Re: [PATCH 2/3] phy: qcom: sgmii-eth: prepare for additional PHY modes

[Lorenzo Bianconi]

> Prepare the SGMII Ethernet PHY driver for PHY modes that require a
> different SerDes programming sequence. Move the SGMII readiness checks
> into a helper so additional modes can provide their own status checks,
> and select the initial interface mode through per-compatible match data
> rather than hardcoding SGMII during probe.
> 
> This does not change existing SA8775P behavior.
> 
> Signed-off-by: Mohd Ayaan Anwar <mohd.anwar@xxxxxxxxxxxxxxxx>

Hi Mohd,

just few nits inline. Fixing them:
Acked-by: Lorenzo Bianconi <lorenzo.bianconi@xxxxxxxxxxxxxxxx>

> ---
>  drivers/phy/qualcomm/phy-qcom-sgmii-eth.c | 70 ++++++++++++++++++++-----------
>  1 file changed, 46 insertions(+), 24 deletions(-)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-sgmii-eth.c b/drivers/phy/qualcomm/phy-qcom-sgmii-eth.c
> index 7137200c3f310a4d2642bb9bdbe3adb7589b2241..029dafacee7853648ef24afd0d9c4b83a549badf 100644
> --- a/drivers/phy/qualcomm/phy-qcom-sgmii-eth.c
> +++ b/drivers/phy/qualcomm/phy-qcom-sgmii-eth.c
> @@ -41,6 +41,10 @@ struct qcom_dwmac_sgmii_phy_data {
>  	phy_interface_t interface;
>  };
>  
> +struct qcom_dwmac_sgmii_phy_match_data {
> +	phy_interface_t default_interface;

nit: maybe better 'interface' instead of 'default_interface'?

> +};
> +
>  static void qcom_dwmac_sgmii_phy_init_1g(struct regmap *regmap)
>  {
>  	regmap_write(regmap, QSERDES_PCS + QPHY_PCS_SW_RESET, 0x01);
> @@ -227,47 +231,31 @@ qcom_dwmac_sgmii_phy_poll_status(struct regmap *regmap, unsigned int reg,
>  					val & bit, 1500, 750000);
>  }
>  
> -static int qcom_dwmac_sgmii_phy_calibrate(struct phy *phy)
> +static int qcom_dwmac_sgmii_phy_poll_sgmii_ready(struct device *dev,
> +						  struct regmap *regmap)

nit: can you please fix the alignement here?

