linux-kernel - Re: [PATCH 2/8] dts: espressobin: Define max-link-speed for pcie0

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Date:   Sun, 19 Apr 2020 05:19:11 +0200
From:   Marek Behun <marek.behun@....cz>
To:     Pali Rohár <pali@...nel.org>
Cc:     Jason Cooper <jason@...edaemon.net>, Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Andrew Murray <amurray@...goodpenguin.co.uk>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Remi Pommarel <repk@...plefau.lt>,
        Tomasz Maciej Nowak <tmn505@...il.com>,
        Xogium <contact@...ium.me>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH 2/8] dts: espressobin: Define max-link-speed for pcie0

When chaning dts files in arch/arm64/boot/dts/marvell, use subject
prefix
  arm64: dts: marvell:
for espressobin for example
  arm64: dts: marvell: espressobin:

instead of
  dts: espressobin
or
  dts: aardvark

Marek


On Wed, 15 Apr 2020 18:00:48 +0200
Pali Rohár <pali@...nel.org> wrote:

> Previously aardvark PCI controller set speed to gen2. Now it reads speed
> from Device Tree and as default use maximal possible speed which is gen3.
> 
> Because Espressobin has advertised only PCI Express 2.0 capability and
> previous value was gen2, define max-link-speed to 2, so there would not be
> any configuration change.
> 
> Signed-off-by: Pali Rohár <pali@...nel.org>
> ---
>  arch/arm64/boot/dts/marvell/armada-3720-espressobin.dtsi | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dtsi b/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dtsi
> index 42e992f9c8a5..6705618162d5 100644
> --- a/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dtsi
> +++ b/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dtsi
> @@ -47,6 +47,7 @@
>  	phys = <&comphy1 0>;
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pcie_reset_pins &pcie_clkreq_pins>;
> +	max-link-speed = <2>;
>  };
>  
>  /* J6 */