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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: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
zero-colors
Grygorii Strashko 2017-01-12 11:14:29 -06:00 committed by Tony Lindgren
parent c554a6d8fe
commit 52349a2abf
3 changed files with 22 additions and 2 deletions
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14
arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi
View File

@ -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>;
};

5
arch/arm/boot/dts/am57xx-beagle-x15-revb1.dts
View File

@ -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>;
};

5
arch/arm/boot/dts/am57xx-beagle-x15.dts
View File

@ -22,3 +22,8 @@
&mmc1 {
vmmc-supply = <&ldo1_reg>;
};
/* errata i880 "Ethernet RGMII2 Limited to 10/100 Mbps" */
&phy1 {
max-speed = <100>;
};