linux-kernel - [PATCH v5 0/3] PCI: imx6: Add external reference clock mode support

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Message-Id: <20250915035348.3252353-1-hongxing.zhu@nxp.com>
Date: Mon, 15 Sep 2025 11:53:45 +0800
From: Richard Zhu <hongxing.zhu@....com>
To: frank.li@....com,
	l.stach@...gutronix.de,
	lpieralisi@...nel.org,
	kwilczynski@...nel.org,
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Cc: linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
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Subject: [PATCH v5 0/3] PCI: imx6: Add external reference clock mode support

On i.MX, the PCIe reference clock might come from either internal system
PLL or external clock source. Add the external reference clock source
for reference clock.

Main change in v5:
- Update the commit message of first patch refer to Bejorn's comments.
- Correct the typo error and update the description of property in the
  first patch.

Main change in v4:
- Add one more reference clock "extref" to be onhalf the reference clock
  that comes from external crystal oscillator.
https://lore.kernel.org/imx/20250626073804.3113757-1-hongxing.zhu@nxp.com/

Main change in v3:
- Update the logic check external reference clock mode is enabled or
  not in the driver codes.
https://lore.kernel.org/imx/20250620031350.674442-1-hongxing.zhu@nxp.com/

Main change in v2:
- Fix yamllint warning.
- Refine the driver codes.
https://lore.kernel.org/imx/20250619091004.338419-1-hongxing.zhu@nxp.com/

[PATCH v5 1/3] dt-bindings: PCI: dwc: Add one more reference clock
[PATCH v5 2/3] dt-bindings: pci-imx6: Add external reference clock
[PATCH v5 3/3] PCI: imx6: Add external reference clock mode support

Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml      |  7 ++++++-
Documentation/devicetree/bindings/pci/snps,dw-pcie-common.yaml |  6 ++++++
drivers/pci/controller/dwc/pci-imx6.c                          | 20 +++++++++++++-------
3 files changed, 25 insertions(+), 8 deletions(-)