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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2EBABC433EF for ; Sun, 26 Sep 2021 09:59:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 17F1260F58 for ; Sun, 26 Sep 2021 09:59:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230141AbhIZKBU (ORCPT ); Sun, 26 Sep 2021 06:01:20 -0400 Received: from new2-smtp.messagingengine.com ([66.111.4.224]:40179 "EHLO new2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229755AbhIZKBR (ORCPT ); Sun, 26 Sep 2021 06:01:17 -0400 Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailnew.nyi.internal (Postfix) with ESMTP id 17140580FBB; Sun, 26 Sep 2021 05:59:41 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute5.internal (MEProxy); Sun, 26 Sep 2021 05:59:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=svenpeter.dev; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=fm2; bh=cWp5zIpWjNlKX lE1CaQrGZSrcDn1/ZujYfNah3kcVMs=; b=RiGy3SiNA6RI3cbllOyPHwKSVL1Bl vezDYajenNaEDI08pHR8v97sUkcOYK4TzaJzcCbIhTLTFHtW+tsRxguE1os8CFd3 FM2FvXyNnl25iMqW83XMseXo8guYPHyteRq98SK0KJUPUHPEP5U152RWrxEHzARh HdJZzH3c3XsDNXXv+lswLm7LD9/+mTn7X6TtA5so13z+wX6ECSOZA6QeVkyIjYh8 HHci8jNtr1TPQ6WBBn7dwJMcyLX/2+jFBK2lYK7qruoVWPxmZC0hE8MSX3iaK0Xk 8InE98JvrS2OMt3YWOX/wUKZUlGoBv4sMMe0Y82swXwMAOAEEe/hHhHSg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm3; bh=cWp5zIpWjNlKXlE1CaQrGZSrcDn1/ZujYfNah3kcVMs=; b=dOAooaKv d1UCQiYYrQE2ROmpc0o7NXYmtaKnjpHKuFJEpXv+AZz3NSXbUADepGkrrBeOn58m MXUBBe2Nsa94A2pQ8IwPHqxW9Y2tWZpULcRUzCwIVNtcLUR55jIh6WLi//QPiXcY C0/CMcyMMXzGx0Q1tyCnGOugE8WFNYsecROLNa1THvNTChC9fZAJ+z5tTLHXXW+h hkGnoWL1sjjEyv9LaOXRFhlYQf3k4zGnvxIxYRQKTofneon7T4TlH+1+3tNYkDuB RH2bmQHL93iZLv1ryG2HbNlHCA17Zsj3AGjfNIwTLx9iTI54WpIReEV1faDIflO7 6fa8f5ptKVX4nQ== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvtddrudejiedgvdduucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvufffkffojghfggfgsedtkeertdertddtnecuhfhrohhmpefuvhgvnhcu rfgvthgvrhcuoehsvhgvnhesshhvvghnphgvthgvrhdruggvvheqnecuggftrfgrthhtvg hrnhepiedvudfftedvieevieffvdejveeiveduhfeifeegheehhedtgfehffeuheefhfel necuffhomhgrihhnpeguvghvihgtvghtrhgvvgdrohhrghdpghhithhhuhgsrdgtohhmpd hofhhttgdrnhgvthenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhl fhhrohhmpehsvhgvnhesshhvvghnphgvthgvrhdruggvvh X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Sun, 26 Sep 2021 05:59:38 -0400 (EDT) From: Sven Peter To: Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Olof Johansson , Rob Herring Cc: Sven Peter , Arnd Bergmann , Hector Martin , Mohamed Mediouni , Stan Skowronek , Mark Kettenis , Alyssa Rosenzweig , linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH 01/10] dt-bindings: i2c: Add Apple I2C controller bindings Date: Sun, 26 Sep 2021 11:58:38 +0200 Message-Id: <20210926095847.38261-2-sven@svenpeter.dev> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20210926095847.38261-1-sven@svenpeter.dev> References: <20210926095847.38261-1-sven@svenpeter.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The Apple I2C controller is based on the PASemi I2C controller. It is present on Apple SoCs such as the M1. Signed-off-by: Sven Peter --- .../devicetree/bindings/i2c/apple,i2c.yaml | 61 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 62 insertions(+) create mode 100644 Documentation/devicetree/bindings/i2c/apple,i2c.yaml diff --git a/Documentation/devicetree/bindings/i2c/apple,i2c.yaml b/Documentation/devicetree/bindings/i2c/apple,i2c.yaml new file mode 100644 index 000000000000..22fc8483256f --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/apple,i2c.yaml @@ -0,0 +1,61 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/i2c/apple,i2c.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Apple/PASemi I2C controller + +maintainers: + - Sven Peter + +description: | + Apple SoCs such as the M1 come with a I2C controller based on the one found + in machines with P. A. Semi's PWRficient processors. + The bus is used to communicate with e.g. USB PD chips or the speaker + amp. + +allOf: + - $ref: /schemas/i2c/i2c-controller.yaml# + +properties: + compatible: + enum: + - apple,t8103-i2c + - apple,i2c + + reg: + maxItems: 1 + + clocks: + items: + - description: I2C bus reference clock + + interrupts: + maxItems: 1 + + clock-frequency: + description: | + Desired I2C bus clock frequency in Hz. If not specified, 100 kHz will be + used. This frequency is generated by dividing the reference clock. + Allowed values are between ref_clk/(16*4) and ref_clk/(16*255). + +required: + - compatible + - reg + - clocks + - interrupts + +unevaluatedProperties: false + +examples: + - | + i2c@35010000 { + compatible = "apple,t8103-i2c"; + reg = <0x35010000 0x4000>; + interrupt-parent = <&aic>; + interrupts = <0 627 4>; + clocks = <&ref_clk>; + #address-cells = <1>; + #size-cells = <0>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 329d3a0a9fdb..380a680db92f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1734,6 +1734,7 @@ B: https://github.com/AsahiLinux/linux/issues C: irc://irc.oftc.net/asahi-dev T: git https://github.com/AsahiLinux/linux.git F: Documentation/devicetree/bindings/arm/apple.yaml +F: Documentation/devicetree/bindings/i2c/apple,i2c.yaml F: Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml F: arch/arm64/boot/dts/apple/ -- 2.25.1