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87d9fa6470
Add fallback compatibility strings for R-Car Gen 1 and 2. In the case of Renesas R-Car hardware we know that there are generations of SoCs, f.e. Gen 1 and 2. But beyond that its not clear what the relationship between IP blocks might be. For example, I believe that r8a7790 is older than r8a7791 but that doesn't imply that the latter is a descendant of the former or vice versa. We can, however, by examining the documentation and behaviour of the hardware at run-time observe that the current driver implementation appears to be compatible with the IP blocks on SoCs within a given generation. For the above reasons and convenience when enabling new SoCs a per-generation fallback compatibility string scheme is being adopted for drivers for Renesas SoCs. Note that R-Car Gen2 and RZ/G1 have many compatible IP blocks. The approach that has been consistently taken for other IP blocks is to name common code, compatibility strings and so on after R-Car Gen2. Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: David S. Miller <davem@davemloft.net>
70 lines
2.8 KiB
Plaintext
70 lines
2.8 KiB
Plaintext
* Renesas Electronics SH EtherMAC
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This file provides information on what the device node for the SH EtherMAC
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interface contains.
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Required properties:
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- compatible: Must contain one or more of the following:
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"renesas,gether-r8a7740" if the device is a part of R8A7740 SoC.
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"renesas,ether-r8a7743" if the device is a part of R8A7743 SoC.
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"renesas,ether-r8a7745" if the device is a part of R8A7745 SoC.
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"renesas,ether-r8a7778" if the device is a part of R8A7778 SoC.
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"renesas,ether-r8a7779" if the device is a part of R8A7779 SoC.
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"renesas,ether-r8a7790" if the device is a part of R8A7790 SoC.
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"renesas,ether-r8a7791" if the device is a part of R8A7791 SoC.
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"renesas,ether-r8a7793" if the device is a part of R8A7793 SoC.
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"renesas,ether-r8a7794" if the device is a part of R8A7794 SoC.
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"renesas,ether-r7s72100" if the device is a part of R7S72100 SoC.
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"renesas,rcar-gen1-ether" for a generic R-Car Gen1 device.
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"renesas,rcar-gen2-ether" for a generic R-Car Gen2 or RZ/G1
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device.
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When compatible with the generic version, nodes must list
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the SoC-specific version corresponding to the platform
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first followed by the generic version.
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- reg: offset and length of (1) the E-DMAC/feLic register block (required),
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(2) the TSU register block (optional).
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- interrupts: interrupt specifier for the sole interrupt.
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- phy-mode: see ethernet.txt file in the same directory.
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- phy-handle: see ethernet.txt file in the same directory.
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- #address-cells: number of address cells for the MDIO bus, must be equal to 1.
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- #size-cells: number of size cells on the MDIO bus, must be equal to 0.
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- clocks: clock phandle and specifier pair.
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- pinctrl-0: phandle, referring to a default pin configuration node.
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Optional properties:
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- interrupt-parent: the phandle for the interrupt controller that services
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interrupts for this device.
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- pinctrl-names: pin configuration state name ("default").
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- renesas,no-ether-link: boolean, specify when a board does not provide a proper
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Ether LINK signal.
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- renesas,ether-link-active-low: boolean, specify when the Ether LINK signal is
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active-low instead of normal active-high.
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Example (Lager board):
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ethernet@ee700000 {
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compatible = "renesas,ether-r8a7790",
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"renesas,rcar-gen2-ether";
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reg = <0 0xee700000 0 0x400>;
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interrupt-parent = <&gic>;
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interrupts = <0 162 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&mstp8_clks R8A7790_CLK_ETHER>;
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phy-mode = "rmii";
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phy-handle = <&phy1>;
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pinctrl-0 = <ðer_pins>;
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pinctrl-names = "default";
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renesas,ether-link-active-low;
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#address-cells = <1>;
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#size-cells = <0>;
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phy1: ethernet-phy@1 {
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reg = <1>;
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interrupt-parent = <&irqc0>;
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interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
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pinctrl-0 = <&phy1_pins>;
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pinctrl-names = "default";
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};
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};
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