| Message ID | 20210611105401.270673-14-ciorneiioana@gmail.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | ACPI support for dpaa2 driver | expand |
On Fri, Jun 11, 2021 at 01:53:59PM +0300, Ioana Ciornei wrote: > From: Calvin Johnson <calvin.johnson@oss.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@oss.nxp.com> > Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com> > Acked-by: Grant Likely <grant.likely@arm.com> Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.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 > >
Fri, Jun 11, 2021 at 01:53:59PM +0300, Ioana Ciornei kirjoitti: > From: Calvin Johnson <calvin.johnson@oss.nxp.com> > > Define phylink_fwnode_phy_connect() to connect phy specified by > a fwnode to a phylink instance. ... > +/** > + * 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); As per previous mail, who and when acquire this reference counting? Can it be possible that caller will never call phylink_fwnode_phy_connect() and hence reference counting will become disbalances? We need to fix all this before the release. > + 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; > +}
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);