From patchwork Wed Feb 21 16:16:00 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: 10233445 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 5781D6056F for ; Wed, 21 Feb 2018 16:17:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 517E428721 for ; Wed, 21 Feb 2018 16:17:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 464C02877C; Wed, 21 Feb 2018 16:17:46 +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=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=ham 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 B06AB28770 for ; Wed, 21 Feb 2018 16:17:45 +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:References: In-Reply-To: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:List-Owner; bh=4QdWEX07chFtezL6eEfxBRNXTREVZGSq2xEOJQpTLBA=; b=UXNXWQSgb+GILoDf+NtCc1gmah k5cOhCng748zuisZGuaEUEpEJu697bI0+ixNglWOPezxEgUsQ0xsiDwVp8/L0nm/P8/1HuDq/Dc+S hOjxSEueE+IABrN+aYmFxxmW7FL/VAlJhISat+oJP9MsBWnGrrH82xPoEjyYyFlkbHMpwrL0Y29mk rKX0sTIg0ocajtV+vO5b/yXzvQHq4K8EE8Y+mgxKDmOQlVFqGF50HJQYkH0MdB73yFxMShCGj2ut8 Vaip6cqoSoLnJqQIcZDXCtFOCjFy8lq48kdRZIctHUkKthApQ332VNK/vx7Fxhcyt2JbxH8LZ11Hu LOQbn8ZQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1eoX5J-0007UR-NE; Wed, 21 Feb 2018 16:17:33 +0000 Received: from mga02.intel.com ([134.134.136.20]) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1eoX4D-0006so-M0 for linux-arm-kernel@lists.infradead.org; Wed, 21 Feb 2018 16:17:09 +0000 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Feb 2018 08:16:17 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,543,1511856000"; d="scan'208";a="29617842" Received: from maru.jf.intel.com ([10.54.51.80]) by orsmga003.jf.intel.com with ESMTP; 21 Feb 2018 08:16:17 -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, benh@kernel.crashing.org, andrew@lunn.ch Subject: [PATCH v2 2/8] [PATCH 2/8] Documentations: dt-bindings: Add a document of PECI adapter driver for Aspeed AST24xx/25xx SoCs Date: Wed, 21 Feb 2018 08:16:00 -0800 Message-Id: <20180221161606.32247-3-jae.hyun.yoo@linux.intel.com> X-Mailer: git-send-email 2.16.1 In-Reply-To: <20180221161606.32247-1-jae.hyun.yoo@linux.intel.com> References: <20180221161606.32247-1-jae.hyun.yoo@linux.intel.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180221_081626_320503_BB783845 X-CRM114-Status: GOOD ( 16.06 ) 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: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, Jae Hyun Yoo , linux-doc@vger.kernel.org, openbmc@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org 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 --- .../devicetree/bindings/peci/peci-aspeed.txt | 73 ++++++++++++++++++++++ 1 file changed, 73 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..8a86f346d550 --- /dev/null +++ b/Documentation/devicetree/bindings/peci/peci-aspeed.txt @@ -0,0 +1,73 @@ +Device tree configuration for PECI buses on the AST24XX and AST25XX SoCs. + +Required properties: +- compatible + "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 registers location and length. + +- #address-cells + Should be <1>. + +- #size-cells + Should be <0>. + +- interrupts + Should contain PECI interrupt. + +- clocks + Should contain clock source for PECI hardware module. Should reference + clkin clock. + +- clock_frequency + Should contain the operation frequency of PECI hardware module. + 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 = "simple-bus"; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0x0 0x1e78b000 0x60>; + + peci0: peci-bus@0 { + compatible = "aspeed,ast2500-peci"; + reg = <0x0 0x60>; + #address-cells = <1>; + #size-cells = <0>; + interrupts = <15>; + clocks = <&clk_clkin>; + clock-frequency = <24000000>; + msg-timing-nego = <1>; + addr-timing-nego = <1>; + rd-sampling-point = <8>; + cmd-timeout-ms = <1000>; + }; + }; \ No newline at end of file