From patchwork Mon May 21 19:58:36 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: 10416277 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0A3206053B for ; Mon, 21 May 2018 19:58:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ED98C289FA for ; Mon, 21 May 2018 19:58:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E252428A02; Mon, 21 May 2018 19:58:54 +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=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 5A6F5289FA for ; Mon, 21 May 2018 19:58:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=mwmmse8buaNuqMYMlZqv4m5tB6BRlEMZ6MsSdO2MOuY=; b=aVf GCChVxP73SKjUqcgRhH3WSnMwB4+cSFAxJbCIiQDPNYk/S7tCrX5g0e1JnDgvltp8DqvM66kC9tMj SkuHPb87wYzYQairMx1eIonMvvhHmNIVN308y3/eZuaeS8tHy+jlsrFGDww2NO5GV6RE4O0N42HEx VLceBj2RqH9jjkdVz3S9esqfLni3WcbzUOiMOBZ0BmvrsKq1PJIqRlB/+ZKxZYzesOh89Wflc8ZWr 6xiVk+2cjKus2utPxould/Lc6JXaFr0yQRrMETolcea4RAB32MHHwPLBnDjgF4A3f7Pa70W8bz9bA qJwTgoFak6PZnLGHOVi6mhWpYzNMDZQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fKqxH-0000Fd-Pf; Mon, 21 May 2018 19:58:51 +0000 Received: from mga09.intel.com ([134.134.136.24]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fKqxE-0000Dm-Ov for linux-arm-kernel@lists.infradead.org; Mon, 21 May 2018 19:58:50 +0000 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 May 2018 12:58:37 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,427,1520924400"; d="scan'208";a="226073546" Received: from maru.jf.intel.com ([10.54.51.80]) by orsmga005.jf.intel.com with ESMTP; 21 May 2018 12:58:37 -0700 From: Jae Hyun Yoo To: Jason M Biils , Rob Herring , Mark Rutland , Joel Stanley , Andrew Jeffery , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: [v4 04/11] dt-bindings: Add a document of PECI adapter driver for ASPEED AST24xx/25xx SoCs Date: Mon, 21 May 2018 12:58:36 -0700 Message-Id: <20180521195836.27850-1-jae.hyun.yoo@linux.intel.com> X-Mailer: git-send-email 2.17.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180521_125848_862281_05A3CC3B X-CRM114-Status: GOOD ( 16.72 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Milton Miller II , Jae Hyun Yoo , Ryan Chen , Benjamin Herrenschmidt , Pavel Machek , Greg KH , Robin Murphy MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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 Cc: Benjamin Herrenschmidt Cc: Greg KH Cc: Jason M Biils Cc: Milton Miller II Cc: Pavel Machek Cc: Robin Murphy Cc: Ryan Chen --- .../devicetree/bindings/peci/peci-aspeed.txt | 57 +++++++++++++++++++ 1 file changed, 57 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..8c35f905589d --- /dev/null +++ b/Documentation/devicetree/bindings/peci/peci-aspeed.txt @@ -0,0 +1,57 @@ +Device tree configuration for PECI buses on the AST24XX and AST25XX SoCs. + +Required properties: +- compatible : Should be "aspeed,ast2400-peci" or "aspeed,ast2500-peci" + - aspeed,ast2400-peci: ASPEED AST2400 family PECI + controller + - aspeed,ast2500-peci: ASPEED AST2500 family PECI + controller +- 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>; + };