>  {
> -	struct qcom_dwmac_sgmii_phy_data *data = phy_get_drvdata(phy);
> -	struct device *dev = phy->dev.parent;
> -
> -	switch (data->interface) {
> -	case PHY_INTERFACE_MODE_SGMII:
> -	case PHY_INTERFACE_MODE_1000BASEX:
> -		/* 1.25Gbps mode */
> -		qcom_dwmac_sgmii_phy_init_1g(data->regmap);
> -		break;
> -	case PHY_INTERFACE_MODE_2500BASEX:
> -		/* 3.125Gbps mode */
> -		qcom_dwmac_sgmii_phy_init_2p5g(data->regmap);
> -		break;
> -	default:
> -		return -EINVAL;
> -	}
> -
> -	if (qcom_dwmac_sgmii_phy_poll_status(data->regmap,
> +	if (qcom_dwmac_sgmii_phy_poll_status(regmap,
>  					     QSERDES_QMP_PLL + QSERDES_V5_COM_C_READY_STATUS,
>  					     QSERDES_COM_C_READY)) {
>  		dev_err(dev, "QSERDES_COM_C_READY_STATUS timed-out");
>  		return -ETIMEDOUT;
>  	}
>  
> -	if (qcom_dwmac_sgmii_phy_poll_status(data->regmap,
> +	if (qcom_dwmac_sgmii_phy_poll_status(regmap,
>  					     QSERDES_PCS + QPHY_PCS_PCS_READY_STATUS,
>  					     QSERDES_PCS_READY)) {
>  		dev_err(dev, "PCS_READY timed-out");
>  		return -ETIMEDOUT;
>  	}
>  
> -	if (qcom_dwmac_sgmii_phy_poll_status(data->regmap,
> +	if (qcom_dwmac_sgmii_phy_poll_status(regmap,
>  					     QSERDES_PCS + QPHY_PCS_PCS_READY_STATUS,
>  					     QSERDES_PCS_SGMIIPHY_READY)) {
>  		dev_err(dev, "SGMIIPHY_READY timed-out");
>  		return -ETIMEDOUT;
>  	}
>  
> -	if (qcom_dwmac_sgmii_phy_poll_status(data->regmap,
> +	if (qcom_dwmac_sgmii_phy_poll_status(regmap,
>  					     QSERDES_QMP_PLL + QSERDES_V5_COM_CMN_STATUS,
>  					     QSERDES_COM_C_PLL_LOCKED)) {
>  		dev_err(dev, "PLL Lock Status timed-out");
> @@ -277,6 +265,28 @@ static int qcom_dwmac_sgmii_phy_calibrate(struct phy *phy)
>  	return 0;
>  }
>  
> +static int qcom_dwmac_sgmii_phy_calibrate(struct phy *phy)
> +{
> +	struct qcom_dwmac_sgmii_phy_data *data = phy_get_drvdata(phy);
> +	struct device *dev = phy->dev.parent;
> +
> +	switch (data->interface) {
> +	case PHY_INTERFACE_MODE_SGMII:
> +	case PHY_INTERFACE_MODE_1000BASEX:
> +		/* 1.25Gbps mode */
> +		qcom_dwmac_sgmii_phy_init_1g(data->regmap);
> +		break;
> +	case PHY_INTERFACE_MODE_2500BASEX:
> +		/* 3.125Gbps mode */
> +		qcom_dwmac_sgmii_phy_init_2p5g(data->regmap);
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	return qcom_dwmac_sgmii_phy_poll_sgmii_ready(dev, data->regmap);
> +}
> +
>  static int qcom_dwmac_sgmii_phy_power_on(struct phy *phy)
>  {
>  	struct qcom_dwmac_sgmii_phy_data *data = phy_get_drvdata(phy);
> @@ -374,6 +384,7 @@ static const struct regmap_config qcom_dwmac_sgmii_phy_regmap_cfg = {
>  
>  static int qcom_dwmac_sgmii_phy_probe(struct platform_device *pdev)
>  {
> +	const struct qcom_dwmac_sgmii_phy_match_data *match_data;
>  	struct qcom_dwmac_sgmii_phy_data *data;
>  	struct device *dev = &pdev->dev;
>  	struct phy_provider *provider;
> @@ -385,7 +396,11 @@ static int qcom_dwmac_sgmii_phy_probe(struct platform_device *pdev)
>  	if (!data)
>  		return -ENOMEM;
>  
> -	data->interface = PHY_INTERFACE_MODE_SGMII;
> +	match_data = device_get_match_data(dev);
> +	if (!match_data)
> +		return -EINVAL;
> +
> +	data->interface = match_data->default_interface;
>  
>  	base = devm_platform_ioremap_resource(pdev, 0);
>  	if (IS_ERR(base))
> @@ -419,8 +434,15 @@ static int qcom_dwmac_sgmii_phy_probe(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +static const struct qcom_dwmac_sgmii_phy_match_data sa8775p_match_data = {
> +	.default_interface = PHY_INTERFACE_MODE_SGMII,
> +};
> +
>  static const struct of_device_id qcom_dwmac_sgmii_phy_of_match[] = {
> -	{ .compatible = "qcom,sa8775p-dwmac-sgmii-phy" },
> +	{
> +		.compatible = "qcom,sa8775p-dwmac-sgmii-phy",
> +		.data = &sa8775p_match_data,
> +	},
>  	{ },
>  };
>  MODULE_DEVICE_TABLE(of, qcom_dwmac_sgmii_phy_of_match);
> 
> -- 
> 2.34.1
>

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