RE: [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@xxxxxxxxxx>
> Sent: Tuesday, July 7, 2026 2:23 PM
> To: Hongxing Zhu (OSS) <hongxing.zhu@xxxxxxxxxxx>
> Cc: Frank Li <frank.li@xxxxxxx>; smoch@xxxxxx; l.stach@xxxxxxxxxxxxxx;
> lpieralisi@xxxxxxxxxx; kwilczynski@xxxxxxxxxx; mani@xxxxxxxxxx;
> robh@xxxxxxxxxx; bhelgaas@xxxxxxxxxx; s.hauer@xxxxxxxxxxxxxx;
> kernel@xxxxxxxxxxxxxx; festevam@xxxxxxxxx; linux-pci@xxxxxxxxxxxxxxx;
> linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; imx@xxxxxxxxxxxxxxx; linux-
> kernel@xxxxxxxxxxxxxxx; Hongxing Zhu <hongxing.zhu@xxxxxxx>
> Subject: Re: [PATCH v1] PCI: imx6: Fix i.MX6Q/DL boot hang by separating PHY
> power and reference clock control
> 
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> 
> On Mon, Jul 06, 2026 at 11:06:29AM +0800, hongxing.zhu@xxxxxxxxxxx
> wrote:
> > From: Richard Zhu <hongxing.zhu@xxxxxxx>
> >
> > 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@xxxxxxxxx/
> 
> ?
Yes, it is like my test results.
Thanks for your reminder.

Best Regards
Richard Zhu
> 
> Thanks,
> Francesco