On Thu, Sep 08, 2016 at 02:47:20PM +0530, Raju Lakkaraju wrote:
> Patch 1/2:
>
> This is Edge rate control feature.
> 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.
>
> Microsemi PHY have the provision to configure the edge rate. Edge-rate
> function
> program the right value based on Device Tree configuration.
>
> Tested on Beaglebone Black with VSC 8531 PHY.
>
> Patch 2/2:
>
> This is MAC interface feature.
> Microsemi PHY can support RGMII, RMII or GMII/MII interface between MAC and
> PHY.
> MAC-IF function program the right value based on Device tree configuration.
Hi Raju
In future, please start a new thread for a new version of the
patchset.
Thanks
Andrew
