From patchwork Tue Jan 9 22:31:21 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: 10153573 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 C4AD3602CA for ; Tue, 9 Jan 2018 22:31:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AB111204C4 for ; Tue, 9 Jan 2018 22:31:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9C98026256; Tue, 9 Jan 2018 22:31:32 +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=-6.9 required=2.0 tests=BAYES_00,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 7B49C204C4 for ; Tue, 9 Jan 2018 22:31:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756813AbeAIWbb (ORCPT ); Tue, 9 Jan 2018 17:31:31 -0500 Received: from mga09.intel.com ([134.134.136.24]:36192 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753793AbeAIWb3 (ORCPT ); Tue, 9 Jan 2018 17:31:29 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 09 Jan 2018 14:31:28 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,337,1511856000"; d="scan'208";a="18805651" Received: from maru.jf.intel.com ([10.54.51.80]) by orsmga003.jf.intel.com with ESMTP; 09 Jan 2018 14:31:28 -0800 From: Jae Hyun Yoo To: joel@jms.id.au, andrew@aj.id.au, arnd@arndb.de, gregkh@linuxfoundation.org, jdelvare@suse.com, linux@roeck-us.net Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, devicetree@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-arm-kernel@lists.infradead.org, openbmc@lists.ozlabs.org, Jae Hyun Yoo Subject: [PATCH linux dev-4.10 1/6] Documentation: dt-bindings: Add Aspeed PECI Date: Tue, 9 Jan 2018 14:31:21 -0800 Message-Id: <20180109223126.13093-2-jae.hyun.yoo@linux.intel.com> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20180109223126.13093-1-jae.hyun.yoo@linux.intel.com> References: <20180109223126.13093-1-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 for Aspeed PECI. Signed-off-by: Jae Hyun Yoo --- .../devicetree/bindings/misc/aspeed-peci.txt | 55 ++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/misc/aspeed-peci.txt diff --git a/Documentation/devicetree/bindings/misc/aspeed-peci.txt b/Documentation/devicetree/bindings/misc/aspeed-peci.txt new file mode 100644 index 0000000..d277c73 --- /dev/null +++ b/Documentation/devicetree/bindings/misc/aspeed-peci.txt @@ -0,0 +1,55 @@ +* ASPEED PECI (Platform Environment Control Interface) misc driver. + +Hardware Interfaces: +- This driver implements support for the ASPEED AST2400/2500 PECI which has the + following features: + - Directly connected to APB bus + - Intel PECI 3.1 compliant (PECI 3.0 for AST2400) + - Maximum packet length is 256 bytes (Baseline transmission unit) + - Support up to 8 CPUs and 2 domains per CPU + - Integrate PECI compliant I/O buffers, can connect to PECI bus directly + - Transmit buffer 32 bytes and receive buffer 32 bytes + +Required properties: +- compatible: "aspeed,ast2400-peci" or "aspeed,ast2500-peci" + - aspeed,ast2400-peci: Aspeed AST2400 family PECI control interface + - aspeed,ast2500-peci: Aspeed AST2500 family PECI control interface +- reg: Should contain PECI registers location and length +- interrupts: Should contain PECI interrupt +- clocks: Should contain clock source. = <&clk_clkin>; +- clock_frequency: Should contain the operation frequency of PECI controller. + 187500 ~ 24000000 + +Optional properties: +- msg-timing-nego: 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-nego: 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 which time frame this 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: + peci: peci@1e78b000 { + compatible = "aspeed,ast2500-peci"; + reg = <0x1e78b000 0x60>; + interrupt-controller; + interrupts = <15>; + clocks = <&clk_clkin>; + clock-frequency = <24000000>; + msg-timing-nego = <1>; + addr-timing-nego = <1>; + rd-sampling-point = <8>; + cmd-timeout-ms = <1000>; + };