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net: dt-bindings: Document the new Meson8b and GXBB DWMAC bindings

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This patch adds the documentation for the DWMAC ethernet controller
found in Amlogic Meson 8b (S805) and GXBB (S905) SoCs.
The main difference between the Meson6 glue is that different registers
(with different layout) are used.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
This commit is contained in:
Martin Blumenstingl 2016-09-06 23:38:43 +02:00 committed by Kevin Hilman
parent ad855eae6c
commit 6aee159712
1 changed files with 37 additions and 8 deletions
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45
Documentation/devicetree/bindings/net/meson-dwmac.txt
View File

@ -1,18 +1,32 @@
* Amlogic Meson DWMAC Ethernet controller
The device inherits all the properties of the dwmac/stmmac devices
described in the file net/stmmac.txt with the following changes.
described in the file stmmac.txt in the current directory with the
following changes.
Required properties:
Required properties on all platforms:
- compatible: should be "amlogic,meson6-dwmac" along with "snps,dwmac"
and any applicable more detailed version number
described in net/stmmac.txt
- compatible: Depending on the platform this should be one of:
- "amlogic,meson6-dwmac"
- "amlogic,meson8b-dwmac"
- "amlogic,meson-gxbb-dwmac"
Additionally "snps,dwmac" and any applicable more
detailed version number described in net/stmmac.txt
should be used.
- reg: should contain a register range for the dwmac controller and
another one for the Amlogic specific configuration
- reg: The first register range should be the one of the DWMAC
controller. The second range is is for the Amlogic specific
configuration (for example the PRG_ETHERNET register range
on Meson8b and newer)
Example:
Required properties on Meson8b and newer:
- clock-names: Should contain the following:
- "stmmaceth" - see stmmac.txt
- "clkin0" - first parent clock of the internal mux
- "clkin1" - second parent clock of the internal mux
Example for Meson6:
ethmac: ethernet@c9410000 {
compatible = "amlogic,meson6-dwmac", "snps,dwmac";
@ -23,3 +37,18 @@ Example:
clocks = <&clk81>;
clock-names = "stmmaceth";
}
Example for GXBB:
ethmac: ethernet@c9410000 {
compatible = "amlogic,meson-gxbb-dwmac", "snps,dwmac";
reg = <0x0 0xc9410000 0x0 0x10000>,
<0x0 0xc8834540 0x0 0x8>;
interrupts = <0 8 1>;
interrupt-names = "macirq";
clocks = <&clkc CLKID_ETH>,
<&clkc CLKID_FCLK_DIV2>,
<&clkc CLKID_MPLL2>;
clock-names = "stmmaceth", "clkin0", "clkin1";
phy-mode = "rgmii";
status = "disabled";
};