target/linux/mvebu/patches-5.10/005-v5.11-ARM-dts-turris-omnia-add-SFP-node.patch

   1 From add2d65962977caf23ca2fa21a2457d31b636574 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel@kernel.org>
   3 Date: Mon, 16 Nov 2020 13:24:22 +0100
   4 Subject: ARM: dts: turris-omnia: add SFP node
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 Turris Omnia has an SFP cage that, together with WAN PHY, is connected
  10 to eth2 SerDes via a SerDes multiplexor. When a SFP module is present,
  11 the multiplexor switches the SerDes signal from PHY to SFP.
  12
  13 Describe the SFP cage, but leave it disabled. Until phylink has support
  14 for such configuration, we are leaving it to U-Boot to enable SFP and
  15 disable WAN PHY at boot time depending on whether a SFP module is
  16 present.
  17
  18 Signed-off-by: Marek Behún <kabel@kernel.org>
  19 Fixes: 26ca8b52d6e1 ("ARM: dts: add support for Turris Omnia")
  20 Reviewed-by: Andrew Lunn <andrew@lunn.ch>
  21 Cc: Russell King - ARM Linux admin <linux@armlinux.org.uk>
  22 Cc: linux-arm-kernel@lists.infradead.org
  23 Cc: Uwe Kleine-König <uwe@kleine-koenig.org>
  24 Cc: Jason Cooper <jason@lakedaemon.net>
  25 Cc: Gregory CLEMENT <gregory.clement@bootlin.com>
  26 Cc: Andreas Färber <afaerber@suse.de>
  27 Cc: Rob Herring <robh+dt@kernel.org>
  28 Cc: devicetree@vger.kernel.org
  29 Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
  30 ---
  31  arch/arm/boot/dts/armada-385-turris-omnia.dts | 30 ++++++++++++++++++++++++++-
  32  1 file changed, 29 insertions(+), 1 deletion(-)
  33
  34 --- a/arch/arm/boot/dts/armada-385-turris-omnia.dts
  35 +++ b/arch/arm/boot/dts/armada-385-turris-omnia.dts
  36 @@ -88,6 +88,24 @@
  37                         };
  38                 };
  39         };
  40 +
  41 +       sfp: sfp {
  42 +               compatible = "sff,sfp";
  43 +               i2c-bus = <&sfp_i2c>;
  44 +               tx-fault-gpios = <&pcawan 0 GPIO_ACTIVE_HIGH>;
  45 +               tx-disable-gpios = <&pcawan 1 GPIO_ACTIVE_HIGH>;
  46 +               rate-select0-gpios = <&pcawan 2 GPIO_ACTIVE_HIGH>;
  47 +               los-gpios = <&pcawan 3 GPIO_ACTIVE_HIGH>;
  48 +               mod-def0-gpios = <&pcawan 4 GPIO_ACTIVE_LOW>;
  49 +               maximum-power-milliwatt = <3000>;
  50 +
  51 +               /*
  52 +                * For now this has to be enabled at boot time by U-Boot when
  53 +                * a SFP module is present. Read more in the comment in the
  54 +                * eth2 node below.
  55 +                */
  56 +               status = "disabled";
  57 +       };
  58  };
  59
  60  &bm {
  61 @@ -132,10 +150,20 @@
  62
  63  /* WAN port */
  64  &eth2 {
  65 +       /*
  66 +        * eth2 is connected via a multiplexor to both the SFP cage and to
  67 +        * ethernet-phy@1. The multiplexor switches the signal to SFP cage when
  68 +        * a SFP module is present, as determined by the mode-def0 GPIO.
  69 +        *
  70 +        * Until kernel supports this configuration properly, in case SFP module
  71 +        * is present, U-Boot has to enable the sfp node above, remove phy
  72 +        * handle and add managed = "in-band-status" property.
  73 +        */
  74         status = "okay";
  75         phy-mode = "sgmii";
  76         phy = <&phy1>;
  77         phys = <&comphy5 2>;
  78 +       sfp = <&sfp>;
  79         buffer-manager = <&bm>;
  80         bm,pool-long = <2>;
  81         bm,pool-short = <3>;
  82 @@ -201,7 +229,7 @@
  83                         /* routed to PCIe2 connector (CN62A) */
  84                 };
  85
  86 -               i2c@4 {
  87 +               sfp_i2c: i2c@4 {
  88                         #address-cells = <1>;
  89                         #size-cells = <0>;
  90                         reg = <4>;