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linux-next/Documentation/devicetree/bindings/net/ftgmac100.txt
Andrew Jeffery 042b86753a dt-bindings: net: ftgmac100: Describe clock properties
Critically, the AST2600 requires ungating the RMII RCLK if e.g. NCSI is
in use.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Acked-by: Joel Stanley <joel@jms.id.au>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-10-11 20:37:38 -07:00

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* Faraday Technology FTGMAC100 gigabit ethernet controller
Required properties:
- compatible: "faraday,ftgmac100"
Must also contain one of these if used as part of an Aspeed AST2400
or 2500 family SoC as they have some subtle tweaks to the
implementation:
- "aspeed,ast2400-mac"
- "aspeed,ast2500-mac"
- "aspeed,ast2600-mac"
- reg: Address and length of the register set for the device
- interrupts: Should contain ethernet controller interrupt
Optional properties:
- phy-mode: See ethernet.txt file in the same directory. If the property is
absent, "rgmii" is assumed. Supported values are "rgmii*" and "rmii" for
aspeed parts. Other (unknown) parts will accept any value.
- use-ncsi: Use the NC-SI stack instead of an MDIO PHY. Currently assumes
rmii (100bT) but kept as a separate property in case NC-SI grows support
for a gigabit link.
- no-hw-checksum: Used to disable HW checksum support. Here for backward
compatibility as the driver now should have correct defaults based on
the SoC.
- clocks: In accordance with the generic clock bindings. Must describe the MAC
IP clock, and optionally an RMII RCLK gate for the AST2500/AST2600. The
required MAC clock must be the first cell.
- clock-names:
- "MACCLK": The MAC IP clock
- "RCLK": Clock gate for the RMII RCLK
Example:
mac0: ethernet@1e660000 {
compatible = "aspeed,ast2500-mac", "faraday,ftgmac100";
reg = <0x1e660000 0x180>;
interrupts = <2>;
use-ncsi;
};