From mboxrd@z Thu Jan 1 00:00:00 1970 From: mugunthanvnm@ti.com (Mugunthan V N) Date: Wed, 20 Jul 2016 20:26:12 +0530 Subject: [net-next PATCH 1/3] net: phy: dp83867: Add documentation for optional impedance control In-Reply-To: <20160720145614.13132-1-mugunthanvnm@ti.com> References: <20160720145614.13132-1-mugunthanvnm@ti.com> Message-ID: <20160720145614.13132-2-mugunthanvnm@ti.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.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 | 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 -- 2.9.2.368.g08bb350