netdev - Re: [PATCH v2 3/4] net: stmmac: Add glue layer for Loongson-1 SoC

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Date: Tue, 22 Aug 2023 17:47:38 +0800
From: Keguang Zhang <keguang.zhang@...il.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: netdev@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Lee Jones <lee@...nel.org>, Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	"David S . Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>, Giuseppe Cavallaro <peppe.cavallaro@...com>, 
	Alexandre Torgue <alexandre.torgue@...s.st.com>, Jose Abreu <joabreu@...opsys.com>, 
	Serge Semin <Sergey.Semin@...kalelectronics.ru>
Subject: Re: [PATCH v2 3/4] net: stmmac: Add glue layer for Loongson-1 SoC

On Mon, Aug 21, 2023 at 3:04 AM Andrew Lunn <andrew@...n.ch> wrote:
>
> > +static int ls1b_dwmac_syscon_init(struct plat_stmmacenet_data *plat)
> > +{
> > +     struct ls1x_dwmac *dwmac = plat->bsp_priv;
> > +     struct regmap_field **regmap_fields = dwmac->regmap_fields;
> > +
> > +     if (plat->bus_id) {
> > +             regmap_field_write(regmap_fields[GMAC1_USE_UART1], 1);
> > +             regmap_field_write(regmap_fields[GMAC1_USE_UART0], 1);
> > +
> > +             switch (plat->phy_interface) {
> > +             case PHY_INTERFACE_MODE_RGMII:
> > +                     regmap_field_write(regmap_fields[GMAC1_USE_TXCLK], 0);
> > +                     regmap_field_write(regmap_fields[GMAC1_USE_PWM23], 0);
> > +                     break;
>
> What about the other three RGMII modes? Plain rgmii is pretty unusual,
> rgmii-id is the most used.
>
According to the LS1B datasheet, only RGMII and MII are supported.
And I can confirm that MII mode does work for LS1B.

> > +             case PHY_INTERFACE_MODE_MII:
> > +                     regmap_field_write(regmap_fields[GMAC1_USE_TXCLK], 1);
> > +                     regmap_field_write(regmap_fields[GMAC1_USE_PWM23], 1);
> > +                     break;
> > +             default:
> > +                     dev_err(dwmac->dev, "Unsupported PHY mode %u\n",
> > +                             plat->phy_interface);
> > +                     return -EOPNOTSUPP;
> > +             }
> > +
> > +             regmap_field_write(regmap_fields[GMAC1_SHUT], 0);
> > +     } else {
> > +             switch (plat->phy_interface) {
> > +             case PHY_INTERFACE_MODE_RGMII:
> > +                     regmap_field_write(regmap_fields[GMAC0_USE_TXCLK], 0);
> > +                     regmap_field_write(regmap_fields[GMAC0_USE_PWM01], 0);
> > +                     break;
>
> same here.
>
>      Andrew



-- 
Best regards,

Keguang Zhang