From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x227ZpZ33VSTdKs43Xw3aTwZLnrxSRu3wQhdFB/vMRVMC6bXe9ewzmymjIiAlLr/OVmwCDQOn ARC-Seal: i=1; a=rsa-sha256; t=1519229777; cv=none; d=google.com; s=arc-20160816; b=gaq2Icqho5Bk0gDLtWExdGryZXAjI9hdQQJfY5FQpqdNuOm5laK1Mk4D9XT+LUqU/m 5wNmd799X9h8dXdzOcXcTUL/EXuWm8W8TnwTSUy9a9g8tXGyy0XOWZjyJS2YXPNRTzS7 4L5XmLzCCpLJ3MKvEti/iFBvO8HG4T7xmZcs4V5/ahKlSCSya+t93jSYJn72zDGND1Ul noi5SZn8J0gBhEeQId9lIw5Mqt9weWjVFN9bexnVuvaTH/H2qFZVR1W4bNeclK2q22Wl /DaNLhLrwOASCeKzBWz6qeElPYJdoWZ5ycXkOKHQo1PaW2ozJnXa8LmetNjdXm+EIA2I WpRg== 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=yM4xAM47Dzrk9o8lf+w1P0injSJiW/h8o38I6A13apo=; b=xiaiTlvPPQ6zTniEqL5K9FnnrV6umGnmCl3ORYsCgtFFX2fsMG9uXBs5UfGumdiqo5 Q23DehJz7JrX1obzJLsMgK0WcZ7fMJTGZsgBRQs5A92gsIICoQFtTH9EPr731wLLj4I3 BiYInvSlOOKse3MF6X/uxreFZKqYSiL6Esa4Ofb8lRsZXqN3SkDKaWn/CLCAUdPKS8mG SbHWyNkYqVzwY4XzODDrnUdzQEPhsHU+EA91TNGOhPy2v1xNOEPSKTTelPBwWp/lltZH h5aQcCXZWwzbFpc7sZDzu92AWYoKSOaUmzcUmxsDjw1UKBhBrx8ke9+pEIzmTTVSNBKT eIWw== 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 192.55.52.43 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 192.55.52.43 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="5.46,543,1511856000"; d="scan'208";a="29617842" 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 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 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-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1593027883264098537?= X-GMAIL-MSGID: =?utf-8?q?1593027883264098537?= 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 --- .../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 -- 2.16.1