From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maxime Ripard Subject: Re: [PATCH 07/12] arm64: dts: allwinner: orange-pi-3: Enable ethernet Date: Mon, 8 Apr 2019 09:40:42 +0200 Message-ID: <20190408074042.74s5qckukcpore3e@flea> References: <20190405234514.6183-1-megous@megous.com> <20190405234514.6183-8-megous@megous.com> Reply-To: maxime.ripard-LDxbnhwyfcJBDgjK7y7TUQ@public.gmane.org Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="b4c2cydsu6ghev6c" Return-path: Sender: linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org Content-Disposition: inline In-Reply-To: <20190405234514.6183-8-megous-5qf/QAjKc83QT0dZR+AlfA@public.gmane.org> List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , To: megous-5qf/QAjKc83QT0dZR+AlfA@public.gmane.org Cc: linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, Chen-Yu Tsai , Rob Herring , Linus Walleij , David Airlie , Daniel Vetter , Mark Rutland , Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , "David S. Miller" , Maxime Coquelin , Arend van Spriel , Franky Lin , Hante Meuleman , Chi-Hsien Lin , Wright Feng , Kalle Valo , Naveen Gupta , dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, netdev@v List-Id: devicetree@vger.kernel.org --b4c2cydsu6ghev6c Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline On Sat, Apr 06, 2019 at 01:45:09AM +0200, megous-5qf/QAjKc83QT0dZR+AlfA@public.gmane.org wrote: > From: Ondrej Jirman > > 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 > --- > .../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 644946749088..5270142527f5 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 { > @@ -64,6 +65,27 @@ > 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-3V3 (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 */ Is enable-active-high still needed? It's redundant with the GPIO_ACTIVE_HIGH flag. The indentation is wrong here as well. Maxime -- Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com --b4c2cydsu6ghev6c--