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* [PATCH AUTOSEL 5.10 01/19] ARM: dts: ls1021a-tsn: update RGMII delays for sja1105 switch
@ 2021-12-21  1:58 Sasha Levin
  2021-12-21  1:58 ` [PATCH AUTOSEL 5.10 02/19] ARM: rockchip: Use memcpy_toio instead of memcpy on smp bring-up Sasha Levin
                   ` (17 more replies)
  0 siblings, 18 replies; 19+ messages in thread
From: Sasha Levin @ 2021-12-21  1:58 UTC (permalink / raw)
  To: linux-kernel, stable
  Cc: Vladimir Oltean, Florian Fainelli, Shawn Guo, Sasha Levin,
	leoyang.li, robh+dt, linux-arm-kernel, devicetree

From: Vladimir Oltean <vladimir.oltean@nxp.com>

[ Upstream commit e691f9282a89e24a8e87cdb91a181c6283ee5124 ]

In the new behavior, the sja1105 driver expects there to be explicit
RGMII delays present on the fixed-link ports, otherwise it will complain
that it falls back to legacy behavior, which is to apply RGMII delays
incorrectly derived from the phy-mode string.

In this case, the legacy behavior of the driver is to not apply delays
in any direction (mostly because the SJA1105T can't do that, so this
board uses PCB traces). To preserve that but also silence the driver,
use explicit delays of 0 ns. The delay information from the phy-mode is
ignored by new kernels (it's still RGMII as long as it's "rgmii*"
something), and the explicit {rx,tx}-internal-delay-ps properties are
ignored by old kernels, so the change works both ways.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arm/boot/dts/ls1021a-tsn.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/ls1021a-tsn.dts b/arch/arm/boot/dts/ls1021a-tsn.dts
index aca78b5eddf20..194748737724c 100644
--- a/arch/arm/boot/dts/ls1021a-tsn.dts
+++ b/arch/arm/boot/dts/ls1021a-tsn.dts
@@ -90,6 +90,8 @@ port@4 {
 				/* Internal port connected to eth2 */
 				ethernet = <&enet2>;
 				phy-mode = "rgmii";
+				rx-internal-delay-ps = <0>;
+				tx-internal-delay-ps = <0>;
 				reg = <4>;
 
 				fixed-link {
-- 
2.34.1


^ permalink raw reply related	[flat|nested] 19+ messages in thread
end of thread, other threads:[~2021-12-21  2:00 UTC | newest]

Thread overview: 19+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-12-21  1:58 [PATCH AUTOSEL 5.10 01/19] ARM: dts: ls1021a-tsn: update RGMII delays for sja1105 switch Sasha Levin
2021-12-21  1:58 ` [PATCH AUTOSEL 5.10 02/19] ARM: rockchip: Use memcpy_toio instead of memcpy on smp bring-up Sasha Levin
2021-12-21  1:58 ` [PATCH AUTOSEL 5.10 03/19] mac80211: set up the fwd_skb->dev for mesh forwarding Sasha Levin
2021-12-21  1:58 ` [PATCH AUTOSEL 5.10 04/19] mac80211: fix a memory leak where sta_info is not freed Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 05/19] nl80211: reset regdom when reloading regdb Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 06/19] iwlwifi: fix LED dependencies Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 07/19] phonet: refcount leak in pep_sock_accep Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 08/19] net: bcmgenet: Fix NULL vs IS_ERR() checking Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 09/19] scsi: pm8001: Fix phys_to_virt() usage on dma_addr_t Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 10/19] mac80211: Fix the size used for building probe request Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 11/19] mac80211: update channel context before station state Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 12/19] mac80211: do drv_reconfig_complete() before restarting all Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 13/19] drm/amd/display: Reset DMCUB before HW init Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 14/19] drm/amdgpu: correct the wrong cached state for GMC on PICASSO Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 15/19] block: reduce kblockd_mod_delayed_work_on() CPU consumption Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 16/19] net: usb: lan78xx: add Allied Telesis AT29M2-AF Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 17/19] virtio_net: fix rx_drops stat for small pkts Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 18/19] bpf: Make 32->64 bounds propagation slightly more robust Sasha Levin
2021-12-21  1:59 ` [PATCH AUTOSEL 5.10 19/19] Revert "block: reduce kblockd_mod_delayed_work_on() CPU consumption" Sasha Levin

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