From patchwork Wed Jul 20 14:56:12 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mugunthan V N X-Patchwork-Id: 9239737 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 3EE20602F0 for ; Wed, 20 Jul 2016 14:59:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 303BF2026B for ; Wed, 20 Jul 2016 14:59:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 24FC827BFC; Wed, 20 Jul 2016 14:59:02 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D2CE32026B for ; Wed, 20 Jul 2016 14:59:01 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bPswF-0006Cu-Am; Wed, 20 Jul 2016 14:57:31 +0000 Received: from comal.ext.ti.com ([198.47.26.152]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bPsvy-00068K-Ff for linux-arm-kernel@lists.infradead.org; Wed, 20 Jul 2016 14:57:17 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id u6KErrLq030008; Wed, 20 Jul 2016 09:53:53 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id u6KEuYtV008474; Wed, 20 Jul 2016 09:56:35 -0500 Received: from dflp33.itg.ti.com (10.64.6.16) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.3.294.0; Wed, 20 Jul 2016 09:56:34 -0500 Received: from a0131834lt.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp33.itg.ti.com (8.14.3/8.13.8) with ESMTP id u6KEuPHH029379; Wed, 20 Jul 2016 09:56:30 -0500 From: Mugunthan V N To: Subject: [net-next PATCH 1/3] net: phy: dp83867: Add documentation for optional impedance control Date: Wed, 20 Jul 2016 20:26:12 +0530 Message-ID: <20160720145614.13132-2-mugunthanvnm@ti.com> X-Mailer: git-send-email 2.9.2.368.g08bb350 In-Reply-To: <20160720145614.13132-1-mugunthanvnm@ti.com> References: <20160720145614.13132-1-mugunthanvnm@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160720_075714_699659_24D4AE91 X-CRM114-Status: UNSURE ( 7.00 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Florian Fainelli , Mugunthan V N , Tony Lindgren , Sekhar Nori , Russell King , linux-kernel@vger.kernel.org, Rob Herring , linux-omap@vger.kernel.org, "David S . Miller" , linux-arm-kernel@lists.infradead.org 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 Add documention of ti,impedance-control which can be used to correct MAC impedance mismatch using phy extended registers. Signed-off-by: Mugunthan V N --- Documentation/devicetree/bindings/net/ti,dp83867.txt | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/net/ti,dp83867.txt b/Documentation/devicetree/bindings/net/ti,dp83867.txt index 5d21141..531ea3c5 100644 --- a/Documentation/devicetree/bindings/net/ti,dp83867.txt +++ b/Documentation/devicetree/bindings/net/ti,dp83867.txt @@ -9,6 +9,13 @@ Required properties: - ti,fifo-depth - Transmitt FIFO depth- see dt-bindings/net/ti-dp83867.h for applicable values +Optional property: + - ti,impedance-control - MAC Interface Impedance control to vary the + output impedance with an approximate range + from 35-70 ohms in 32 steps. Value range can + be 0x0 to 0x1f. Lowest impedance value is + 0x1f and highest impedance being 0x0. + Default child nodes are standard Ethernet PHY device nodes as described in Documentation/devicetree/bindings/net/phy.txt