linux-kernel - Re: [PATCH net-next v2 8/9] net: ethernet: mtk-star-emac: add support for MII interface

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Message-ID: <cef66664-192c-ab2f-2a3c-18c5d48b5093@mediatek.com>
Date:   Thu, 27 Jan 2022 10:17:18 +0800
From:   Macpaul Lin <macpaul.lin@...iatek.com>
To:     Biao Huang <biao.huang@...iatek.com>,
        David Miller <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        "Fabien Parent" <fparent@...libre.com>
CC:     Jakub Kicinski <kuba@...nel.org>, Felix Fietkau <nbd@....name>,
        "John Crispin" <john@...ozen.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Mark Lee <Mark-MC.Lee@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        Yinghua Pan <ot_yinghua.pan@...iatek.com>,
        <srv_heupstream@...iatek.com>
Subject: Re: [PATCH net-next v2 8/9] net: ethernet: mtk-star-emac: add support
 for MII interface

On 1/27/22 9:58 AM, Biao Huang wrote:
> Add support for MII interface.
> If user wants to use MII, assign "MII" to "phy-mode" property in dts.
> 
> Signed-off-by: Biao Huang <biao.huang@...iatek.com>
> Signed-off-by: Yinghua Pan <ot_yinghua.pan@...iatek.com>
> ---
>   drivers/net/ethernet/mediatek/mtk_star_emac.c | 13 +++++++++++--
>   1 file changed, 11 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/mediatek/mtk_star_emac.c b/drivers/net/ethernet/mediatek/mtk_star_emac.c
> index d5e974e0db6d..167a019fd8f5 100644
> --- a/drivers/net/ethernet/mediatek/mtk_star_emac.c
> +++ b/drivers/net/ethernet/mediatek/mtk_star_emac.c
> @@ -193,6 +193,7 @@ static const char *const mtk_star_clk_names[] = { "core", "reg", "trans" };
>   #define MTK_PERICFG_REG_NIC_CFG1_CON		0x03c8
>   #define MTK_PERICFG_REG_NIC_CFG_CON_V2		0x0c10
>   #define MTK_PERICFG_REG_NIC_CFG_CON_CFG_INTF	GENMASK(3, 0)
> +#define MTK_PERICFG_BIT_NIC_CFG_CON_MII		0
>   #define MTK_PERICFG_BIT_NIC_CFG_CON_RMII	1
>   #define MTK_PERICFG_BIT_NIC_CFG_CON_CLK		BIT(0)
>   #define MTK_PERICFG_BIT_NIC_CFG_CON_CLK_V2	BIT(8)
> @@ -1463,6 +1464,7 @@ static int mtk_star_set_timing(struct mtk_star_priv *priv)
>   	unsigned int delay_val = 0;
>   
>   	switch (priv->phy_intf) {
> +	case PHY_INTERFACE_MODE_MII:
>   	case PHY_INTERFACE_MODE_RMII:
>   		delay_val |= FIELD_PREP(MTK_STAR_BIT_INV_RX_CLK, priv->rx_inv);
>   		delay_val |= FIELD_PREP(MTK_STAR_BIT_INV_TX_CLK, priv->tx_inv);
> @@ -1545,7 +1547,8 @@ static int mtk_star_probe(struct platform_device *pdev)
>   	ret = of_get_phy_mode(of_node, &priv->phy_intf);
>   	if (ret) {
>   		return ret;
> -	} else if (priv->phy_intf != PHY_INTERFACE_MODE_RMII) {
> +	} else if (priv->phy_intf != PHY_INTERFACE_MODE_RMII &&
> +		   priv->phy_intf != PHY_INTERFACE_MODE_MII) {
>   		dev_err(dev, "unsupported phy mode: %s\n",
>   			phy_modes(priv->phy_intf));
>   		return -EINVAL;
> @@ -1610,9 +1613,12 @@ static int mt8516_set_interface_mode(struct net_device *ndev)
>   {
>   	struct mtk_star_priv *priv = netdev_priv(ndev);
>   	struct device *dev = mtk_star_get_dev(priv);
> -	unsigned int intf_val, ret, rmii_rxc;
> +	unsigned int intf_val, ret, rmii_rxc = 0;
>   
>   	switch (priv->phy_intf) {
> +	case PHY_INTERFACE_MODE_MII:
> +		intf_val = MTK_PERICFG_BIT_NIC_CFG_CON_MII;
> +		break;
>   	case PHY_INTERFACE_MODE_RMII:
>   		intf_val = MTK_PERICFG_BIT_NIC_CFG_CON_RMII;
>   		rmii_rxc = priv->rmii_rxc ? 0 : MTK_PERICFG_BIT_NIC_CFG_CON_CLK;
> @@ -1642,6 +1648,9 @@ static int mt8365_set_interface_mode(struct net_device *ndev)
>   	unsigned int intf_val;
>   
>   	switch (priv->phy_intf) {
> +	case PHY_INTERFACE_MODE_MII:
> +		intf_val = MTK_PERICFG_BIT_NIC_CFG_CON_MII;
> +		break;
>   	case PHY_INTERFACE_MODE_RMII:
>   		intf_val = MTK_PERICFG_BIT_NIC_CFG_CON_RMII;
>   		intf_val |= priv->rmii_rxc ? 0 : MTK_PERICFG_BIT_NIC_CFG_CON_CLK_V2;
> 

Reviewed-by: Macpaul Lin <macpaul.lin@...iatek.com>

Regards,
Macpaul Lin