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STMicroelectronics SoC DWMAC glue layer controller
This file documents differences between the core properties in
Documentation/devicetree/bindings/net/stmmac.txt
and what is needed on STi platforms to program the stmmac glue logic.
The device node has following properties.
Required properties:
- compatible : Can be "st,stih415-dwmac", "st,stih416-dwmac",
"st,stih407-dwmac", "st,stid127-dwmac".
- reg : Offset of the glue configuration register map in system
configuration regmap pointed by st,syscon property and size.
- st,syscon : Should be phandle to system configuration node which
encompases this glue registers.
- st,gmac_en: this is to enable the gmac into a dedicated sysctl control
register available on STiH407 SoC.
- sti-ethconf: this is the gmac glue logic register to enable the GMAC,
select among the different modes and program the clk retiming.
- pinctrl-0: pin-control for all the MII mode supported.
Optional properties:
- resets : phandle pointing to the system reset controller with correct
reset line index for ethernet reset.
- st,ext-phyclk: valid only for RMII where PHY can generate 50MHz clock or
MAC can generate it.
- st,tx-retime-src: This specifies which clk is wired up to the mac for
retimeing tx lines. This is totally board dependent and can take one of the
posssible values from "txclk", "clk_125" or "clkgen".
If not passed, the internal clock will be used by default.
- sti-ethclk: this is the phy clock.
- sti-clkconf: this is an extra sysconfig register, available in new SoCs,
to program the clk retiming.
- st,gmac_en: to enable the GMAC, this only is present in some SoCs; e.g.
STiH407.
Example:
ethernet0: dwmac@9630000 {
device_type = "network";
status = "disabled";
compatible = "st,stih407-dwmac", "snps,dwmac", "snps,dwmac-3.710";
reg = <0x9630000 0x8000>, <0x80 0x4>;
reg-names = "stmmaceth", "sti-ethconf";
st,syscon = <&syscfg_sbc_reg>;
st,gmac_en;
resets = <&softreset STIH407_ETH1_SOFTRESET>;
reset-names = "stmmaceth";
interrupts = <GIC_SPI 98 IRQ_TYPE_NONE>,
<GIC_SPI 99 IRQ_TYPE_NONE>,
<GIC_SPI 100 IRQ_TYPE_NONE>;
interrupt-names = "macirq", "eth_wake_irq", "eth_lpi";
snps,pbl = <32>;
snps,mixed-burst;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_rgmii1>;
clock-names = "stmmaceth", "sti-ethclk";
clocks = <&CLK_S_C0_FLEXGEN CLK_EXT2F_A9>,
<&CLK_S_C0_FLEXGEN CLK_ETH_PHY>;
};
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