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[net-next,v6,1/2] dts: Add a binding for Synopsys emac max-frame-size

Message ID 1390217941-22967-2-git-send-email-vbridgers2013@gmail.com
State Accepted, archived
Commit 369ea818bc185815319f80248f780d42434b52bc
Headers show

Commit Message

Vince Bridgers Jan. 20, 2014, 11:39 a.m. UTC
This change adds a parameter for the Synopsys 10/100/1000
stmmac Ethernet driver to configure the maximum frame
size supported by the EMAC driver. Synopsys allows the FIFO
sizes to be configured when the cores are built for a particular
device, but do not provide a way for the driver to read
information from the device about the maximum MTU size
supported as limited by the device's FIFO size.

Signed-off-by: Vince Bridgers <vbridgers2013@gmail.com>
V6: respin for updated net-next
V5: simplify comment on use of max-frame-size
V4: add comments to explain use of max-frame-size with respect
    to inconsistent definition and use in the ePAPR v1.1 spec
V3: change snps,max-frame-size to max-frame-size
V2: change snps,max-mtu to snps,max-frame-size
 Documentation/devicetree/bindings/net/stmmac.txt |    3 +++
 1 file changed, 3 insertions(+)
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diff --git a/Documentation/devicetree/bindings/net/stmmac.txt b/Documentation/devicetree/bindings/net/stmmac.txt
index aefb639..9d92d42 100644
--- a/Documentation/devicetree/bindings/net/stmmac.txt
+++ b/Documentation/devicetree/bindings/net/stmmac.txt
@@ -32,6 +32,8 @@  Optional properties:
 - resets: Should contain a phandle to the STMMAC reset signal, if any
 - reset-names: Should contain the reset signal name "stmmaceth", if a
 	reset phandle is given
+- max-frame-size:	Maximum Transfer Unit (IEEE defined MTU), rather
+			than the maximum frame size.
@@ -42,5 +44,6 @@  Examples:
 		interrupts = <24 23>;
 		interrupt-names = "macirq", "eth_wake_irq";
 		mac-address = [000000000000]; /* Filled in by U-Boot */
+		max-frame-size = <3800>;
 		phy-mode = "gmii";