy+m3csKh5mkv9LJ6aVFBM5ZZJZpR3WxK0mFBdipm3VLsMLs4qBE53aoMfasyLhoH GfAg== X-Forwarded-Encrypted: i=1; AJvYcCUj9WO5CGJ9S1w/S6msnYbfhAo0liYfeoi5EnCuCWEIuplBY5ASPhydRO3EKeLON/4CTPTiHse835YRjHU=@vger.kernel.org, AJvYcCX/5joQrk/zCyAmJMItizP9hb8S2T4+UsXL4hDeHLiqnlwjYzuxMqts7xCvggsSh6xf1bEESKvvTYjP@vger.kernel.org, AJvYcCX68Se7DTUX93lgXC1ddfxEZ288icnJmlHZXAZxeylcggeKPdZme8s3XGMczOj3CGMH7m9YgiPAeVTSqgTE@vger.kernel.org, AJvYcCXjbCyNt1nsOi24T/Jj94LnrwLMCYUQfJ3GSz0FAdTG67XeA5B9uvHKGt2a3/C76SLY7TjUeQEV5AUL3g==@vger.kernel.org X-Gm-Message-State: AOJu0YzEDAGNjY0pRo0+rhMUcN7VLcUTiUfT4aWNgt10uXWu9Ql2BYUe F97Mgl6R22O+08olZGsuvKxnCXN2o6eQiX6ADcsEKFhYsNCKoQwl X-Gm-Gg: ASbGncsBw0uieWIlLFXuGA9txJRRLEIj2+C6/9b8os9xTWvz8xi/atYbxN1ZEVnMSFg Lk1fs1bPFWjGxQ0AxS58drY6yxRiCHgs09x2v1AzOI1HcN3qw3rP8Mr+zgKQMPK/R/i/nG61TR9 ZDIZ2QpHd2BJbhXSVO+WjGQG+j+mX5HT1AKMX0u8+PXdUP2QK89XyHOIX0zQWL62fw7883UnPyj X9gxHvRbB5oeS/Twm+Hsl+hh6nasbKm9abSzRUDr5tq9EkqESOivkMipuTrmacgdQ== X-Google-Smtp-Source: AGHT+IEDQeoGt4Ew7k231hhERT2d9WsKRLc2X38liJ7cpCgF7Y2V2yw87HksK3OB6TyrAZV3ss+7hw== X-Received: by 2002:a17:902:dacd:b0:216:1b4c:7396 with SMTP id d9443c01a7336-2161b4c7520mr77087385ad.3.1733576699637; Sat, 07 Dec 2024 05:04:59 -0800 (PST) Received: from localhost.localdomain ([59.188.211.160]) by smtp.googlemail.com with ESMTPSA id d9443c01a7336-21628c59730sm12779715ad.105.2024.12.07.05.04.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 07 Dec 2024 05:04:59 -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 v2 2/3] backlight: dwi_bl: Add Apple DWI backlight driver Date: Sat, 7 Dec 2024 21:03:15 +0800 Message-ID: <20241207130433.30351-3-towinchenmi@gmail.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241207130433.30351-1-towinchenmi@gmail.com> References: <20241207130433.30351-1-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 | 124 +++++++++++++++++++++++++++++++ 3 files changed, 137 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..d4bfd74b3129 --- /dev/null +++ b/drivers/video/backlight/dwi_bl.c @@ -0,0 +1,124 @@ +// 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); + if (IS_ERR(dwi_bl->base)) + return PTR_ERR(dwi_bl->base); + + 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 Sat Dec 7 13:03:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nick Chan X-Patchwork-Id: 848344 Received: from mail-pl1-f169.google.com (mail-pl1-f169.google.com [209.85.214.169]) (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 0E4A8153BFC; Sat, 7 Dec 2024 13:05:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.169 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733576705; cv=none; b=joPqQA/RJqyU+YrEmJKUTfK9erAsfnBHV9el3iGIpIoSkR/5HL3oMOwiDRdsYyRypV6Mwy5jVvzY74mYKzr/ZRv8yVVcChWHxOR/MLWZtBg6FHtfnQJ5+bC28S5Qm8sJmgOg39YoXt2FNVvEakaNfSQ7hScQyBR1AP9LRzUSy8E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733576705; c=relaxed/simple; bh=V1gxC+7pFmhwcsVRYLSmWj0bXwQS8MKVVfihUEUE05E=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LtPhNxhM/nK+0AeO+0MPJuFmVtQ6runG/5WwESL0gPO1BY52Zd/Lqh17kx1Be5Yy+S2KNgvDFNJcKlaIA9blvIKDuM16raEFfWObewyKBIXqBvc+/8klza3RgrQvKOzVEfoQ9WShw/UaDUIwOvne7JmPbTlW9tFj8GVfYRTfoOk= 