From patchwork Wed Feb 1 10:33:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ryan Chen X-Patchwork-Id: 1735465 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=openbmc-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4P6JH70w6nz23gY for ; Wed, 1 Feb 2023 21:36:03 +1100 (AEDT) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4P6JH706Q4z3f3k for ; Wed, 1 Feb 2023 21:36:03 +1100 (AEDT) X-Original-To: openbmc@lists.ozlabs.org Delivered-To: openbmc@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=aspeedtech.com (client-ip=211.20.114.71; helo=twspam01.aspeedtech.com; envelope-from=ryan_chen@aspeedtech.com; receiver=) Received: from twspam01.aspeedtech.com (twspam01.aspeedtech.com [211.20.114.71]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4P6JG81nPYz3cMj; Wed, 1 Feb 2023 21:35:10 +1100 (AEDT) Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 311AMJ1C097435; Wed, 1 Feb 2023 18:22:20 +0800 (GMT-8) (envelope-from ryan_chen@aspeedtech.com) Received: from aspeedtech.com (192.168.10.13) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 1 Feb 2023 18:34:04 +0800 From: Ryan Chen To: Ryan Chen , Rob Herring , Krzysztof Kozlowski , Joel Stanley , Andrew Jeffery , Philipp Zabel , , , , Subject: [PATCH v4 2/3] dt-bindings: i2c-ast2600: Add support for AST2600 i2C driver Date: Wed, 1 Feb 2023 18:33:58 +0800 Message-ID: <20230201103359.1742140-3-ryan_chen@aspeedtech.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230201103359.1742140-1-ryan_chen@aspeedtech.com> References: <20230201103359.1742140-1-ryan_chen@aspeedtech.com> MIME-Version: 1.0 X-Originating-IP: [192.168.10.13] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 311AMJ1C097435 X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: openbmc-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "openbmc" AST2600 support new register set for I2C controller, add bindings document to support driver of i2c new register mode controller. Signed-off-by: Ryan Chen --- .../bindings/i2c/aspeed,i2c-ast2600.yaml | 78 +++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 Documentation/devicetree/bindings/i2c/aspeed,i2c-ast2600.yaml diff --git a/Documentation/devicetree/bindings/i2c/aspeed,i2c-ast2600.yaml b/Documentation/devicetree/bindings/i2c/aspeed,i2c-ast2600.yaml new file mode 100644 index 000000000000..b7d7bc303e77 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/aspeed,i2c-ast2600.yaml @@ -0,0 +1,78 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/i2c/aspeed,i2c-ast2600.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: AST2600 I2C Controller on the AST26XX SoCs Device Tree Bindings + +maintainers: + - Ryan Chen + +allOf: + - $ref: /schemas/i2c/i2c-controller.yaml# + +properties: + compatible: + enum: + - aspeed,ast2600-i2c + + reg: + minItems: 1 + items: + - description: address offset and range of bus + - description: address offset and range of bus buffer + + interrupts: + maxItems: 1 + + clocks: + maxItems: 1 + description: + root clock of bus, should reference the APB + clock in the second cell + + resets: + maxItems: 1 + + bus-frequency: + minimum: 500 + maximum: 2000000 + default: 100000 + description: frequency of the bus clock in Hz defaults to 100 kHz when not + specified + + multi-master: + type: boolean + description: + states that there is another master active on this bus + +required: + - reg + - compatible + - clocks + - resets + +unevaluatedProperties: false + +examples: + - | + #include + #include + + i2c_gr: i2c-global-regs@0 { + compatible = "aspeed,ast2600-i2c-global", "syscon"; + reg = <0x0 0x20>; + resets = <&syscon ASPEED_RESET_I2C>; + }; + + i2c0: i2c-bus@80 { + #address-cells = <1>; + #size-cells = <0>; + #interrupt-cells = <1>; + compatible = "aspeed,ast2600-i2c"; + reg = <0x80 0x80>, <0xC00 0x20>; + clocks = <&syscon ASPEED_CLK_APB2>; + resets = <&syscon ASPEED_RESET_I2C>; + bus-frequency = <100000>; + };