linux-kernel - Re: [PATCH v2 5/7] PCI: qcom: Add SM8150 SoC support

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Date:   Wed, 2 Mar 2022 17:49:09 +0530
From:   Bhupesh Sharma <bhupesh.sharma@...aro.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, bhupesh.linux@...il.com,
        lorenzo.pieralisi@....com, agross@...nel.org,
        bjorn.andersson@...aro.org, svarbanov@...sol.com,
        bhelgaas@...gle.com, linux-kernel@...r.kernel.org,
        robh+dt@...nel.org, sboyd@...nel.org, mturquette@...libre.com,
        linux-clk@...r.kernel.org, Vinod Koul <vkoul@...nel.org>
Subject: Re: [PATCH v2 5/7] PCI: qcom: Add SM8150 SoC support

Hi Dmitry,

On Tue, 1 Mar 2022 at 17:13, Dmitry Baryshkov
<dmitry.baryshkov@...aro.org> wrote:
>
> On 01/03/2022 10:25, Bhupesh Sharma wrote:
> > The PCIe IP (rev 1.5.0) on SM8150 SoC is similar to the one used on
> > SM8250. Hence the support is added reusing the members of ops_2_7_0.
> >
> > Cc: Vinod Koul <vkoul@...nel.org>
> > Cc: Rob Herring <robh+dt@...nel.org>
> > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> > Signed-off-by: Bhupesh Sharma <bhupesh.sharma@...aro.org>
> > ---
> >   drivers/pci/controller/dwc/pcie-qcom.c | 16 ++++++++++++++++
> >   1 file changed, 16 insertions(+)
> >
> > diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> > index c19cd506ed3f..66fbc0234888 100644
> > --- a/drivers/pci/controller/dwc/pcie-qcom.c
> > +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> > @@ -1487,6 +1487,17 @@ static const struct qcom_pcie_ops ops_1_9_0 = {
> >       .config_sid = qcom_pcie_config_sid_sm8250,
> >   };
> >
> > +/* Qcom IP rev.: 1.5.0 */
> > +static const struct qcom_pcie_ops ops_1_5_0 = {
> > +     .get_resources = qcom_pcie_get_resources_2_7_0,
> > +     .init = qcom_pcie_init_2_7_0,
> > +     .deinit = qcom_pcie_deinit_2_7_0,
> > +     .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
> > +     .post_init = qcom_pcie_post_init_2_7_0,
> > +     .post_deinit = qcom_pcie_post_deinit_2_7_0,
> > +     .config_sid = qcom_pcie_config_sid_sm8250,
> > +};
> > +
>
> This duplicates the ops_1_9_0, doesn't it?
> I'd suggest to reuse 1.9.0 structure and add a comment that it's also
> used for 1.5.0.

Ack. I will fix this in v3.

Regards,
Bhupesh

> >   static const struct qcom_pcie_cfg apq8084_cfg = {
> >       .ops = &ops_1_0_0,
> >   };
> > @@ -1511,6 +1522,10 @@ static const struct qcom_pcie_cfg sdm845_cfg = {
> >       .ops = &ops_2_7_0,
> >   };
> >
> > +static const struct qcom_pcie_cfg sm8150_cfg = {
> > +     .ops = &ops_1_5_0,
> > +};
> > +
> >   static const struct qcom_pcie_cfg sm8250_cfg = {
> >       .ops = &ops_1_9_0,
> >   };
> > @@ -1626,6 +1641,7 @@ static const struct of_device_id qcom_pcie_match[] = {
> >       { .compatible = "qcom,pcie-ipq4019", .data = &ipq4019_cfg },
> >       { .compatible = "qcom,pcie-qcs404", .data = &ipq4019_cfg },
> >       { .compatible = "qcom,pcie-sdm845", .data = &sdm845_cfg },
> > +     { .compatible = "qcom,pcie-sm8150", .data = &sm8150_cfg },
> >       { .compatible = "qcom,pcie-sm8250", .data = &sm8250_cfg },
> >       { .compatible = "qcom,pcie-sc8180x", .data = &sm8250_cfg },
> >       { .compatible = "qcom,pcie-sc7280", .data = &sc7280_cfg },
>
>
> --
> With best wishes
> Dmitry