The document descripts how to add properties for GMAC in device tree.
Signed-off-by: Roger Chen <[email protected]>
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.../devicetree/bindings/net/rockchip-dwmac.txt | 71 ++++++++++++++++++++
1 file changed, 71 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/rockchip-dwmac.txt
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b/Documentation/devicetree/bindings/net/rockchip-dwmac.txt
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+Rockchip SoC RK3288 10/100/1000 Ethernet driver(GMAC)
+
+The device node has following properties.
+
+Required properties:
+ - compatible: Can be "rockchip,rk3288-gmac".
+ - reg: addresses and length of the register sets for the device.
+ - interrupts: Should contain the GMAC interrupts.
+ - interrupt-names: Should contain the interrupt names "macirq".
+ - rockchip,grf: phandle to the syscon grf used to control speed and mode.
+ - clocks: <&cru SCLK_MAC>: clock selector for main clock, from PLL or PHY.
+ <&cru SCLK_MAC_PLL>: PLL clock for SCLK_MAC
+ <&cru SCLK_MAC_RX>: clock gate for RX
+ <&cru SCLK_MAC_TX>: clock gate for TX
+ <&cru SCLK_MACREF>: clock gate for RMII referce clock
+ <&cru SCLK_MACREF_OUT> clock gate for RMII reference clock output
+ <&cru ACLK_GMAC>: AXI clock gate for GMAC
+ <&cru PCLK_GMAC>: APB clock gate for GMAC
+ - clock-names: One name for each entry in the clocks property.
+ - phy-mode: See ethernet.txt file in the same directory.
+ - pinctrl-names: Names corresponding to the numbered pinctrl states.
+ - pinctrl-0: pin-control mode. can be <&rgmii_pins> or <&rmii_pins>.
+ - clock_in_out: For RGMII, it must be "input", means main clock(125MHz)
+ is not sourced from SoC's PLL, but input from PHY; For RMII, "input" means
+ PHY provides the reference clock(50MHz), "output" means GMAC provides the
+ reference clock.
+ - assigned-clocks: main clock, should be <&cru SCLK_MAC>;
+ - assigned-clock-parents = parent of main clock.
+ can be <&ext_gmac> or <&cru SCLK_MAC_PLL>.
+ - reset-gpio: GPIO for reset
+
+Optional properties:
+ - tx_delay: Delay value for TXD timing. Range value is 0~0x7F, 0x30 as
default.
+ - rx_delay: Delay value for RXD timing. Range value is 0~0x7F, 0x10 as
default.
+ - pmu_regulator: PMIC's integrated LDO power for PHY. Can be "act_ldo5".
+ - pmu_enable_level: Enable level of LDO. Can be <1> or <0>. 1->HIGH, 0->LOW.
+ - power-gpio: GPIO used to control PHY power. Normally,
+ power-gpio and pmu_regulator can not be used at the same time.
+ - phyirq-gpio: GPIO used as PHY irq.
+
+Example:
+
+gmac: ethernet@ff290000 {
+ compatible = "rockchip,rk3288-gmac";
+ reg = <0xff290000 0x10000>;
+ interrupts = <GIC_SPI 27 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "macirq";
+ rockchip,grf = <&grf>;
+ clocks = <&cru SCLK_MAC>, <&cru SCLK_MAC_PLL>,
+ <&cru SCLK_MAC_RX>, <&cru SCLK_MAC_TX>,
+ <&cru SCLK_MACREF>, <&cru SCLK_MACREF_OUT>,
+ <&cru ACLK_GMAC>, <&cru PCLK_GMAC>;
+ clock-names = "stmmaceth", "clk_mac_pll",
+ "mac_clk_rx", "mac_clk_tx",
+ "clk_mac_ref", "clk_mac_refout",
+ "aclk_mac", "pclk_mac";
+ phy-mode = "rgmii";
+ pinctrl-names = "default";
+ pinctrl-0 = <&rgmii_pins /*&rmii_pins*/>;
+
+ clock_in_out = "input";
+ assigned-clocks = <&cru SCLK_MAC>;
+ assigned-clock-parents = <&ext_gmac>;
+ tx_delay = <0x30>;
+ rx_delay = <0x10>;
+
+ power-gpio = <&gpio0 6 GPIO_ACTIVE_HIGH>;
+ reset-gpio = <&gpio4 7 GPIO_ACTIVE_LOW>;
+
+ status = "ok";
+};
--
1.7.9.5
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