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2938090556
The i.MX6 Q/DL has an erratum (ERR006687) that prevents the FEC from waking the CPUs when they are in wait(unclocked) state. As the hardware workaround isn't applicable to all boards, disable the deeper idle state when the workaround isn't present and the FEC is in use. This allows to safely run a kernel with CPUidle enabled on all i.MX6 boards. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Acked-by: David S. Miller <davem@davemloft.net> (for network changes) Signed-off-by: Shawn Guo <shawnguo@kernel.org>
69 lines
2.4 KiB
Plaintext
69 lines
2.4 KiB
Plaintext
* Freescale Fast Ethernet Controller (FEC)
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Required properties:
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- compatible : Should be "fsl,<soc>-fec"
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- reg : Address and length of the register set for the device
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- interrupts : Should contain fec interrupt
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- phy-mode : See ethernet.txt file in the same directory
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Optional properties:
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- phy-reset-gpios : Should specify the gpio for phy reset
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- phy-reset-duration : Reset duration in milliseconds. Should present
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only if property "phy-reset-gpios" is available. Missing the property
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will have the duration be 1 millisecond. Numbers greater than 1000 are
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invalid and 1 millisecond will be used instead.
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- phy-reset-active-high : If present then the reset sequence using the GPIO
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specified in the "phy-reset-gpios" property is reversed (H=reset state,
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L=operation state).
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- phy-supply : regulator that powers the Ethernet PHY.
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- phy-handle : phandle to the PHY device connected to this device.
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- fixed-link : Assume a fixed link. See fixed-link.txt in the same directory.
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Use instead of phy-handle.
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- fsl,num-tx-queues : The property is valid for enet-avb IP, which supports
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hw multi queues. Should specify the tx queue number, otherwise set tx queue
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number to 1.
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- fsl,num-rx-queues : The property is valid for enet-avb IP, which supports
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hw multi queues. Should specify the rx queue number, otherwise set rx queue
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number to 1.
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- fsl,magic-packet : If present, indicates that the hardware supports waking
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up via magic packet.
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- fsl,err006687-workaround-present: If present indicates that the system has
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the hardware workaround for ERR006687 applied and does not need a software
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workaround.
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Optional subnodes:
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- mdio : specifies the mdio bus in the FEC, used as a container for phy nodes
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according to phy.txt in the same directory
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Example:
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ethernet@83fec000 {
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compatible = "fsl,imx51-fec", "fsl,imx27-fec";
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reg = <0x83fec000 0x4000>;
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interrupts = <87>;
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phy-mode = "mii";
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phy-reset-gpios = <&gpio2 14 0>; /* GPIO2_14 */
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local-mac-address = [00 04 9F 01 1B B9];
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phy-supply = <®_fec_supply>;
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};
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Example with phy specified:
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ethernet@83fec000 {
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compatible = "fsl,imx51-fec", "fsl,imx27-fec";
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reg = <0x83fec000 0x4000>;
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interrupts = <87>;
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phy-mode = "mii";
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phy-reset-gpios = <&gpio2 14 0>; /* GPIO2_14 */
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local-mac-address = [00 04 9F 01 1B B9];
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phy-supply = <®_fec_supply>;
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phy-handle = <ðphy>;
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mdio {
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ethphy: ethernet-phy@6 {
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compatible = "ethernet-phy-ieee802.3-c22";
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reg = <6>;
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max-speed = <100>;
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};
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};
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};
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