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authorCaesar Wang <wxt@rock-chips.com>2016-03-14 16:01:53 +0800
committerDavid S. Miller <davem@davemloft.net>2016-03-16 19:28:01 -0400
commit8700eee6271c932b2747a6b157655f546c27e7ad (patch)
tree2b0b383d3dd06eb692992bd865f6691ce0465c0d /Documentation
parent434242cd6080dde0103d3b4f28daec5c742c465e (diff)
net: arc_emac: add phy reset is optional for device tree
This patch adds the following property for arc_emac. 1) phy-reset-gpios: The phy-reset-gpio is an optional property for arc emac device tree boot. Change the binding document to match the driver code. 2) phy-reset-duration: Different boards may require different phy reset duration. Add property phy-reset-duration for device tree probe, so that the boards that need a longer reset duration can specify it in their device tree. Anyway, we can add the above property for arc emac. Signed-off-by: Caesar Wang <wxt@rock-chips.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: devicetree@vger.kernel.org Cc: netdev@vger.kernel.org Cc: "David S. Miller" <davem@davemloft.net> Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Cc; Alexander Kochetkov <al.kochet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/net/arc_emac.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/arc_emac.txt b/Documentation/devicetree/bindings/net/arc_emac.txt
index a1d71eb43b20..c73a0e9c625e 100644
--- a/Documentation/devicetree/bindings/net/arc_emac.txt
+++ b/Documentation/devicetree/bindings/net/arc_emac.txt
@@ -7,6 +7,13 @@ Required properties:
- max-speed: see ethernet.txt file in the same directory.
- phy: see ethernet.txt file in the same directory.
+Optional properties:
+- phy-reset-gpios : Should specify the gpio for phy reset
+- phy-reset-duration : Reset duration in milliseconds. Should present
+ only if property "phy-reset-gpios" is available. Missing the property
+ will have the duration be 1 millisecond. Numbers greater than 1000 are
+ invalid and 1 millisecond will be used instead.
+
Clock handling:
The clock frequency is needed to calculate and set polling period of EMAC.
It must be provided by one of: