target/linux/bcm27xx/patches-4.19/950-0196-BCM270X_DT-Add-new-Ethernet-DT-parameters.patch

   1 From 18867d71460b80385146e8d91a23cfb1729858f8 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Tue, 27 Nov 2018 16:56:50 +0000
   4 Subject: [PATCH] BCM270X_DT: Add new Ethernet DT parameters
   5
   6 Add "eth_downshift_after" DT parameter to allow the delay before the
   7 downshift to be specified. The default is 2 auto-negotiation cycles,
   8 and legal values are 2, 3, 4, 5 and 0 (disabled).
   9
  10 Add "eth_max_speed" DT parameter as a way of prohibiting 1000Mbps
  11 links. This can be used to avoid the delay until the downshift mechanism
  12 activates. Legal values are 10, 100 and 1000, where the default is
  13 unlimited (effectively 1000Mbps).
  14
  15 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  16 ---
  17  arch/arm/boot/dts/bcm283x-rpi-lan7515.dtsi | 2 ++
  18  arch/arm/boot/dts/overlays/README          | 9 +++++++++
  19  2 files changed, 11 insertions(+)
  20
  21 --- a/arch/arm/boot/dts/bcm283x-rpi-lan7515.dtsi
  22 +++ b/arch/arm/boot/dts/bcm283x-rpi-lan7515.dtsi
  23 @@ -50,5 +50,7 @@
  24                 tx_lpi_timer = <&eth_phy>,"microchip,tx-lpi-timer:0";
  25                 eth_led0 = <&eth_phy>,"microchip,led-modes:0";
  26                 eth_led1 = <&eth_phy>,"microchip,led-modes:4";
  27 +               eth_downshift_after = <&eth_phy>,"microchip,downshift-after";
  28 +               eth_max_speed = <&eth_phy>,"max-speed:0";
  29         };
  30  };
  31 --- a/arch/arm/boot/dts/overlays/README
  32 +++ b/arch/arm/boot/dts/overlays/README
  33 @@ -98,6 +98,11 @@ Params:
  34                                  compatible devices (default "on"). See also
  35                                  "tx_lpi_timer".
  36
  37 +        eth_downshift_after     Set the number of auto-negotiation failures
  38 +                                after which the 1000Mbps modes are disabled.
  39 +                                Legal values are 2, 3, 4, 5 and 0, where
  40 +                                0 means never downshift (default 2).
  41 +
  42          eth_led0                Set mode of LED0 (usually orange) (default
  43                                  "1"). The legal values are:
  44                                  0=link/activity          1=link1000/activity
  45 @@ -108,6 +113,10 @@ Params:
  46          eth_led1                Set mode of LED1 (usually green) (default
  47                                  "6"). See eth_led0 for legal values.
  48
  49 +        eth_max_speed           Set the maximum speed a link is allowed
  50 +                                to negotiate. Legal values are 10, 100 and
  51 +                                1000 (default 1000).
  52 +
  53          i2c_arm                 Set to "on" to enable the ARM's i2c interface
  54                                  (default "off")
  55