From patchwork Mon Jul 23 21:47:43 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jae Hyun Yoo X-Patchwork-Id: 10541147 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F25C691E for ; Mon, 23 Jul 2018 21:48:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E09BD2848D for ; Mon, 23 Jul 2018 21:48:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D342D284F9; Mon, 23 Jul 2018 21:48:47 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 57AF22848D for ; Mon, 23 Jul 2018 21:48:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388301AbeGWWv4 (ORCPT ); Mon, 23 Jul 2018 18:51:56 -0400 Received: from mga09.intel.com ([134.134.136.24]:8908 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388187AbeGWWvz (ORCPT ); Mon, 23 Jul 2018 18:51:55 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 23 Jul 2018 14:48:44 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,394,1526367600"; d="scan'208";a="66923116" Received: from maru.jf.intel.com ([10.54.51.80]) by FMSMGA003.fm.intel.com with ESMTP; 23 Jul 2018 14:48:43 -0700 From: Jae Hyun Yoo To: Jean Delvare , Guenter Roeck , Rob Herring , Mark Rutland , Lee Jones , Joel Stanley , Andrew Jeffery , Jonathan Corbet , Greg Kroah-Hartman , Gustavo Pimentel , Kishon Vijay Abraham I , Lorenzo Pieralisi , "Darrick J . Wong" , Eric Sandeen , Arnd Bergmann , Wu Hao , Tomohiro Kusumi , "Bryant G . Ly" , Frederic Barrat , "David S . Miller" , Mauro Carvalho Chehab , Andrew Morton , Randy Dunlap , Philippe Ombredanne , Vinod Koul , Stephen Boyd , David Kershner , Uwe Kleine-Konig , Sagar Dharia , Johan Hovold , Thomas Gleixner , Juergen Gross , Cyrille Pitchen Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, linux-doc@vger.kernel.org, openbmc@lists.ozlabs.org, Jae Hyun Yoo , Benjamin Herrenschmidt , Jason M Biils , Milton Miller II , Pavel Machek , Robin Murphy , Ryan Chen Subject: [PATCH v7 04/12] dt-bindings: Add a document of PECI adapter driver for ASPEED AST24xx/25xx SoCs Date: Mon, 23 Jul 2018 14:47:43 -0700 Message-Id: <20180723214751.1733-5-jae.hyun.yoo@linux.intel.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180723214751.1733-1-jae.hyun.yoo@linux.intel.com> References: <20180723214751.1733-1-jae.hyun.yoo@linux.intel.com> Sender: linux-hwmon-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This commit adds a dt-bindings document of PECI adapter driver for ASPEED AST24xx/25xx SoCs. Signed-off-by: Jae Hyun Yoo Reviewed-by: Haiyue Wang Reviewed-by: James Feist Reviewed-by: Vernon Mauery Reviewed-by: Rob Herring Cc: Mark Rutland Cc: Joel Stanley Cc: Andrew Jeffery Cc: Benjamin Herrenschmidt Cc: Greg Kroah-Hartman Cc: Jason M Biils Cc: Milton Miller II Cc: Pavel Machek Cc: Robin Murphy Cc: Ryan Chen --- .../devicetree/bindings/peci/peci-aspeed.txt | 55 +++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/peci/peci-aspeed.txt diff --git a/Documentation/devicetree/bindings/peci/peci-aspeed.txt b/Documentation/devicetree/bindings/peci/peci-aspeed.txt new file mode 100644 index 000000000000..cdca73a3b7d8 --- /dev/null +++ b/Documentation/devicetree/bindings/peci/peci-aspeed.txt @@ -0,0 +1,55 @@ +Device tree configuration for PECI buses on the AST24XX and AST25XX SoCs. + +Required properties: +- compatible : Should be one of: + "aspeed,ast2400-peci" + "aspeed,ast2500-peci" +- reg : Should contain PECI controller registers location and + length. +- #address-cells : Should be <1> required to define a client address. +- #size-cells : Should be <0> required to define a client address. +- interrupts : Should contain PECI controller interrupt. +- clocks : Should contain clock source for PECI controller. Should + reference the external oscillator clock in the second + cell. +- resets : Should contain phandle to reset controller with the reset + number in the second cell. +- clock-frequency : Should contain the operation frequency of PECI controller + in units of Hz. + 187500 ~ 24000000 + +Optional properties: +- msg-timing : Message timing negotiation period. This value will + determine the period of message timing negotiation to be + issued by PECI controller. The unit of the programmed + value is four times of PECI clock period. + 0 ~ 255 (default: 1) +- addr-timing : Address timing negotiation period. This value will + determine the period of address timing negotiation to be + issued by PECI controller. The unit of the programmed + value is four times of PECI clock period. + 0 ~ 255 (default: 1) +- rd-sampling-point : Read sampling point selection. The whole period of a bit + time will be divided into 16 time frames. This value will + determine the time frame in which the controller will + sample PECI signal for data read back. Usually in the + middle of a bit time is the best. + 0 ~ 15 (default: 8) +- cmd-timeout-ms : Command timeout in units of ms. + 1 ~ 60000 (default: 1000) + +Example: + peci0: peci-bus@0 { + compatible = "aspeed,ast2500-peci"; + reg = <0x0 0x60>; + #address-cells = <1>; + #size-cells = <0>; + interrupts = <15>; + clocks = <&syscon ASPEED_CLK_GATE_REFCLK>; + resets = <&syscon ASPEED_RESET_PECI>; + clock-frequency = <24000000>; + msg-timing = <1>; + addr-timing = <1>; + rd-sampling-point = <8>; + cmd-timeout-ms = <1000>; + };