From: Michael Walle <michael@walle.cc>
To: Vladimir Oltean <vladimir.oltean@nxp.com>
Cc: devicetree@vger.kernel.org, netdev@vger.kernel.org,
Shawn Guo <shawnguo@kernel.org>, Li Yang <leoyang.li@nxp.com>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH devicetree 0/3] NXP LS1028A DT changes for multiple switch CPU ports
Date: Thu, 18 Aug 2022 16:49:49 +0200 [thread overview]
Message-ID: <8d3d96cdede2f1e40ed9ae5742a0468d@walle.cc> (raw)
In-Reply-To: <20220818140519.2767771-1-vladimir.oltean@nxp.com>
Am 2022-08-18 16:05, schrieb Vladimir Oltean:
> The Ethernet switch embedded within the NXP LS1028A has 2 Ethernet
> ports
> towards the host, for local packet termination. In current device
> trees,
> only the first port is enabled. Enabling the second port allows having
> a
> higher termination throughput.
Is it used automatically or does the userspace has to configure
something?
> Care has been taken that this change does not produce regressions when
> using updated device trees with old kernels that do not support
> multiple
> DSA CPU ports. The only difference for old kernels will be the
> appearance of a new net device (for &enetc_port3) which will not be
> very
> useful for much of anything.
Mh, I don't understand. Does it now cause regressions or not? I mean
besides that there is a new unused interface?
I was just thinking of that systemready stuff where the u-boot might
supply its (newer) device tree to an older kernel, i.e. an older debian
or similar.
-michael
next prev parent reply other threads:[~2022-08-18 14:50 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-18 14:05 [PATCH devicetree 0/3] NXP LS1028A DT changes for multiple switch CPU ports Vladimir Oltean
2022-08-18 14:05 ` [PATCH devicetree 1/3] arm64: dts: ls1028a: move DSA CPU port property to the common SoC dtsi Vladimir Oltean
2022-08-18 14:45 ` Michael Walle
2022-08-18 14:05 ` [PATCH devicetree 2/3] arm64: dts: ls1028a: mark enetc port 3 as a DSA master too Vladimir Oltean
2022-08-18 14:44 ` Michael Walle
2022-08-18 14:45 ` Vladimir Oltean
2022-08-18 15:08 ` Michael Walle
2022-08-22 3:53 ` Shawn Guo
2022-08-18 14:05 ` [PATCH devicetree 3/3] arm64: dts: ls1028a: enable swp5 and eno3 for all boards Vladimir Oltean
2022-08-18 15:06 ` Michael Walle
2022-08-18 14:49 ` Michael Walle [this message]
2022-08-18 14:55 ` [PATCH devicetree 0/3] NXP LS1028A DT changes for multiple switch CPU ports Vladimir Oltean
2022-08-18 15:05 ` Michael Walle
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