Documentation/devicetree/bindings/net/stm32-dwmac.txt

   1 STMicroelectronics STM32 / MCU DWMAC glue layer controller
   2
   3 This file documents platform glue layer for stmmac.
   4 Please see stmmac.txt for the other unchanged properties.
   5
   6 The device node has following properties.
   7
   8 Required properties:
   9 - compatible:  For MCU family should be "st,stm32-dwmac" to select glue, and
  10                "snps,dwmac-3.50a" to select IP version.
  11                For MPU family should be "st,stm32mp1-dwmac" to select
  12                glue, and "snps,dwmac-4.20a" to select IP version.
  13 - clocks: Must contain a phandle for each entry in clock-names.
  14 - clock-names: Should be "stmmaceth" for the host clock.
  15                Should be "mac-clk-tx" for the MAC TX clock.
  16                Should be "mac-clk-rx" for the MAC RX clock.
  17                For MPU family need to add also "ethstp" for power mode clock
  18 - interrupt-names: Should contain a list of interrupt names corresponding to
  19            the interrupts in the interrupts property, if available.
  20                    Should be "macirq" for the main MAC IRQ
  21                    Should be "eth_wake_irq" for the IT which wake up system
  22 - st,syscon : Should be phandle/offset pair. The phandle to the syscon node which
  23                encompases the glue register, and the offset of the control register.
  24
  25 Optional properties:
  26 - clock-names:     For MPU family "eth-ck" for PHY without quartz
  27 - st,eth-clk-sel (boolean) : set this property in RGMII PHY when you want to select RCC clock instead of ETH_CLK125.
  28 - st,eth-ref-clk-sel (boolean) :  set this property in RMII mode when you have PHY without crystal 50MHz and want to select RCC clock instead of ETH_REF_CLK.
  29
  30 Example:
  31
  32         ethernet@40028000 {
  33                 compatible = "st,stm32-dwmac", "snps,dwmac-3.50a";
  34                 reg = <0x40028000 0x8000>;
  35                 reg-names = "stmmaceth";
  36                 interrupts = <0 61 0>, <0 62 0>;
  37                 interrupt-names = "macirq", "eth_wake_irq";
  38                 clock-names = "stmmaceth", "mac-clk-tx", "mac-clk-rx";
  39                 clocks = <&rcc 0 25>, <&rcc 0 26>, <&rcc 0 27>;
  40                 st,syscon = <&syscfg 0x4>;
  41                 snps,pbl = <8>;
  42                 snps,mixed-burst;
  43                 dma-ranges;
  44         };