[PATCH v6 09/11] PCI: imx6: Add a new imx8mm_pcie_clkreq_override() for i.MX8M PCIes

[Frank Li]

On Wed, Oct 15, 2025 at 11:04:26AM +0800, Richard Zhu wrote:
> Add a new imx8mm_pcie_clkreq_override() for i.MX8M PCIes. Pave the path
> to support L1 PM Substates after clear CLKREQ# override. No function
> changes.
>
> Signed-off-by: Richard Zhu <hongxing.zhu at nxp.com>

Reviewed-by: Frank Li <Frank.Li at nxp.com>

> ---
>  drivers/pci/controller/dwc/pci-imx6.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index 4668fc9648bff..a60fe7c337e08 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -685,7 +685,7 @@ static int imx6q_pcie_enable_ref_clk(struct imx_pcie *imx_pcie, bool enable)
>  	return 0;
>  }
>
> -static int imx8mm_pcie_enable_ref_clk(struct imx_pcie *imx_pcie, bool enable)
> +static void imx8mm_pcie_clkreq_override(struct imx_pcie *imx_pcie, bool enable)
>  {
>  	int offset = imx_pcie_grp_offset(imx_pcie);
>
> @@ -695,6 +695,11 @@ static int imx8mm_pcie_enable_ref_clk(struct imx_pcie *imx_pcie, bool enable)
>  	regmap_update_bits(imx_pcie->iomuxc_gpr, offset,
>  			   IMX8MQ_GPR_PCIE_CLK_REQ_OVERRIDE_EN,
>  			   enable ? IMX8MQ_GPR_PCIE_CLK_REQ_OVERRIDE_EN : 0);
> +}
> +
> +static int imx8mm_pcie_enable_ref_clk(struct imx_pcie *imx_pcie, bool enable)
> +{
> +	imx8mm_pcie_clkreq_override(imx_pcie, enable);
>  	return 0;
>  }
>
> --
> 2.37.1
>