From: Grygorii Strashko <grygorii.strashko@ti.com>
To: Tony Lindgren <tony@atomide.com>, Mugunthan V N <mugunthanvnm@ti.com>
Cc: linux-omap@vger.kernel.org, Sekhar Nori <nsekhar@ti.com>,
netdev@vger.kernel.org,
Grygorii Strashko <grygorii.strashko@ti.com>
Subject: [PATCH] ARM: dts: am57xx-beagle-x15: implement errata "Ethernet RGMII2 Limited to 10/100 Mbps"
Date: Thu, 12 Jan 2017 11:14:29 -0600 [thread overview]
Message-ID: <20170112171429.8106-1-grygorii.strashko@ti.com> (raw)
According to errata i880 description the speed of Ethernet port 1 on AM572x
SoCs rev 1.1 shuld 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>
---
arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi | 14 ++++++++++++--
arch/arm/boot/dts/am57xx-beagle-x15-revb1.dts | 5 +++++
arch/arm/boot/dts/am57xx-beagle-x15.dts | 5 +++++
3 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi b/arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi
index 78bee26..0429fa0 100644
--- a/arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi
+++ b/arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi
@@ -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>;
};
diff --git a/arch/arm/boot/dts/am57xx-beagle-x15-revb1.dts b/arch/arm/boot/dts/am57xx-beagle-x15-revb1.dts
index ca85570..39a92af 100644
--- a/arch/arm/boot/dts/am57xx-beagle-x15-revb1.dts
+++ b/arch/arm/boot/dts/am57xx-beagle-x15-revb1.dts
@@ -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>;
+};
diff --git a/arch/arm/boot/dts/am57xx-beagle-x15.dts b/arch/arm/boot/dts/am57xx-beagle-x15.dts
index 8c66f2e..19a60a1 100644
--- a/arch/arm/boot/dts/am57xx-beagle-x15.dts
+++ b/arch/arm/boot/dts/am57xx-beagle-x15.dts
@@ -22,3 +22,8 @@
&mmc1 {
vmmc-supply = <&ldo1_reg>;
};
+
+/* errata i880 "Ethernet RGMII2 Limited to 10/100 Mbps" */
+&phy1 {
+ max-speed = <100>;
+};
--
2.10.1.dirty
next reply other threads:[~2017-01-12 17:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-12 17:14 Grygorii Strashko [this message]
2017-01-12 22:53 ` [PATCH] ARM: dts: am57xx-beagle-x15: implement errata "Ethernet RGMII2 Limited to 10/100 Mbps" Tony Lindgren
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