From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maxime Ripard Subject: Re: [PATCH v2 3/5] ARM: sun8i: dt: Add DT bindings documentation for Allwinner sun8i-emac Date: Thu, 28 Jul 2016 20:49:16 +0200 Message-ID: <20160728184916.GF6682@lukather> References: <1469001800-11615-1-git-send-email-clabbe.montjoie@gmail.com> <1469001800-11615-4-git-send-email-clabbe.montjoie@gmail.com> <20160721075519.GC5993@lukather> <20160728134031.GC7582@Red> Reply-To: maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="vKFfOv5t3oGVpiF+" Return-path: Sender: linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org Content-Disposition: inline In-Reply-To: <20160728134031.GC7582@Red> List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , To: LABBE Corentin Cc: robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, wens-jdAy2FN1RRM@public.gmane.org, linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org, davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org List-Id: devicetree@vger.kernel.org --vKFfOv5t3oGVpiF+ Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline On Thu, Jul 28, 2016 at 03:40:31PM +0200, LABBE Corentin wrote: > On Thu, Jul 21, 2016 at 09:55:19AM +0200, Maxime Ripard wrote: > > Hi, > > > > On Wed, Jul 20, 2016 at 10:03:18AM +0200, LABBE Corentin wrote: > > > This patch adds documentation for Device-Tree bindings for the > > > Allwinner sun8i-emac driver. > > > > > > Signed-off-by: LABBE Corentin > > > --- > > > .../bindings/net/allwinner,sun8i-emac.txt | 65 ++++++++++++++++++++++ > > > 1 file changed, 65 insertions(+) > > > create mode 100644 Documentation/devicetree/bindings/net/allwinner,sun8i-emac.txt > > > > > > diff --git a/Documentation/devicetree/bindings/net/allwinner,sun8i-emac.txt b/Documentation/devicetree/bindings/net/allwinner,sun8i-emac.txt > > > new file mode 100644 > > > index 0000000..4bf4e53 > > > --- /dev/null > > > +++ b/Documentation/devicetree/bindings/net/allwinner,sun8i-emac.txt > > > @@ -0,0 +1,65 @@ > > > +* Allwinner sun8i EMAC ethernet controller > > > + > > > +Required properties: > > > +- compatible: "allwinner,sun8i-a83t-emac", "allwinner,sun8i-h3-emac", > > > + or "allwinner,sun50i-a64-emac" > > > +- reg: address and length of the register sets for the device. > > > +- reg-names: should be "emac" and "syscon", matching the register sets > > > > Blindly mapping a register of some other device on the SoC doesn't > > look very reasonable. > > As we discuss after this mail on IRC, this register is dedicated to EMAC. I don't think we did. It's still right in the middle of some other hardware block register space. You actually have a syscon driver to do just that, why not use it? > > > +See ethernet.txt in the same directory for generic bindings for ethernet > > > +controllers. > > > + > > > +The device node referenced by "phy" or "phy-handle" should be a child node > > > +of this node. See phy.txt for the generic PHY bindings. > > > + > > > +Optional properties: > > > +- phy-supply: phandle to a regulator if the PHY needs one > > > +- phy-io-supply: phandle to a regulator if the PHY needs a another one for I/O. > > > + This is sometimes found with RGMII PHYs, which use a second > > > + regulator for the lower I/O voltage. > > > +- allwinner,tx-delay: The setting of the TX clock delay chain > > > +- allwinner,rx-delay: The setting of the RX clock delay chain > > > > In which unit? What is the default value? > > The unit is unknown to me, but I have added a comment for the > default and acceptable range value. That's unfortunate. We'll see how the DT maintainers feel about that. Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com --vKFfOv5t3oGVpiF+--