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docs: networking: phy: Improve phrasing 

It's not about times (multiple occurences of an event) but about the
duration of a time interval.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Jonathan Neuschäfer 2019-10-03 22:43:22 +02:00 committed by Jonathan Corbet
parent d6ce98fe11
commit ea882f7576
1 changed files with 1 additions and 1 deletions
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Documentation/networking/phy.rst
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@ -73,7 +73,7 @@ The Reduced Gigabit Medium Independent Interface (RGMII) is a 12-pin
electrical signal interface using a synchronous 125Mhz clock signal and several
data lines. Due to this design decision, a 1.5ns to 2ns delay must be added
between the clock line (RXC or TXC) and the data lines to let the PHY (clock
sink) have enough setup and hold times to sample the data lines correctly. The
sink) have a large enough setup and hold time to sample the data lines correctly. The
PHY library offers different types of PHY_INTERFACE_MODE_RGMII* values to let
the PHY driver and optionally the MAC driver, implement the required delay. The
values of phy_interface_t must be understood from the perspective of the PHY