linux-kernel - Re: [PATCH v2] PCI: imx6: Assert i.MX8MM CLKREQ# even if no device present

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Date:   Thu, 17 Mar 2022 09:01:18 +0000
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Richard Zhu <hongxing.zhu@....com>, bhelgaas@...gle.com,
        l.stach@...gutronix.de
Cc:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>, linux-imx@....com,
        linux-arm-kernel@...ts.infradead.org, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH v2] PCI: imx6: Assert i.MX8MM CLKREQ# even if no device present

On Thu, 24 Feb 2022 11:06:53 +0800, Richard Zhu wrote:
> The CLKREQ# signal is an open drain, active low signal that is driven
> low by the remote Endpoint device. But it might not be driven low if no
> Endpoint device is connected.
> 
> On i.MX8MM PCIe, phy_init() may fail and system boot may hang if no
> Endpoint is connected to assert CLKREQ#.
> 
> [...]

Applied to pci/imx6, thanks!

[1/1] PCI: imx6: Assert i.MX8MM CLKREQ# even if no device present
      https://git.kernel.org/lpieralisi/pci/c/45514f78c6

Thanks,
Lorenzo