From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946044AbcA1RMQ (ORCPT ); Thu, 28 Jan 2016 12:12:16 -0500 Received: from mail-by2on0074.outbound.protection.outlook.com ([207.46.100.74]:46976 "EHLO na01-by2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755094AbcA1RMJ (ORCPT ); Thu, 28 Jan 2016 12:12:09 -0500 Authentication-Results: spf=fail (sender IP is 66.35.236.227) smtp.mailfrom=opensource.altera.com; davemloft.net; dkim=pass (signature was verified) header.d=altera.onmicrosoft.com;davemloft.net; dmarc=none action=none header.from=opensource.altera.com; Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=dinguyen@opensource.altera.com; From: To: , , , , CC: , , , , , , Dinh Nguyen Subject: [PATCH] Doc: Micrel-ksz90x1.txt: Update the Micrel phy documentation for ksz9031 Date: Thu, 28 Jan 2016 10:49:27 -0600 Message-ID: <1453999767-26298-1-git-send-email-dinguyen@opensource.altera.com> X-Mailer: git-send-email 2.6.2 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [64.129.157.38] X-ClientProxiedBy: CY1PR20CA0086.namprd20.prod.outlook.com (25.164.213.140) To CY1PR03MB1375.namprd03.prod.outlook.com (25.163.16.29) X-MS-Office365-Filtering-Correlation-Id: be5c8980-06f9-4e4c-2aca-08d32803feb2 X-Microsoft-Exchange-Diagnostics-untrusted: 1;CY1PR03MB1375;2:TMr6XJo5iwKVvr+x6inseROX9on+VS+zrn1yGlOkzBN7fJQC2osDTUD/q3UJzGsU1ST151+N6c+GU4efdjgJkCAfA8zZiRrOfozpH+1pguyUEaXbvwL8HVgNhdTsBLSlyOE437an+03lBf/GCB0n/tPpVw7niJOzCmlkiTPIg7Ni21tisyGBrhEL6eftOBiR;3:OSZvpGOL5UA46Gc3PAyo1wZTmlEmk02zjKEFyhfsQpLHRMbvAkH8EXhZsXLKiT3ehAi5bI2iTbLw08Z2daa7uIfzi3PbarGcez0wUVrzGtGxYdrpFCJOA3vmHddYEPXN;25:L9DFonR3oDbjrhtcl3o+nencAhzcDyyaN7l4LUYEx36qTq44y41UPfyKF/YQYft4Aefq/M/z6P6rGiWS0cNTbxlr/sd8ismhTC5YrYKJZMW58ln60D5i5npu3XLlOweOzzjHLGwsrRc9Z7J/aklENco0z+EGyLiNonUJOrjltok+eJLJWv6wp5O3tvE7kAk8JKYIQB2Ve048WNssyQM1Yp8jQNnYJ3YkxEu31WNjfjVgixKHYvmuvwFikzwQNM9A;20:9rsa4NOGoVmwuBDfKbauqPae47S9Q8X6uG90mVlQBuEQWzO32YMYdDI8w5VWCCMjDX7SsyjMaTWoHbyERcOlpwVd+DOHo3BPrFOdWf2JduAZtiymXB5rdbZaN6rnLs3YFwZgX4Cj+kOoBPeOugMc5MhWuICl+C+9og8s8PzmeuA= X-Exchange-Antispam-Report-Test: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:CY1PR03MB1375;UriScan:(80048183373757);UriScan:;BCL:0;PCL:0;RULEID:(3001016);SRVR:DM2PR0301MB1213;UriScan:(80048183373757); 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Signed-off-by: Dinh Nguyen --- .../devicetree/bindings/net/micrel-ksz90x1.txt | 73 ++++++++++++++++++++++ 1 file changed, 73 insertions(+) diff --git a/Documentation/devicetree/bindings/net/micrel-ksz90x1.txt b/Documentation/devicetree/bindings/net/micrel-ksz90x1.txt index f9c32ad..9535b2b 100644 --- a/Documentation/devicetree/bindings/net/micrel-ksz90x1.txt +++ b/Documentation/devicetree/bindings/net/micrel-ksz90x1.txt @@ -36,6 +36,71 @@ KSZ9031: value is 0, and the maximum is property-dependent. The increment step is 60ps. + The KSZ9031 hardware supports a range of skew values from negative to + positive, where the specific range is property dependent. All values + specified in the devicetree are offset by the minimum value so they + can be represented as positive integers in the devicetree since it's + difficult to represent a negative number in the devictree. + + The following 5-bit values table apply to rxc-skew-ps and txc-skew-ps. + + Pad Skew Value Delay (ps) Devicetree Value + ------------------------------------------------------ + 0_0000 -900ps 0 + 0_0001 -840ps 60 + 0_0010 -780ps 120 + 0_0011 -720ps 180 + 0_0100 -660ps 240 + 0_0101 -600ps 300 + 0_0110 -540ps 360 + 0_0111 -480ps 420 + 0_1000 -420ps 480 + 0_1001 -360ps 540 + 0_1010 -300ps 600 + 0_1011 -240ps 660 + 0_1100 -180ps 720 + 0_1101 -120ps 780 + 0_1110 -60ps 840 + 0_1111 0ps 900 + 1_0000 60ps 960 + 1_0001 120ps 1020 + 1_0010 180ps 1080 + 1_0011 240ps 1140 + 1_0100 300ps 1200 + 1_0101 360ps 1260 + 1_0110 420ps 1320 + 1_0111 480ps 1380 + 1_1000 540ps 1440 + 1_1001 600ps 1500 + 1_1010 660ps 1560 + 1_1011 720ps 1620 + 1_1100 780ps 1680 + 1_1101 840ps 1740 + 1_1110 900ps 1800 + 1_1111 960ps 1860 + + The following 4-bit values table apply to the txdX-skew-ps, rxdX-skew-ps + data pads, and the rxdv-skew-ps, txen-skew-ps control pads. + + Pad Skew Value Delay (ps) Devicetree Value + ------------------------------------------------------ + 0000 -420ps 0 + 0001 -360ps 60 + 0010 -300ps 120 + 0011 -240ps 180 + 0100 -180ps 240 + 0101 -120ps 300 + 0110 -60ps 360 + 0111 0ps 420 + 1000 60ps 480 + 1001 120ps 540 + 1010 180ps 600 + 1011 240ps 660 + 1100 300ps 720 + 1101 360ps 780 + 1110 420ps 840 + 1111 480ps 900 + Optional properties: Maximum value of 1860: @@ -72,3 +137,11 @@ Examples: phy = <&phy0>; phy-mode = "rgmii-id"; }; + +References + + Micrel ksz9021rl/rn Data Sheet, Revision 1.2. Dated 2/13/2014. + http://www.micrel.com/_PDF/Ethernet/datasheets/ksz9021rl-rn_ds.pdf + + Micrel ksz9031rnx Data Sheet, Revision 2.1. Dated 11/20/2014. + http://www.micrel.com/_PDF/Ethernet/datasheets/KSZ9031RNX.pdf -- 2.6.2