[PATCH v1] PCI: imx6: Fix i.MX6Q/DL boot hang by separating PHY power and reference clock control

[Hongxing Zhu (OSS)]

> -----Original Message-----
> From: Francesco Dolcini <francesco at dolcini.it>
> Sent: Tuesday, July 7, 2026 2:23 PM
> To: Hongxing Zhu (OSS) <hongxing.zhu at oss.nxp.com>
> Cc: Frank Li <frank.li at nxp.com>; smoch at web.de; l.stach at pengutronix.de;
> lpieralisi at kernel.org; kwilczynski at kernel.org; mani at kernel.org;
> robh at kernel.org; bhelgaas at google.com; s.hauer at pengutronix.de;
> kernel at pengutronix.de; festevam at gmail.com; linux-pci at vger.kernel.org;
> linux-arm-kernel at lists.infradead.org; imx at lists.linux.dev; linux-
> kernel at vger.kernel.org; Hongxing Zhu <hongxing.zhu at nxp.com>
> Subject: Re: [PATCH v1] PCI: imx6: Fix i.MX6Q/DL boot hang by separating PHY
> power and reference clock control
> 
> [You don't often get email from francesco at dolcini.it. Learn why this is
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> 
> On Mon, Jul 06, 2026 at 11:06:29AM +0800, hongxing.zhu at oss.nxp.com
> wrote:
> > From: Richard Zhu <hongxing.zhu at nxp.com>
> >
> > Commit 610fa91d9863 ("PCI: imx6: Assert PERST# before enabling
> > regulators") introduced a boot hang on i.MX6Q/DL variants by changing
> > the initialization sequence.
> 
> Is this related to
> 
> https://lore.kernel.org/all/20260629143439.361560-1-
> leoreis.costa at gmail.com/
> 
> ?
Yes, it is like my test results.
Thanks for your reminder.

Best Regards
Richard Zhu
> 
> Thanks,
> Francesco