netdev - Re: [net-next PATCH v12 4/4] net: dsa: mv88e6xxx: Add support for mv88e6393x family of Marvell

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Date:   Tue, 5 Jan 2021 13:15:00 +0100
From:   Marek Behún <kabel@...nel.org>
To:     Pavana Sharma <pavana.sharma@...i.com>
Cc:     kuba@...nel.org, andrew@...n.ch, ashkan.boldaji@...i.com,
        clang-built-linux@...glegroups.com, davem@...emloft.net,
        devicetree@...r.kernel.org, f.fainelli@...il.com,
        gregkh@...uxfoundation.org, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, lkp@...el.com,
        netdev@...r.kernel.org, robh+dt@...nel.org,
        vivien.didelot@...il.com
Subject: Re: [net-next PATCH v12 4/4] net: dsa: mv88e6xxx: Add support for
 mv88e6393x  family of Marvell

On Fri, 11 Dec 2020 22:51:01 +1000
Pavana Sharma <pavana.sharma@...i.com> wrote:

> +int mv88e6393x_serdes_irq_enable(struct mv88e6xxx_chip *chip, int port,
> +				int lane, bool enable)
> +{
> +	u8 cmode = chip->ports[port].cmode;
> +	int err = 0;
> +
> +	switch (cmode) {
> +	case MV88E6XXX_PORT_STS_CMODE_SGMII:
> +	case MV88E6XXX_PORT_STS_CMODE_1000BASEX:
> +	case MV88E6XXX_PORT_STS_CMODE_2500BASEX:
> +	case MV88E6XXX_PORT_STS_CMODE_5GBASER:
> +	case MV88E6XXX_PORT_STS_CMODE_10GBASER:
> +		err = mv88e6390_serdes_irq_enable_sgmii(chip, lane, enable);
> +	}

This is wrong. IRQ for 5gbase-r and 10gbase-r is enabled differently.
Please look at how I did it in my proposal
https://www.mail-archive.com/netdev@vger.kernel.org/msg347854.html
Please look at the following functions in that patch:

   mv88e6393x_serdes_irq_enable_10g()
   mv88e6393x_serdes_irq_enable()
   mv88e6393x_serdes_irq_status_10g()
   irqreturn_t mv88e6393x_serdes_irq_status()

and also at the constants added to serdes.h in that patch

#define MV88E6393X_10G_INT_ENABLE      0x9000
#define MV88E6393X_10G_INT_LINK_CHANGE BIT(2)
#define MV88E6393X_10G_INT_STATUS      0x9001