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56 lines
2.4 KiB
Diff
56 lines
2.4 KiB
Diff
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From d4539512edd83737f51377e3e87512040133628a Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Tue, 27 Nov 2018 16:56:50 +0000
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Subject: [PATCH 445/454] BCM270X_DT: Add new Ethernet DT parameters
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Add "eth_downshift_after" DT parameter to allow the delay before the
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downshift to be specified. The default is 2 auto-negotiation cycles,
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and legal values are 2, 3, 4, 5 and 0 (disabled).
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Add "eth_max_speed" DT parameter as a way of prohibiting 1000Mbps
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links. This can be used to avoid the delay until the downshift mechanism
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activates. Legal values are 10, 100 and 1000, where the default is
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unlimited (effectively 1000Mbps).
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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arch/arm/boot/dts/bcm283x-rpi-lan7515.dtsi | 2 ++
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arch/arm/boot/dts/overlays/README | 9 +++++++++
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2 files changed, 11 insertions(+)
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--- a/arch/arm/boot/dts/bcm283x-rpi-lan7515.dtsi
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+++ b/arch/arm/boot/dts/bcm283x-rpi-lan7515.dtsi
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@@ -48,5 +48,7 @@
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tx_lpi_timer = <ðernet>,"microchip,tx-lpi-timer:0";
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eth_led0 = <ðernet>,"microchip,led-modes:0";
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eth_led1 = <ðernet>,"microchip,led-modes:4";
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+ eth_downshift_after = <ð_phy>,"microchip,downshift-after:0";
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+ eth_max_speed = <ð_phy>,"max-speed:0";
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};
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};
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -98,6 +98,11 @@ Params:
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compatible devices (default "on"). See also
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"tx_lpi_timer".
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+ eth_downshift_after Set the number of auto-negotiation failures
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+ after which the 1000Mbps modes are disabled.
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+ Legal values are 2, 3, 4, 5 and 0, where
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+ 0 means never downshift (default 2).
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+
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eth_led0 Set mode of LED0 (usually orange) (default
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"1"). The legal values are:
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0=link/activity 1=link1000/activity
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@@ -108,6 +113,10 @@ Params:
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eth_led1 Set mode of LED1 (usually green) (default
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"6"). See eth_led0 for legal values.
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+ eth_max_speed Set the maximum speed a link is allowed
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+ to negotiate. Legal values are 10, 100 and
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+ 1000 (default 1000).
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+
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i2c_arm Set to "on" to enable the ARM's i2c interface
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(default "off")
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