[PATCH 2/6] net: arc_emac: add phy-reset-* are optional for device tree
From: Caesar Wang <hidden>
Date: 2016-03-11 10:58:16
Also in:
linux-rockchip, lkml
Subsystem:
networking drivers, open firmware and flattened device tree bindings, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
This patch adds the following property for arc_emac. 1) phy-reset-gpios: The phy-reset-gpios 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. 3) phy-reset-active-high: We need that for a custom hardware that needs the reverse reset sequence. Anyway, we can add the above property for arc emac. Signed-off-by: Caesar Wang <redacted> --- Documentation/devicetree/bindings/net/arc_emac.txt | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/arc_emac.txt b/Documentation/devicetree/bindings/net/arc_emac.txt
index a1d71eb..6389b00 100644
--- a/Documentation/devicetree/bindings/net/arc_emac.txt
+++ b/Documentation/devicetree/bindings/net/arc_emac.txt@@ -7,6 +7,16 @@ 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. +- phy-reset-active-high : If present then the reset sequence using the GPIO + specified in the "phy-reset-gpios" property is reversed (H=reset state, + L=operation state). + Clock handling: The clock frequency is needed to calculate and set polling period of EMAC. It must be provided by one of:
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1.9.1
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