netdev - Re: [PATCH net-next v9 13/15] net: phylink: introduce phylink_fwnode_phy

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Message-ID: <20210611111750.GH22278@shell.armlinux.org.uk>
Date:   Fri, 11 Jun 2021 12:17:50 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Ioana Ciornei <ciorneiioana@...il.com>
Cc:     davem@...emloft.net, kuba@...nel.org, hkallweit1@...il.com,
        netdev@...r.kernel.org, Grant Likely <grant.likely@....com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Jeremy Linton <jeremy.linton@....com>,
        Andrew Lunn <andrew@...n.ch>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Marcin Wojtas <mw@...ihalf.com>,
        Pieter Jansen Van Vuuren <pieter.jansenvv@...boosystems.io>,
        Jon <jon@...id-run.com>, Saravana Kannan <saravanak@...gle.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        calvin.johnson@....nxp.com,
        Cristi Sovaiala <cristian.sovaiala@....com>,
        Florin Laurentiu Chiculita <florinlaurentiu.chiculita@....com>,
        Madalin Bucur <madalin.bucur@....com>,
        linux-arm-kernel@...ts.infradead.org,
        Diana Madalina Craciun <diana.craciun@....com>,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux.cj@...il.com, Laurentiu Tudor <laurentiu.tudor@....com>,
        Len Brown <lenb@...nel.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Ioana Ciornei <ioana.ciornei@....com>
Subject: Re: [PATCH net-next v9 13/15] net: phylink: introduce
 phylink_fwnode_phy_connect()

On Fri, Jun 11, 2021 at 01:53:59PM +0300, Ioana Ciornei wrote:
> From: Calvin Johnson <calvin.johnson@....nxp.com>
> 
> Define phylink_fwnode_phy_connect() to connect phy specified by
> a fwnode to a phylink instance.
> 
> Signed-off-by: Calvin Johnson <calvin.johnson@....nxp.com>
> Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
> Acked-by: Grant Likely <grant.likely@....com>

Reviewed-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>

Thanks.

> ---
> 
> Changes in v9: None
> Changes in v8: None
> Changes in v7: None
> Changes in v6:
> - remove OF check for fixed-link
> 
> Changes in v5: None
> Changes in v4:
> - call phy_device_free() before returning
> 
> Changes in v3: None
> Changes in v2: None
> 
> 
> 
>  drivers/net/phy/phylink.c | 54 +++++++++++++++++++++++++++++++++++++++
>  include/linux/phylink.h   |  3 +++
>  2 files changed, 57 insertions(+)
> 
> diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
> index 96d8e88b4e46..9cc0f69faafe 100644
> --- a/drivers/net/phy/phylink.c
> +++ b/drivers/net/phy/phylink.c
> @@ -5,6 +5,7 @@
>   *
>   * Copyright (C) 2015 Russell King
>   */
> +#include <linux/acpi.h>
>  #include <linux/ethtool.h>
>  #include <linux/export.h>
>  #include <linux/gpio/consumer.h>
> @@ -1125,6 +1126,59 @@ int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn,
>  }
>  EXPORT_SYMBOL_GPL(phylink_of_phy_connect);
>  
> +/**
> + * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode.
> + * @pl: a pointer to a &struct phylink returned from phylink_create()
> + * @fwnode: a pointer to a &struct fwnode_handle.
> + * @flags: PHY-specific flags to communicate to the PHY device driver
> + *
> + * Connect the phy specified @fwnode to the phylink instance specified
> + * by @pl.
> + *
> + * Returns 0 on success or a negative errno.
> + */
> +int phylink_fwnode_phy_connect(struct phylink *pl,
> +			       struct fwnode_handle *fwnode,
> +			       u32 flags)
> +{
> +	struct fwnode_handle *phy_fwnode;
> +	struct phy_device *phy_dev;
> +	int ret;
> +
> +	/* Fixed links and 802.3z are handled without needing a PHY */
> +	if (pl->cfg_link_an_mode == MLO_AN_FIXED ||
> +	    (pl->cfg_link_an_mode == MLO_AN_INBAND &&
> +	     phy_interface_mode_is_8023z(pl->link_interface)))
> +		return 0;
> +
> +	phy_fwnode = fwnode_get_phy_node(fwnode);
> +	if (IS_ERR(phy_fwnode)) {
> +		if (pl->cfg_link_an_mode == MLO_AN_PHY)
> +			return -ENODEV;
> +		return 0;
> +	}
> +
> +	phy_dev = fwnode_phy_find_device(phy_fwnode);
> +	/* We're done with the phy_node handle */
> +	fwnode_handle_put(phy_fwnode);
> +	if (!phy_dev)
> +		return -ENODEV;
> +
> +	ret = phy_attach_direct(pl->netdev, phy_dev, flags,
> +				pl->link_interface);
> +	if (ret) {
> +		phy_device_free(phy_dev);
> +		return ret;
> +	}
> +
> +	ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface);
> +	if (ret)
> +		phy_detach(phy_dev);
> +
> +	return ret;
> +}
> +EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect);
> +
>  /**
>   * phylink_disconnect_phy() - disconnect any PHY attached to the phylink
>   *   instance.
> diff --git a/include/linux/phylink.h b/include/linux/phylink.h
> index fd2acfd9b597..afb3ded0b691 100644
> --- a/include/linux/phylink.h
> +++ b/include/linux/phylink.h
> @@ -441,6 +441,9 @@ void phylink_destroy(struct phylink *);
>  
>  int phylink_connect_phy(struct phylink *, struct phy_device *);
>  int phylink_of_phy_connect(struct phylink *, struct device_node *, u32 flags);
> +int phylink_fwnode_phy_connect(struct phylink *pl,
> +			       struct fwnode_handle *fwnode,
> +			       u32 flags);
>  void phylink_disconnect_phy(struct phylink *);
>  
>  void phylink_mac_change(struct phylink *, bool up);
> -- 
> 2.31.1
> 
> 

-- 
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