From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AIpwx4//2vfCx4fljoW3s/gILwCRPUOMTpjXSCyM/CMtmZuOJ3rp2KHm8N/OU6CnwZJyAfZqasK4 ARC-Seal: i=1; a=rsa-sha256; t=1523385177; cv=none; d=google.com; s=arc-20160816; b=JXgKiFtV+pee6d1XkgmovEDK80eVpIvgttvTLjUPVq/EA5PElufph3EQ1wPJhLcFHB zJlsINPyjlPRSGAULetVQuFUtUlOBxQHiQbE6XWaVyULCQAf0feRbXlRdqDBbZqq47TW Eir7l1hKfVx7y/SmGaUQj/v2YDZSJ3EezlaP7t562LDqH1ccMRiZ6o6rVdoLlfXVYTnG mp6cJtQFVpp/1EwfzJQ7ATs9PO4vhweNsswVBGFJfB00ny/tnXMX5qMl0rSjtKAceVfd bX7j1fI2rk5VfS1CXWM1no4pUJHtr5KGalxsbRa0p9VmZ+83LqMOcKrYUL/NylMHtuz+ qC9g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:message-id:date:subject:cc:to:from :arc-authentication-results; bh=VM0b6/FbKsXsA9NEIzcEkRnUeF4o/EDxe9PEbAFQyQc=; b=jLCC4k1w2TvLnuh1IaTy4u+UN4ozAvhp2RmbotL7+luLweY0sM7GJAQXu0LZ5f+89T GH8wUdkxz9eth8tUxNHL4t+UlNImT504mS8x2AHU6fkVECSABkKSvv9gRgi4tw5Qop4m mQdAlWfn4TCV+EnC2jqUqVFvAoKUh56r1hjTJHjw0jOFb636rQ+/xUDonwCPOWeGq4Y5 vTJo17o+V7dl8t1VqwpOVxG68+Ol2FgujK4sx4N/y4yyd4Zlw2ZVVaP23lAlearKTUbU l/gMt8DgMohEWJj/bLq2mdXkxQAj+y0R/j5A4A7JZBb8QoVSzpEG8odnJjs8dt87oJLB C+pw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of jae.hyun.yoo@linux.intel.com designates 192.55.52.115 as permitted sender) smtp.mailfrom=jae.hyun.yoo@linux.intel.com Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of jae.hyun.yoo@linux.intel.com designates 192.55.52.115 as permitted sender) smtp.mailfrom=jae.hyun.yoo@linux.intel.com X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.48,433,1517904000"; d="scan'208";a="219323751" From: Jae Hyun Yoo To: Alan Cox , Andrew Jeffery , Andrew Lunn , Andy Shevchenko , Arnd Bergmann , Benjamin Herrenschmidt , Fengguang Wu , Greg KH , Guenter Roeck , Haiyue Wang , James Feist , Jason M Biils , Jean Delvare , Joel Stanley , Julia Cartwright , Miguel Ojeda , Milton Miller II , Pavel Machek , Randy Dunlap , Stef van Os , Sumeet R Pawnikar , Vernon Mauery 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 v3 04/10] Documentations: dt-bindings: Add a document of PECI adapter driver for Aspeed AST24xx/25xx SoCs Date: Tue, 10 Apr 2018 11:32:06 -0700 Message-Id: <20180410183212.16787-5-jae.hyun.yoo@linux.intel.com> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180410183212.16787-1-jae.hyun.yoo@linux.intel.com> References: <20180410183212.16787-1-jae.hyun.yoo@linux.intel.com> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1597385135853793781?= X-GMAIL-MSGID: =?utf-8?q?1597385135853793781?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 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: Alan Cox Cc: Andrew Jeffery Cc: Andrew Lunn Cc: Andy Shevchenko Cc: Arnd Bergmann Cc: Benjamin Herrenschmidt Cc: Fengguang Wu Cc: Greg KH Cc: Guenter Roeck Cc: Jason M Biils Cc: Jean Delvare Cc: Joel Stanley Cc: Julia Cartwright Cc: Miguel Ojeda Cc: Milton Miller II Cc: Pavel Machek Cc: Randy Dunlap Cc: Stef van Os Cc: Sumeet R Pawnikar --- .../devicetree/bindings/peci/peci-aspeed.txt | 60 ++++++++++++++++++++++ 1 file changed, 60 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..4598bb8c20fa --- /dev/null +++ b/Documentation/devicetree/bindings/peci/peci-aspeed.txt @@ -0,0 +1,60 @@ +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>. +- #size-cells : Should be <0>. +- interrupts : Should contain PECI controller interrupt. +- clocks : Should contain clock source for PECI controller. + Should reference clkin. +- clock_frequency : Should contain the operation frequency of PECI controller + in units of Hz. + 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 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: + 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>; + }; + }; -- 2.16.2