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=L6la+J2W; arc=none smtp.client-ip=209.85.214.169 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="L6la+J2W" Received: by mail-pl1-f169.google.com with SMTP id d9443c01a7336-215b45a40d8so25116565ad.1; Sat, 07 Dec 2024 05:05:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1733576703; x=1734181503; 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=L6la+J2W4S9j0Zx0YaouSsTbvOUO6/4QDmiRfRgH0/q5V2rjSByJUCtqwSeP01pikZ loxvR1bTyvdCIu2SSr1HRaU+p2uw1owMnbxFWE7wB+6xANkUS+KqomGStSShwVZHpMH6 vWvAdHJ36t21ttIWM7ieG21tIU34Myt3zFCBtyG+ihHZDRA/2Q35Yl29DVwUNwx9thn3 rzErGRLmLZjcqNyZhb5FDFRp+j26IHDoPVus1ZHyaxYtIf1gOpoyPtMKAGgE49IverDF L9HZeRoX/Pf2MhxbHlmzTqXMmTAjxiSAe6316JSwIoUPndz7PWZJAagYK2Jg+IzqmV1K 9rbQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733576703; x=1734181503; 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=AxNFyJ4/tfiC1q5W7Izgw/pPJ2ikt4bgdXVlfofaQgJ8NpzS58ENvoXkXUt5zariaJ SGNhYF+cR50B0DPSZkK4fJH81xU8ZcktRyE25VTWPMkxb4hKXuUVLTR4dyS/CY4aWCs2 vOFAZiGzgMJfvtwexYaollEhQ6pA9YoBUZmtSt07KuNHaYCmAFwId+ATGW0XQixhJto3 bnE2k/7PFpmizmuOX/G3Rixg2zRwn4E4Laom0WgDHzFgjLv9hpbpRn1koUSlxgFlxH3W 9QR/Flkde3fs31TXecbKtH3XOsO8eEOfZZH3IuP37jW5u++o3iuTpG67/rRF9VDi9dgn fg/w== X-Forwarded-Encrypted: i=1; AJvYcCUcLplGEN3rdbpwj6ClK68ukkidGUHHRSQGJoAvqNjp2AVR46NNXPxu0dhlgc3EgYoYC4lHOimcf4CF@vger.kernel.org, AJvYcCWewyS7bAMaFg1iNTc089SudDHEyffIMM3oTPmMJAW48gFDe0QOGq2irBRNNIQ3rQEn34UY7wiFOe5AaQ==@vger.kernel.org, AJvYcCXG8ACxwv0cRqshHMHyZK0VELCIHAdSltnrzTFPvtDPRgOdXeEmryLmCRQZ5ob21PB4uPWg1FDP8JIGgj5O@vger.kernel.org, AJvYcCXGoK11NnC8QG1BkQwUoY9WGeMiv069GiAqd/bAEbOcHVmbdyll/C1X0lBRoh8kCeiZg+Sbdo43tocoBvE=@vger.kernel.org X-Gm-Message-State: AOJu0YxdN6MXGiNqmZ0ouJl9HNQMTHFOPpsFtPF6okAfomakyrNbb/7/ LopmS99bMIKwddPuujdh11mz8317Vyau3O39hTbEK15cG7mPUYv5 X-Gm-Gg: ASbGnctYFLTGZNYTBb9fLOZfcWU+sIcrluqkZEqn5provGQhZWXFjg44EXdMPcd6sr1 GwzmYUNJpYQbU7MA3e1LED/WJOnxYBAFMuh8a+rHeqUf3kwN6RndEHRyc0OvEhWfKVw5d2/Ygkn NUUEW91LctXCRrN6qMD+VT6cAew27gjzNFTS/tg14aE0DQTnP7DG+/Ay0vC34uGg860OE2deoFS jGUFve/l0zJAbZ2uBXwGMUMCDtZlWb0sld6hsMS3szLV3w3Y2szEJthj8H8A38gYg== X-Google-Smtp-Source: AGHT+IH0D/Yd8zXEABvPSshTZ5GdofWvmFimE7bz/L0Dg8+hzOe7KfKe6Ge/tMmMUKD8ETbyZzILpQ== X-Received: by 2002:a17:902:e80b:b0:215:97c5:52b0 with SMTP id d9443c01a7336-21614dac17dmr93533435ad.38.1733576703350; Sat, 07 Dec 2024 05:05:03 -0800 (PST) Received: from localhost.localdomain ([59.188.211.160]) by smtp.googlemail.com with ESMTPSA id d9443c01a7336-21628c59730sm12779715ad.105.2024.12.07.05.04.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 07 Dec 2024 05:05:03 -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 v2 3/3] MAINTAINERS: Add entries for Apple DWI backlight controller Date: Sat, 7 Dec 2024 21:03:16 +0800 Message-ID: <20241207130433.30351-4-towinchenmi@gmail.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241207130433.30351-1-towinchenmi@gmail.com> References: <20241207130433.30351-1-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