PCI: imx6: Configure REF_USE_PAD before PHY reset for i.MX95

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According to the i.MX95 PCIe PHY Databook, the ref_use_pad signal in the
Common Block Signals section selects the reference clock source connected
to the PHY pads. Per the specification, any change to this input must be
followed by a PHY reset assertion to take effect.

Move the REF_USE_PAD configuration before the PHY reset toggle to comply
with the required initialization sequence.

Fixes: 47f54a902d ("PCI: imx6: Toggle the core reset for i.MX95 PCIe")
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
[mani: renamed the callback and helper to match the usecase]
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260518072715.3166514-2-hongxing.zhu@nxp.com

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Richard Zhu 2026-05-18 15:27:14 +08:00 • committed by Manivannan Sadhasivam

parent 250eea5c06

commit 0c26b1c34d

1 changed files with 24 additions and 3 deletions

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drivers/pci/controller/dwc/pci-imx6.c

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