From patchwork Mon Aug 16 10:48:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Billy Tsai X-Patchwork-Id: 12438157 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0DCD5C4338F for ; Mon, 16 Aug 2021 10:52:38 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CD14561BE1 for ; Mon, 16 Aug 2021 10:52:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org CD14561BE1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=aspeedtech.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=uuZPBwhoNyafA2jBUwiEWoVHngr75Td8Rg8N/Q4ODJo=; b=L674Eo7SY6P4GN 4O86fjY9bwja+Ype2DP5eWZR9Ak9RW4XuFv1AM632MYdmd2bxCNHPyMnXIgWqmx3bbiaC3cGA/zG/ dLfGvnNHX6srBCNRXiEVO0WAK7jJZjdY7RudY5uE7NhjS6awxyI6Fdp16/p9Sb0fgeHfa1pmIG3Xb vC0CYt5ezO6R0JrZg1GARyr7H3IpcHEAzTrzw+gVwFsQEx2xpdxJP+selNIXPqlLp8qT2G4rgubNL tBie7FJLy5u3WVpDbjRHcF6khAYDlKu7aSZa3iinHONPlC5bRDqf2XUyzmMj1U519l3g0jRtH2u4b 7YgYhejFM1MuH86e0LTg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mFaBO-00Giwu-Qp; Mon, 16 Aug 2021 10:49:31 +0000 Received: from [211.20.114.71] (helo=twspam01.aspeedtech.com) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mFaAk-00GilA-Dq for linux-arm-kernel@lists.infradead.org; Mon, 16 Aug 2021 10:48:54 +0000 Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 17GAUMO5044039; Mon, 16 Aug 2021 18:30:22 +0800 (GMT-8) (envelope-from billy_tsai@aspeedtech.com) Received: from BillyTsai-pc.aspeed.com (192.168.2.149) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 16 Aug 2021 18:48:27 +0800 From: Billy Tsai To: , , , , , , , , , , , , , CC: Subject: [v3 01/15] dt-bindings: iio: adc: Add ast2600-adc bindings Date: Mon, 16 Aug 2021 18:48:32 +0800 Message-ID: <20210816104846.13155-2-billy_tsai@aspeedtech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210816104846.13155-1-billy_tsai@aspeedtech.com> References: <20210816104846.13155-1-billy_tsai@aspeedtech.com> MIME-Version: 1.0 X-Originating-IP: [192.168.2.149] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 17GAUMO5044039 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210816_034850_772034_A0EDB93D X-CRM114-Status: GOOD ( 13.20 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add device tree bindings document for the aspeed ast2600 adc device driver. Signed-off-by: Billy Tsai --- .../bindings/iio/adc/aspeed,ast2600-adc.yaml | 98 +++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/aspeed,ast2600-adc.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/aspeed,ast2600-adc.yaml b/Documentation/devicetree/bindings/iio/adc/aspeed,ast2600-adc.yaml new file mode 100644 index 000000000000..28bff89e0d75 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/aspeed,ast2600-adc.yaml @@ -0,0 +1,98 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/aspeed,ast2600-adc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ADC that forms part of an ASPEED server management processor. + +maintainers: + - Billy Tsai + +description: | + • 10-bits resolution for 16 voltage channels. + • The device split into two individual engine and each contains 8 voltage + channels. + • Channel scanning can be non-continuous. + • Programmable ADC clock frequency. + • Programmable upper and lower threshold for each channels. + • Interrupt when larger or less than threshold for each channels. + • Support hysteresis for each channels. + • Built-in a compensating method. + • Built-in a register to trim internal reference voltage. + • Internal or External reference voltage. + • Support 2 Internal reference voltage 1.2v or 2.5v. + • Integrate dividing circuit for battery sensing. + +properties: + compatible: + enum: + - aspeed,ast2600-adc0 + - aspeed,ast2600-adc1 + + reg: + maxItems: 1 + + clocks: + description: + Input clock used to derive the sample clock. Expected to be the + SoC's APB clock. + + resets: + maxItems: 1 + + "#io-channel-cells": + const: 1 + + vref-supply: + description: + The external regulator supply ADC reference voltage. + + aspeed,int_vref_mv: + enum: + - 1200 + - 2500 + description: + ADC internal reference voltage in millivolts. + + aspeed,battery-sensing: + type: boolean + description: + Inform the driver that last channel will be used to sensor battery. + + aspeed,trim-data-valid: + type: boolean + description: | + The ADC reference voltage can be calibrated to obtain the trimming + data which will be stored in otp. This property informs the driver that + the data store in the otp is valid. + +required: + - compatible + - reg + - clocks + - resets + - "#io-channel-cells" + +additionalProperties: false + +examples: + - | + #include + adc0: adc@1e6e9000 { + compatible = "aspeed,ast2600-adc0"; + reg = <0x1e6e9000 0x100>; + clocks = <&syscon ASPEED_CLK_APB2>; + resets = <&syscon ASPEED_RESET_ADC>; + #io-channel-cells = <1>; + aspeed,int_vref_mv = <2500>; + }; + adc1: adc@1e6e9100 { + compatible = "aspeed,ast2600-adc1"; + reg = <0x1e6e9100 0x100>; + clocks = <&syscon ASPEED_CLK_APB2>; + resets = <&syscon ASPEED_RESET_ADC>; + #io-channel-cells = <1>; + aspeed,int_vref_mv = <2500>; + }; +...