Date: Fri, 6 Sep 2024 18:03:39 +0000 From: Mike Belanger <mibelanger@blackberry.com> To: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Ethernet device with shared mdio Message-ID: <YQXPR01MB4198A8ED40891B0B51B5A4F6BC9E2@YQXPR01MB4198.CANPRD01.PROD.OUTLOOK.COM>
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The following device tree specifies a shared mdio.
The ffec driver uses miibus.
When there is a shared mdio, one of the device instances will not be able t=
o properly configure the PHY, as it needs to use the other devices resource=
to read/write the PHY.
&fec1 {
pinctrl-names =3D "default";
pinctrl-0 =3D <&pinctrl_fec1>;
phy-mode =3D "rgmii-id";
phy-handle =3D <ðphy0>;
fsl,magic-packet;
status =3D "okay";
mdio {
#address-cells =3D <1>;
#size-cells =3D <0>;
ethphy0: ethernet-phy@0 {
compatible =3D "ethernet-ph=
y-ieee802.3-c22";
reg =3D <0>;
};
ethphy1: ethernet-phy@1 {
compatible =3D "ethernet-ph=
y-ieee802.3-c22";
reg =3D <1>;
};
};
};
&fec2 {
pinctrl-names =3D "default";
pinctrl-0 =3D <&pinctrl_fec2>;
phy-mode =3D "rgmii-txid";
phy-handle =3D <ðphy1>;
phy-supply =3D <®_fec2_supply>;
nvmem-cells =3D <&fec_mac1>;
nvmem-cell-names =3D "mac-address";
rx-internal-delay-ps =3D <2000>;
fsl,magic-packet;
status =3D "okay";
};
Does FreeBSD have any plans for supporting hardware that specifies a shared=
mdio in the dtb?
Just knowing the general approach being considered would be helpful.
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">The following devic=
e tree specifies a shared mdio.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">The ffec driver use=
s miibus.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">When there is a sha=
red mdio, one of the device instances will not be able to properly configur=
e the PHY, as it needs to use the other devices resource to read/write the =
PHY.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> <o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">&fec1 {<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; pin=
ctrl-names =3D "default";<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; pin=
ctrl-0 =3D <&pinctrl_fec1>;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; phy=
-mode =3D "rgmii-id";<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; phy=
-handle =3D <&ethphy0>;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; fsl=
,magic-packet;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; sta=
tus =3D "okay";<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> <o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; mdi=
o {<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; &nbs=
p; &=
nbsp; #address-cells =3D <1>;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; &nbs=
p; &=
nbsp; #size-cells =3D <0>;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> <o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; &nbs=
p; &=
nbsp; ethphy0: ethernet-phy@0 {<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; &nbs=
p; &=
nbsp; &nbs=
p; compatible =3D "ethernet-phy-ie=
ee802.3-c22";<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; &nbs=
p; &=
nbsp; &nbs=
p; reg =3D <0>;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; &nbs=
p; &=
nbsp; };<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> <o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; &nbs=
p; &=
nbsp; ethphy1: ethernet-phy@1 {<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; &nbs=
p; &=
nbsp; &nbs=
p; compatible =3D "ethernet-phy-ie=
ee802.3-c22";<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; &nbs=
p; &=
nbsp; &nbs=
p; reg =3D <1>;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; &nbs=
p; &=
nbsp; };<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; };<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">};<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> <o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">&fec2 {<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; pin=
ctrl-names =3D "default";<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; pin=
ctrl-0 =3D <&pinctrl_fec2>;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; phy=
-mode =3D "rgmii-txid";<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; phy=
-handle =3D <&ethphy1>;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; phy=
-supply =3D <&reg_fec2_supply>;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; nvm=
em-cells =3D <&fec_mac1>;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; nvm=
em-cell-names =3D "mac-address";<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; rx-=
internal-delay-ps =3D <2000>;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; fsl=
,magic-packet;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> &=
nbsp; sta=
tus =3D "okay";<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">};<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"> <o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Does FreeBSD have a=
ny plans for supporting hardware that specifies a shared mdio in the dtb?<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Just knowing the ge=
neral approach being considered would be helpful.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p> </o:p></=
span></p>
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<HR>This transmission (including any attachments) may contain confidential =
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mation. Any use of this information by anyone other than the intended recip=
ient is prohibited. If you have received this transmission in error, please=
immediately reply to the sender and delete this information from your syst=
em. Use, dissemination, distribution, or reproduction of this transmission =
by unintended recipients is not authorized and may be unlawful.<BR>
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