This patch adds documentation for a new "phy-handler" property
and "mdio" sub-node. These allows the enumeration of PHYs which
are supported by the phy library under drivers/net/phy.
The EMAC ethernet controller in IBM and AMCC 4xx chips is
currently stuck with a few privately defined phy
implementations. It has no support for PHYs which
are supported by the generic phylib.
Signed-off-by: Christian Lamparter <chunkeey@xxxxxxxxxxxxxx>
---
.../devicetree/bindings/powerpc/4xx/emac.txt | 60 +++++++++++++++++++++-
1 file changed, 58 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/powerpc/4xx/emac.txt b/Documentation/devicetree/bindings/powerpc/4xx/emac.txt
index 712baf6c3e24..0572d053c35a 100644
--- a/Documentation/devicetree/bindings/powerpc/4xx/emac.txt
+++ b/Documentation/devicetree/bindings/powerpc/4xx/emac.txt
@@ -71,6 +71,8 @@
For Axon it can be absent, though my current driver
doesn't handle phy-address yet so for now, keep
0x00ffffff in it.
+ - phy-handle : See net/ethernet.txt file; used to describe
+ configurations where a external PHY is used.
- rx-fifo-size-gige : 1 cell, Rx fifo size in bytes for 1000 Mb/sec
operations (if absent the value is the same as
rx-fifo-size). For Axon, either absent or 2048.
@@ -82,7 +84,18 @@
- tah-channel : 1 cell, optional. If appropriate, channel used on the
TAH engine.
- Example:
+ - mdio subnode : When the EMAC has a phy connected to its local
+ mdio, which us supported by the kernel's network
+ PHY library in drivers/net/phy, there must be device
+ tree subnode with the following required properties:
+ - #address-cells: Must be <1>.
+ - #size-cells: Must be <0>.
+
+ For each phy on the mdio bus, there must be a node
+ with the following fields:
+ - reg: phy id used to communicate to phy.
+ - device_type: Must be "ethernet-phy".
+ Examples:
EMAC0: ethernet@40000800 {
device_type = "network";
@@ -104,6 +117,50 @@
zmii-channel = <0>;
};
+ EMAC1: ethernet@ef600c00 {
+ device_type = "network";
+ compatible = "ibm,emac-apm821xx", "ibm,emac4sync";
+ interrupt-parent = <&EMAC1>;
+ interrupts = <0 1>;
+ #interrupt-cells = <1>;
+ #address-cells = <0>;
+ #size-cells = <0>;
+ interrupt-map = <0 &UIC2 0x10 IRQ_TYPE_LEVEL_HIGH /* Status */
+ 1 &UIC2 0x14 IRQ_TYPE_LEVEL_HIGH /* Wake */>;
+ reg = <0xef600c00 0x000000c4>;
+ local-mac-address = [000000000000]; /* Filled in by U-Boot */
+ mal-device = <&MAL0>;
+ mal-tx-channel = <0>;
+ mal-rx-channel = <0>;
+ cell-index = <0>;
+ max-frame-size = <9000>;
+ rx-fifo-size = <16384>;
+ tx-fifo-size = <2048>;
+ fifo-entry-size = <10>;
+ phy-mode = "rgmii";
+ phy-map = <0x00000000>;
+ phy-handle = <&phy0>;
+ rgmii-device = <&RGMII0>;
+ rgmii-channel = <0>;
+ tah-device = <&TAH0>;
+ tah-channel = <0>;
+ has-inverted-stacr-oc;
+ has-new-stacr-staopc;
+
+ mdio {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ phy0: ethernet-phy@0 {
+ device_type = "ethernet-phy";
+ reg = <0>;
+
+ qca,ar8327-initvals = <
+ 0x0010 0x40000000>;
+ };
+ };
+
+
ii) McMAL node
Required properties:
@@ -145,4 +202,3 @@
- revision : as provided by the RGMII new version register if
available.
For Axon: 0x0000012a
-
--
2.11.0
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