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Date:   Sun, 19 Apr 2020 06:01:05 +0200
From:   Marek Behun <marek.behun@nic.cz>
To:     Pali =?UTF-8?B?Um9ow6Fy?= <pali@kernel.org>
Cc:     Jason Cooper <jason@lakedaemon.net>, Andrew Lunn <andrew@lunn.ch>,
        Gregory Clement <gregory.clement@bootlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Andrew Murray <amurray@thegoodpenguin.co.uk>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Remi Pommarel <repk@triplefau.lt>,
        Tomasz Maciej Nowak <tmn505@gmail.com>,
        Xogium <contact@xogium.me>, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org
Subject: Re: [PATCH 0/8] PCI: aardvark: Fix support for Turris MOX and
 Compex wifi cards
Message-ID: <20200419060105.4c7bc4a5@nic.cz>
In-Reply-To: <20200415160054.951-1-pali@kernel.org>
References: <20200415160054.951-1-pali@kernel.org>
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Pali, I tested this series with Compex WLE900VX and with a ASMedia SATA
card.

Both are visible with these patches.

But if I enable the pci-driver in U-Boot, kernel reports "link
never came up" fo the WLE900VX card. The SATA card works in this case.

advk-pcie d0070000.pcie: issuing PERST via reset GPIO for 1ms
advk-pcie d0070000.pcie: setup link speed to 2
advk-pcie d0070000.pcie: link never came up
advk-pcie d0070000.pcie: setup link speed to 1
advk-pcie d0070000.pcie: link never came up

We should try to somehow reset the whole PCIe controller in Linux. There
are the PCIe Core Warm Reset and PCIe PHY Warm Reset register. I also think
that maybe we should try to reset the whole PCI comphy.

Marek