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Date:   Wed, 10 Aug 2022 21:54:47 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     wei.fang@....com, andrew@...n.ch, linux@...linux.org.uk,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netdev@...r.kernel.org
Cc:     xiaoning.wang@....com
Subject: Re: [PATCH net-next] net: phy: realtek: add support for
 RTL8821F(D)(I)-VD-CG

On 10.08.2022 19:37, wei.fang@....com wrote:
> From: Clark Wang <xiaoning.wang@....com>
> 
> RTL8821F(D)(I)-VD-CG is the pin-to-pin upgrade chip from
> RTL8821F(D)(I)-CG.
> 

Don't you mean 8211 instead of 8821 here?

> Add new PHY ID for this chip.
> It does not support RTL8211F_PHYCR2 anymore, so remove the w/r operation
> of this register.
> 
> Signed-off-by: Clark Wang <xiaoning.wang@....com>
> ---
>  drivers/net/phy/realtek.c | 48 +++++++++++++++++++++++++++++----------
>  1 file changed, 36 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
> index a5671ab896b3..bfde22dc85f5 100644
> --- a/drivers/net/phy/realtek.c
> +++ b/drivers/net/phy/realtek.c
> @@ -70,6 +70,7 @@
>  #define RTLGEN_SPEED_MASK			0x0630
>  
>  #define RTL_GENERIC_PHYID			0x001cc800
> +#define RTL_8211FVD_PHYID			0x001cc878
>  
>  MODULE_DESCRIPTION("Realtek PHY driver");
>  MODULE_AUTHOR("Johnson Leung");
> @@ -80,6 +81,11 @@ struct rtl821x_priv {
>  	u16 phycr2;
>  };
>  
> +static bool is_rtl8211fvd(u32 phy_id)

Better add a has_phycr2 to struct rtl821x_priv. Then you have:

if (priv->has_phycr2)
	do_something_with(priv->phycr2);

> +{
> +	return phy_id == RTL_8211FVD_PHYID;
> +}
> +
>  static int rtl821x_read_page(struct phy_device *phydev)
>  {
>  	return __phy_read(phydev, RTL821x_PAGE_SELECT);
> @@ -94,6 +100,7 @@ static int rtl821x_probe(struct phy_device *phydev)
>  {
>  	struct device *dev = &phydev->mdio.dev;
>  	struct rtl821x_priv *priv;
> +	u32 phy_id = phydev->drv->phy_id;
>  	int ret;
>  
>  	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> @@ -108,13 +115,15 @@ static int rtl821x_probe(struct phy_device *phydev)
>  	if (of_property_read_bool(dev->of_node, "realtek,aldps-enable"))
>  		priv->phycr1 |= RTL8211F_ALDPS_PLL_OFF | RTL8211F_ALDPS_ENABLE | RTL8211F_ALDPS_XTAL_OFF;
>  
> -	ret = phy_read_paged(phydev, 0xa43, RTL8211F_PHYCR2);
> -	if (ret < 0)
> -		return ret;
> +	if (!is_rtl8211fvd(phy_id)) {
> +		ret = phy_read_paged(phydev, 0xa43, RTL8211F_PHYCR2);
> +		if (ret < 0)
> +			return ret;
>  
> -	priv->phycr2 = ret & RTL8211F_CLKOUT_EN;
> -	if (of_property_read_bool(dev->of_node, "realtek,clkout-disable"))
> -		priv->phycr2 &= ~RTL8211F_CLKOUT_EN;
> +		priv->phycr2 = ret & RTL8211F_CLKOUT_EN;
> +		if (of_property_read_bool(dev->of_node, "realtek,clkout-disable"))
> +			priv->phycr2 &= ~RTL8211F_CLKOUT_EN;
> +	}
>  
>  	phydev->priv = priv;
>  
> @@ -333,6 +342,7 @@ static int rtl8211f_config_init(struct phy_device *phydev)
>  {
>  	struct rtl821x_priv *priv = phydev->priv;
>  	struct device *dev = &phydev->mdio.dev;
> +	u32 phy_id = phydev->drv->phy_id;
>  	u16 val_txdly, val_rxdly;
>  	int ret;
>  
> @@ -400,12 +410,14 @@ static int rtl8211f_config_init(struct phy_device *phydev)
>  			val_rxdly ? "enabled" : "disabled");
>  	}
>  
> -	ret = phy_modify_paged(phydev, 0xa43, RTL8211F_PHYCR2,
> -			       RTL8211F_CLKOUT_EN, priv->phycr2);
> -	if (ret < 0) {
> -		dev_err(dev, "clkout configuration failed: %pe\n",
> -			ERR_PTR(ret));
> -		return ret;
> +	if (!is_rtl8211fvd(phy_id)) {
> +		ret = phy_modify_paged(phydev, 0xa43, RTL8211F_PHYCR2,
> +				       RTL8211F_CLKOUT_EN, priv->phycr2);
> +		if (ret < 0) {
> +			dev_err(dev, "clkout configuration failed: %pe\n",
> +				ERR_PTR(ret));
> +			return ret;
> +		}
>  	}
>  
>  	return genphy_soft_reset(phydev);
> @@ -923,6 +935,18 @@ static struct phy_driver realtek_drvs[] = {
>  		.resume		= rtl821x_resume,
>  		.read_page	= rtl821x_read_page,
>  		.write_page	= rtl821x_write_page,
> +	}, {
> +		PHY_ID_MATCH_EXACT(RTL_8211FVD_PHYID),
> +		.name		= "RTL8211F-VD Gigabit Ethernet",
> +		.probe		= rtl821x_probe,
> +		.config_init	= &rtl8211f_config_init,
> +		.read_status	= rtlgen_read_status,
> +		.config_intr	= &rtl8211f_config_intr,
> +		.handle_interrupt = rtl8211f_handle_interrupt,
> +		.suspend	= genphy_suspend,
> +		.resume		= rtl821x_resume,
> +		.read_page	= rtl821x_read_page,
> +		.write_page	= rtl821x_write_page,
>  	}, {
>  		.name		= "Generic FE-GE Realtek PHY",
>  		.match_phy_device = rtlgen_match_phy_device,

And by the way, net-next is closed currently.

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