linux-kernel - Re: [PATCH 06/10] phy: qcom: ipq5332: Add support for g3x1 and g3x2 PCIe PHYs

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Message-ID: <CAA8EJppSXeV9LSv8VAwYSP9nDzq+uHTvbiEzD4PebEHoOJySNg@mail.gmail.com>
Date:   Thu, 14 Dec 2023 09:12:08 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Praveenkumar I <quic_ipkumar@...cinc.com>
Cc:     agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        mturquette@...libre.com, sboyd@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        bhelgaas@...gle.com, lpieralisi@...nel.org, kw@...ux.com,
        vkoul@...nel.org, kishon@...nel.org, mani@...nel.org,
        quic_nsekar@...cinc.com, quic_srichara@...cinc.com,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-phy@...ts.infradead.org,
        quic_varada@...cinc.com, quic_devipriy@...cinc.com,
        quic_kathirav@...cinc.com, quic_anusha@...cinc.com
Subject: Re: [PATCH 06/10] phy: qcom: ipq5332: Add support for g3x1 and g3x2
 PCIe PHYs

On Thu, 14 Dec 2023 at 08:30, Praveenkumar I <quic_ipkumar@...cinc.com> wrote:
>
> Add support for single-lane and dual-lane PCIe UNIPHY found on
> Qualcomm IPQ5332 platform. This UNIPHY is similar to the one
> present in Qualcomm IPQ5018.
>
> Signed-off-by: Praveenkumar I <quic_ipkumar@...cinc.com>
> ---
> This patch depends on the below series which adds PCIe support in
> Qualcomm IPQ5018
> https://lore.kernel.org/all/20231003120846.28626-1-quic_nsekar@quicinc.com/
>
>  .../phy/qualcomm/phy-qcom-uniphy-pcie-28lp.c  | 44 +++++++++++++++++++
>  1 file changed, 44 insertions(+)
>
> diff --git a/drivers/phy/qualcomm/phy-qcom-uniphy-pcie-28lp.c b/drivers/phy/qualcomm/phy-qcom-uniphy-pcie-28lp.c
> index 9f9a03faf6fa..aa71b85eb50e 100644
> --- a/drivers/phy/qualcomm/phy-qcom-uniphy-pcie-28lp.c
> +++ b/drivers/phy/qualcomm/phy-qcom-uniphy-pcie-28lp.c
> @@ -34,6 +34,10 @@
>  #define SSCG_CTRL_REG_6                0xb0
>  #define PCS_INTERNAL_CONTROL_2 0x2d8
>
> +#define PHY_CFG_PLLCFG                         0x220
> +#define PHY_CFG_EIOS_DTCT_REG                  0x3e4
> +#define PHY_CFG_GEN3_ALIGN_HOLDOFF_TIME                0x3e8
> +
>  #define PHY_MODE_FIXED         0x1
>
>  enum qcom_uniphy_pcie_type {
> @@ -112,6 +116,21 @@ static const struct uniphy_regs ipq5018_regs[] = {
>         },
>  };
>
> +static const struct uniphy_regs ipq5332_regs[] = {
> +       {
> +               .offset = PHY_CFG_PLLCFG,
> +               .val = 0x30,
> +       },
> +       {
> +               .offset = PHY_CFG_EIOS_DTCT_REG,
> +               .val = 0x53ef,
> +       },
> +       {
> +               .offset = PHY_CFG_GEN3_ALIGN_HOLDOFF_TIME,
> +               .val = 0xCf,
> +       },
> +};
> +
>  static const struct uniphy_pcie_data ipq5018_2x2_data = {
>         .lanes          = 2,
>         .lane_offset    = 0x800,
> @@ -121,6 +140,23 @@ static const struct uniphy_pcie_data ipq5018_2x2_data = {
>         .pipe_clk_rate  = 125000000,
>  };
>
> +static const struct uniphy_pcie_data ipq5332_x2_data = {
> +       .lanes          = 2,
> +       .lane_offset    = 0x800,
> +       .phy_type       = PHY_TYPE_PCIE_GEN3,
> +       .init_seq       = ipq5332_regs,
> +       .init_seq_num   = ARRAY_SIZE(ipq5332_regs),
> +       .pipe_clk_rate  = 250000000,
> +};
> +
> +static const struct uniphy_pcie_data ipq5332_x1_data = {
> +       .lanes          = 1,
> +       .phy_type       = PHY_TYPE_PCIE_GEN3,
> +       .init_seq       = ipq5332_regs,
> +       .init_seq_num   = ARRAY_SIZE(ipq5332_regs),
> +       .pipe_clk_rate  = 250000000,
> +};

Please keep structs sorted out.

> +
>  static void qcom_uniphy_pcie_init(struct qcom_uniphy_pcie *phy)
>  {
>         const struct uniphy_pcie_data *data = phy->data;
> @@ -270,6 +306,14 @@ static const struct of_device_id qcom_uniphy_pcie_id_table[] = {
>                 .compatible = "qcom,ipq5018-uniphy-pcie-gen2x2",
>                 .data = &ipq5018_2x2_data,
>         },
> +       {
> +               .compatible = "qcom,ipq5332-uniphy-pcie-gen3x2",
> +               .data = &ipq5332_x2_data,
> +       },
> +       {
> +               .compatible = "qcom,ipq5332-uniphy-pcie-gen3x1",
> +               .data = &ipq5332_x1_data,

The entries here should be sorted out.

> +       },
>         { /* Sentinel */ },
>  };
>  MODULE_DEVICE_TABLE(of, qcom_uniphy_pcie_id_table);
> --
> 2.34.1
>
>


-- 
With best wishes
Dmitry