linux-kernel - Re: [PATCH] net: dsa: add missing phy address offset

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Message-ID: <d4e6e37b-01c2-3141-8e30-b7e8c252c0ef@gmail.com>
Date:   Wed, 20 Feb 2019 11:27:16 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Marcel Reichmuth <Marcel.Reichmuth@...module.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Cc:     "andrew@...n.ch" <andrew@...n.ch>,
        "vivien.didelot@...il.com" <vivien.didelot@...il.com>,
        "davem@...emloft.net" <davem@...emloft.net>
Subject: Re: [PATCH] net: dsa: add missing phy address offset

On 2/20/19 10:15 AM, Marcel Reichmuth wrote:
> When phys do not start at address 0 like on the mv88e6341 the wrong
> phy address is used and therefore the slave ports can not be
> initialized. This patch adds the proper offset to the phy address.
> 
> Signed-off-by: Marcel Reichmuth <marcel.reichmuth@...module.com>

You are supposed to describe the port to PHY mapping using the binding,
so for instance:

ports {
	port@0 {
		reg = <0>;
		phy-handle = <&phy1>;
	};

};

mdio {
	phy1: phy@1 {
		reg = <1>;
	};
};

etc. is not that working for you?

> ---
>  drivers/net/dsa/mv88e6xxx/chip.c | 3 +++
>  include/net/dsa.h                | 1 +
>  net/dsa/slave.c                  | 3 ++-
>  3 files changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
> index 12fd7ce3f1ff..0ca649f784d2 100644
> --- a/drivers/net/dsa/mv88e6xxx/chip.c
> +++ b/drivers/net/dsa/mv88e6xxx/chip.c
> @@ -2198,12 +2198,15 @@ static int mv88e6xxx_setup_upstream_port(struct mv88e6xxx_chip *chip, int port)
>  static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
>  {
>  	struct dsa_switch *ds = chip->ds;
> +	struct dsa_port *dp = &ds->ports[port];
>  	int err;
>  	u16 reg;
>  
>  	chip->ports[port].chip = chip;
>  	chip->ports[port].port = port;
>  
> +	dp->phy_base_addr = chip->info->phy_base_addr;
> +
>  	/* MAC Forcing register: don't force link, speed, duplex or flow control
>  	 * state to any particular values on physical ports, but force the CPU
>  	 * port and all DSA ports to their maximum bandwidth and full duplex.
> diff --git a/include/net/dsa.h b/include/net/dsa.h
> index b3eefe8e18fd..f9c9dc1f6d21 100644
> --- a/include/net/dsa.h
> +++ b/include/net/dsa.h
> @@ -196,6 +196,7 @@ struct dsa_port {
>  
>  	struct dsa_switch	*ds;
>  	unsigned int		index;
> +	unsigned int		phy_base_addr;
>  	const char		*name;
>  	const struct dsa_port	*cpu_dp;
>  	struct device_node	*dn;
> diff --git a/net/dsa/slave.c b/net/dsa/slave.c
> index a1c9fe155057..4f67dff34a3b 100644
> --- a/net/dsa/slave.c
> +++ b/net/dsa/slave.c
> @@ -1221,7 +1221,8 @@ static int dsa_slave_phy_setup(struct net_device *slave_dev)
>  		/* We could not connect to a designated PHY or SFP, so use the
>  		 * switch internal MDIO bus instead
>  		 */
> -		ret = dsa_slave_phy_connect(slave_dev, dp->index);
> +		ret = dsa_slave_phy_connect(slave_dev, dp->phy_base_addr +
> +			dp->index);
>  		if (ret) {
>  			netdev_err(slave_dev,
>  				   "failed to connect to port %d: %d\n",
> 


-- 
Florian