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Commit 52349a2a authored by Grygorii Strashko's avatar Grygorii Strashko Committed by Tony Lindgren
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ARM: dts: am57xx-beagle-x15: implement errata "Ethernet RGMII2 Limited to 10/100 Mbps" 

According to errata i880 description the speed of Ethernet port 1 on AM572x
SoCs rev 1.1 should be limited to 10/100Mbps, because RGMII2 Switching
Characteristics are not compatible with 1000 Mbps operation [1].
The issue is fixed with Rev 2.0 silicon.

Hence, rework Beagle-X15 and Begale-X15-revb1 to use phy-handle instead of
phy_id and apply corresponding limitation to the Ethernet Phy 1.

[1] http://www.ti.com/lit/er/sprz429j/sprz429j.pdf



Signed-off-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent c554a6d8

arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi

+12 −2
Original line number Diff line number Diff line
@@ -421,19 +421,29 @@ 
			      <&dra7_pmx_core 0x3f8>;

};



&davinci_mdio {

	phy0: ethernet-phy@1 {

		reg = <1>;

	};



	phy1: ethernet-phy@2 {

		reg = <2>;

	};

};



&mac {

	status = "okay";

	dual_emac;

};



&cpsw_emac0 {

	phy_id = <&davinci_mdio>, <1>;

	phy-handle = <&phy0>;

	phy-mode = "rgmii";

	dual_emac_res_vlan = <1>;

};



&cpsw_emac1 {

	phy_id = <&davinci_mdio>, <2>;

	phy-handle = <&phy1>;

	phy-mode = "rgmii";

	dual_emac_res_vlan = <2>;

};

arch/arm/boot/dts/am57xx-beagle-x15-revb1.dts

+5 −0
Original line number Diff line number Diff line
@@ -22,3 +22,8 @@ 
	vmmc-supply = <&vdd_3v3>;

	vmmc-aux-supply = <&ldo1_reg>;

};



/* errata i880 "Ethernet RGMII2 Limited to 10/100 Mbps" */

&phy1 {

	max-speed = <100>;

};

arch/arm/boot/dts/am57xx-beagle-x15.dts

+5 −0
Original line number Diff line number Diff line
@@ -22,3 +22,8 @@ 
&mmc1 {

	vmmc-supply = <&ldo1_reg>;

};



/* errata i880 "Ethernet RGMII2 Limited to 10/100 Mbps" */

&phy1 {

	max-speed = <100>;

};