From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mugunthan V N Subject: [PATCH v2 1/4] net: phy: dp83867: Add documentation for optional impedance control Date: Tue, 4 Oct 2016 18:26:04 +0530 Message-ID: <20161004125607.10569-2-mugunthanvnm@ti.com> References: <20161004125607.10569-1-mugunthanvnm@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Mark Rutland , devicetree@vger.kernel.org, Florian Fainelli , Mugunthan V N , Tony Lindgren , Sekhar Nori , linux-kernel@vger.kernel.org, Russell King , Rob Herring , linux-omap@vger.kernel.org, David Miller , linux-arm-kernel@lists.infradead.org To: Return-path: In-Reply-To: <20161004125607.10569-1-mugunthanvnm@ti.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org List-Id: netdev.vger.kernel.org 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 | 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 -- 2.10.0.372.g6fe1b14