linux-kernel - Re: [PATCH] PCI: qcom: Remove ddrss_sf

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Date:   Tue, 19 Apr 2022 21:06:27 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Stanimir Varbanov <svarbanov@...sol.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: qcom: Remove ddrss_sf_tbu clock from sc8180x

On Thu, 31 Mar 2022 at 04:31, Bjorn Andersson
<bjorn.andersson@...aro.org> wrote:
>
> The Qualcomm SC8180X platform was piggy backing on the SM8250
> qcom_pcie_cfg, but the platform doesn't have the ddrss_sf_tbu clock, so
> it now fails to probe due to the missing clock.
>
> Give SC8180X its own qcom_pcie_cfg, without the ddrss_sf_tbu flag set.
>
> Fixes: 0614f98bbb9f ("PCI: qcom: Add ddrss_sf_tbu flag")
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

> ---
>  drivers/pci/controller/dwc/pcie-qcom.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index 6ab90891801d..816028c0f6ed 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -1550,6 +1550,11 @@ static const struct qcom_pcie_cfg sc7280_cfg = {
>         .pipe_clk_need_muxing = true,
>  };
>
> +static const struct qcom_pcie_cfg sc8180x_cfg = {
> +       .ops = &ops_1_9_0,
> +       .has_tbu_clk = true,
> +};
> +
>  static const struct dw_pcie_ops dw_pcie_ops = {
>         .link_up = qcom_pcie_link_up,
>         .start_link = qcom_pcie_start_link,
> @@ -1656,7 +1661,7 @@ static const struct of_device_id qcom_pcie_match[] = {
>         { .compatible = "qcom,pcie-qcs404", .data = &ipq4019_cfg },
>         { .compatible = "qcom,pcie-sdm845", .data = &sdm845_cfg },
>         { .compatible = "qcom,pcie-sm8250", .data = &sm8250_cfg },
> -       { .compatible = "qcom,pcie-sc8180x", .data = &sm8250_cfg },
> +       { .compatible = "qcom,pcie-sc8180x", .data = &sc8180x_cfg },
>         { .compatible = "qcom,pcie-sm8450-pcie0", .data = &sm8450_pcie0_cfg },
>         { .compatible = "qcom,pcie-sm8450-pcie1", .data = &sm8450_pcie1_cfg },
>         { .compatible = "qcom,pcie-sc7280", .data = &sc7280_cfg },
> --
> 2.35.1
>


-- 
With best wishes
Dmitry