linux-dev - Linux kernel development work

Age	Commit message (Collapse)	Author	Files	Lines
2016-10-14	net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs.	Allan W. Nielsen	1	-21/+0
	Edge-Rate cleanup include the following: - Updated device tree bindings documentation for edge-rate - The edge-rate is now specified as a "slowdown", meaning that it is now being specified as positive values instead of negative (both documentation and implementation wise). - Only explicitly documented values for "vsc8531,vddmac" and "vsc8531,edge-slowdown" are accepted by the device driver. - Deleted include/dt-bindings/net/mscc-phy-vsc8531.h as it was not needed. - Read/validate devicetree settings in probe instead of init Signed-off-by: Allan W. Nielsen <allan.nielsen@microsemi.com> Signed-off-by: Raju Lakkaraju <raju.lakkaraju@microsemi.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-04	net: phy: Add Edge-rate driver for Microsemi PHYs.	Raju Lakkaraju	1	-0/+21
	Edge-rate: As system and networking speeds increase, a signal's output transition, also know as the edge rate or slew rate (V/ns), takes on greater importance because high-speed signals come with a price. That price is an assortment of interference problems like ringing on the line, signal overshoot and undershoot, extended signal settling times, crosstalk noise, transmission line reflections, false signal detection by the receiving device and electromagnetic interference (EMI) -- all of which can negate the potential gains designers are seeking when they try to increase system speeds through the use of higher performance logic devices. The fact is, faster signaling edge rates can cause a higher level of electrical noise or other type of interference that can actually lead to slower line speeds and lower maximum system frequencies. This parameter allow the board designers to change the driving strange, and thereby change the EMI behavioral. Edge-rate parameters (vddmac, edge-slowdown) get from Device Tree. Tested on Beaglebone Black with VSC 8531 PHY. Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microsemi.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-06-03	net: phy: dp83867: Add TI dp83867 phy	Dan Murphy	1	-0/+45
	Add support for the TI dp83867 Gigabit ethernet phy device. The DP83867 is a robust, low power, fully featured Physical Layer transceiver with integrated PMD sublayers to support 10BASE-T, 100BASE-TX and 1000BASE-T Ethernet protocols. Signed-off-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>