Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760102AbcJRLV1 (ORCPT ); Tue, 18 Oct 2016 07:21:27 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:41287 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754207AbcJRLVU (ORCPT ); Tue, 18 Oct 2016 07:21:20 -0400 From: Mugunthan V N To: CC: , , , , Rob Herring , Mark Rutland , Tony Lindgren , Russell King , Florian Fainelli , David Miller , Sekhar Nori , Mugunthan V N Subject: [PATCH v4 1/4] net: phy: dp83867: Add documentation for optional impedance control Date: Tue, 18 Oct 2016 16:50:17 +0530 Message-ID: <20161018112020.30273-2-mugunthanvnm@ti.com> X-Mailer: git-send-email 2.10.1.445.g3cdd5d1 In-Reply-To: <20161018112020.30273-1-mugunthanvnm@ti.com> References: <20161018112020.30273-1-mugunthanvnm@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1368 Lines: 34 Add documention of ti,min-output-impedance and ti,max-output-impedance 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 | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/devicetree/bindings/net/ti,dp83867.txt b/Documentation/devicetree/bindings/net/ti,dp83867.txt index 5d21141..85bf945 100644 --- a/Documentation/devicetree/bindings/net/ti,dp83867.txt +++ b/Documentation/devicetree/bindings/net/ti,dp83867.txt @@ -9,6 +9,18 @@ Required properties: - ti,fifo-depth - Transmitt FIFO depth- see dt-bindings/net/ti-dp83867.h for applicable values +Optional property: + - ti,min-output-impedance - MAC Interface Impedance control to set + the programmable output impedance to + minimum value (35 ohms). + - ti,max-output-impedance - MAC Interface Impedance control to set + the programmable output impedance to + maximum value (70 ohms). + +Note: ti,min-output-impedance and ti,max-output-impedance are mutually + exclusive. When both properties are present ti,max-output-impedance + takes precedence. + Default child nodes are standard Ethernet PHY device nodes as described in Documentation/devicetree/bindings/net/phy.txt -- 2.10.1.445.g3cdd5d1