Re: [PATCH v6 03/10] PCI: imx6: Fetch dbi2 and iATU base addesses from DT

Manivannan Sadhasivam
2024-11-15T06:41:17Z

On Fri, Nov 01, 2024 at 03:06:03PM +0800, Richard Zhu wrote:
> Since dbi2 and atu regs are added for i.MX8M PCIes. Fetch the dbi2 and
> iATU base addresses from DT directly, and remove the useless codes.
>

It'd be useful to mention where the base addresses were extraced. Like by the
DWC common driver.

> Upsteam dts's have not enabled EP function. So no function broken for
> old upsteam's dtb.
>
> Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

- Mani

> ---
> drivers/pci/controller/dwc/pci-imx6.c | 20 --------------------
> 1 file changed, 20 deletions(-)
>
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index bc8567677a67..462decd1d589 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -1115,7 +1115,6 @@ static int imx_add_pcie_ep(struct imx_pcie *imx_pcie,
> struct platform_device *pdev)
> {
> int ret;
> - unsigned int pcie_dbi2_offset;
> struct dw_pcie_ep *ep;
> struct dw_pcie *pci = imx_pcie->pci;
> struct dw_pcie_rp *pp = &pci->pp;
> @@ -1125,25 +1124,6 @@ static int imx_add_pcie_ep(struct imx_pcie *imx_pcie,
> ep = &pci->ep;
> ep->ops = &pcie_ep_ops;
>
> - switch (imx_pcie->drvdata->variant) {
> - case IMX8MQ_EP:
> - case IMX8MM_EP:
> - case IMX8MP_EP:
> - pcie_dbi2_offset = SZ_1M;
> - break;
> - default:
> - pcie_dbi2_offset = SZ_4K;
> - break;
> - }
> -
> - pci->dbi_base2 = pci->dbi_base + pcie_dbi2_offset;
> -
> - /*
> - * FIXME: Ideally, dbi2 base address should come from DT. But since only IMX95 is defining
> - * "dbi2" in DT, "dbi_base2" is set to NULL here for that platform alone so that the DWC
> - * core code can fetch that from DT. But once all platform DTs were fixed, this and the
> - * above "dbi_base2" setting should be removed.
> - */
> if (device_property_match_string(dev, "reg-names", "dbi2") >= 0)
> pci->dbi_base2 = NULL;
>
> --
> 2.37.1
>

--
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