path: root/Documentation/devicetree/bindings/net
diff options
authorAndrew Bresticker <>2015-04-07 13:38:45 -0700
committerDavid S. Miller <>2015-04-08 14:58:15 -0400
commit5f9755d26fbfcb6787a6746653f1760fef0d5ba5 (patch)
tree0096a69a71bd906fea0cf390ddb1f21b03588d1a /Documentation/devicetree/bindings/net
parent2790460e145d198fe6925d405301a49b2d8cb03f (diff)
stmmac: Add an optional register interface clock
The DWMAC block on certain SoCs (such as IMG Pistachio) have a second clock which must be enabled in order to access the peripheral's register interface, so add support for requesting and enabling an optional "pclk". Signed-off-by: Andrew Bresticker <> Cc: James Hartley <> Cc: Arnd Bergmann <> Signed-off-by: David S. Miller <>
Diffstat (limited to 'Documentation/devicetree/bindings/net')
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/net/stmmac.txt b/Documentation/devicetree/bindings/net/stmmac.txt
index 8ca65cec52ae..29aca8591b16 100644
--- a/Documentation/devicetree/bindings/net/stmmac.txt
+++ b/Documentation/devicetree/bindings/net/stmmac.txt
@@ -35,10 +35,11 @@ Optional properties:
- reset-names: Should contain the reset signal name "stmmaceth", if a
reset phandle is given
- max-frame-size: See ethernet.txt file in the same directory
-- clocks: If present, the first clock should be the GMAC main clock,
- further clocks may be specified in derived bindings.
+- clocks: If present, the first clock should be the GMAC main clock and
+ the second clock should be peripheral's register interface clock. Further
+ clocks may be specified in derived bindings.
- clock-names: One name for each entry in the clocks property, the
- first one should be "stmmaceth".
+ first one should be "stmmaceth" and the second one should be "pclk".
- clk_ptp_ref: this is the PTP reference clock; in case of the PTP is
available this clock is used for programming the Timestamp Addend Register.
If not passed then the system clock will be used and this is fine on some