[PATCH v2 2/9] net: arc_emac: add phy reset is optional for device tree

From: Caesar Wang
Date: Sun Mar 13 2016 - 05:08:40 EST

This patch adds the following property for arc_emac.

1) 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@xxxxxxxxxxxxxx>

Changes in v2: None

Documentation/devicetree/bindings/net/arc_emac.txt | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/arc_emac.txt b/Documentation/devicetree/bindings/net/arc_emac.txt
index a1d71eb..8e84b52 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:
+- reset-gpios : Should specify the gpio for phy reset
+- phy-reset-duration : Reset duration in milliseconds. Should present
+ only if property "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: