[PATCH v6 3/6] arm64: dts: allwinner: orange-pi-3: Enable ethernet
From: <hidden>
Date: 2019-05-27 16:22:45
Also in:
dri-devel, linux-arm-kernel, linux-devicetree, lkml
Subsystem:
arm/allwinner sunxi soc support, the rest · Maintainers:
Chen-Yu Tsai, Jernej Skrabec, Samuel Holland, Linus Torvalds
From: Ondrej Jirman <redacted> Orange Pi 3 has two regulators that power the Realtek RTL8211E. According to the phy datasheet, both regulators need to be enabled at the same time, but we can only specify a single phy-supply in the DT. This can be achieved by making one regulator depedning on the other via vin-supply. While it's not a technically correct description of the hardware, it achieves the purpose. All values of RX/TX delay were tested exhaustively and a middle one of the working values was chosen. Signed-off-by: Ondrej Jirman <redacted> --- .../dts/allwinner/sun50i-h6-orangepi-3.dts | 44 +++++++++++++++++++ 1 file changed, 44 insertions(+)
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts
index 17d496990108..2c6807b74ff6 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts@@ -15,6 +15,7 @@ aliases { serial0 = &uart0; + ethernet0 = &emac; }; chosen {
@@ -44,6 +45,27 @@ regulator-max-microvolt = <5000000>; regulator-always-on; }; + + /* + * The board uses 2.5V RGMII signalling. Power sequence to enable + * the phy is to enable GMAC-2V5 and GMAC-3V (aldo2) power rails + * at the same time and to wait 100ms. + */ + reg_gmac_2v5: gmac-2v5 { + compatible = "regulator-fixed"; + regulator-name = "gmac-2v5"; + regulator-min-microvolt = <2500000>; + regulator-max-microvolt = <2500000>; + startup-delay-us = <100000>; + enable-active-high; + gpio = <&pio 3 6 GPIO_ACTIVE_HIGH>; /* PD6 */ + + /* The real parent of gmac-2v5 is reg_vcc5v, but we need to + * enable two regulators to power the phy. This is one way + * to achieve that. + */ + vin-supply = <®_aldo2>; /* GMAC-3V */ + }; }; &cpu0 {
@@ -58,6 +80,28 @@ status = "okay"; }; +&emac { + pinctrl-names = "default"; + pinctrl-0 = <&ext_rgmii_pins>; + phy-mode = "rgmii"; + phy-handle = <&ext_rgmii_phy>; + phy-supply = <®_gmac_2v5>; + allwinner,rx-delay-ps = <1500>; + allwinner,tx-delay-ps = <700>; + status = "okay"; +}; + +&mdio { + ext_rgmii_phy: ethernet-phy@1 { + compatible = "ethernet-phy-ieee802.3-c22"; + reg = <1>; + + reset-gpios = <&pio 3 14 GPIO_ACTIVE_LOW>; /* PD14 */ + reset-assert-us = <15000>; + reset-deassert-us = <40000>; + }; +}; + &mmc0 { vmmc-supply = <®_cldo1>; cd-gpios = <&pio 5 6 GPIO_ACTIVE_LOW>; /* PF6 */
--
2.21.0