Re: [net-next PATCH v5 13/15] phylink: introduce phylink_fwnode_phy_connect()
On Mon, Feb 08, 2021 at 03:31:11PM +, Russell King - ARM Linux admin wrote:
> On Mon, Feb 08, 2021 at 08:42:42PM +0530, Calvin Johnson wrote:
> > +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;
> > +
> > + if (is_of_node(fwnode)) {
> > + /* 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;
>
> This difference between ACPI and DT really needs to be described in the
> commit description.
>
> For example, why is it acceptable to have a PHY in fixed-link mode if
> we're using ACPI, and not DT?
>
> If we look at the phylink code, accepting a PHY when in fixed-link mode
> is basically not supported... so why should ACPI allow this?
DT and ACPI should handle fixed-link in similar manner. I'll remove the OF
check.
Thanks
Calvin
Re: [net-next PATCH v5 13/15] phylink: introduce phylink_fwnode_phy_connect()
Re: [net-next PATCH v5 13/15] phylink: introduce phylink_fwnode_phy_connect()
On Mon, Feb 08, 2021 at 08:42:42PM +0530, Calvin Johnson wrote: > Define phylink_fwnode_phy_connect() to connect phy specified by > a fwnode to a phylink instance. > > Signed-off-by: Calvin Johnson Also, the subject line should be "net: phylink: ..." Consistency is really appreciated. Thanks. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
Re: [net-next PATCH v5 13/15] phylink: introduce phylink_fwnode_phy_connect()
On Mon, Feb 08, 2021 at 08:42:42PM +0530, Calvin Johnson wrote:
> +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;
> +
> + if (is_of_node(fwnode)) {
> + /* 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;
This difference between ACPI and DT really needs to be described in the
commit description.
For example, why is it acceptable to have a PHY in fixed-link mode if
we're using ACPI, and not DT?
If we look at the phylink code, accepting a PHY when in fixed-link mode
is basically not supported... so why should ACPI allow this?
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
[net-next PATCH v5 13/15] phylink: introduce phylink_fwnode_phy_connect()
Define phylink_fwnode_phy_connect() to connect phy specified by
a fwnode to a phylink instance.
Signed-off-by: Calvin Johnson
---
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 | 56 +++
include/linux/phylink.h | 3 +++
2 files changed, 59 insertions(+)
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 84f6e197f965..5466e1e6272a 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -5,6 +5,7 @@
*
* Copyright (C) 2015 Russell King
*/
+#include
#include
#include
#include
@@ -1120,6 +1121,61 @@ 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 phylink returned from phylink_create()
+ * @fwnode: a pointer to a 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;
+
+ if (is_of_node(fwnode)) {
+ /* 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 d81a714cfbbd..75d4f99090fd 100644
--- a/include/linux/phylink.h
+++ b/include/linux/phylink.h
@@ -439,6 +439,9 @@ 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);
--
2.17.1
