Commit b3e5464e authored by Joakim Tjernlund's avatar Joakim Tjernlund Committed by David S. Miller
Browse files

Fixed PHY: Add fixed_phy_change_carrier() 



Drivers can use this as .ndo_change_carrier() to change carrier
via /sys/class/net/ethX/carrier.

Signed-off-by: default avatarJoakim Tjernlund <joakim.tjernlund@infinera.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4beaacc6

drivers/net/phy/fixed_phy.c

+23 −1
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 
#include <linux/gpio.h>

#include <linux/seqlock.h>

#include <linux/idr.h>

#include <linux/netdevice.h>



#include "swphy.h"
@@ -38,6 +39,7 @@ struct fixed_phy { 
	struct phy_device *phydev;

	seqcount_t seqcount;

	struct fixed_phy_status status;

	bool no_carrier;

	int (*link_update)(struct net_device *, struct fixed_phy_status *);

	struct list_head node;

	int link_gpio;
@@ -48,9 +50,28 @@ static struct fixed_mdio_bus platform_fmb = { 
	.phys = LIST_HEAD_INIT(platform_fmb.phys),

};



int fixed_phy_change_carrier(struct net_device *dev, bool new_carrier)

{

	struct fixed_mdio_bus *fmb = &platform_fmb;

	struct phy_device *phydev = dev->phydev;

	struct fixed_phy *fp;



	if (!phydev || !phydev->mdio.bus)

		return -EINVAL;



	list_for_each_entry(fp, &fmb->phys, node) {

		if (fp->addr == phydev->mdio.addr) {

			fp->no_carrier = !new_carrier;

			return 0;

		}

	}

	return -EINVAL;

}

EXPORT_SYMBOL_GPL(fixed_phy_change_carrier);



static void fixed_phy_update(struct fixed_phy *fp)

{

	if (gpio_is_valid(fp->link_gpio))

	if (!fp->no_carrier && gpio_is_valid(fp->link_gpio))

		fp->status.link = !!gpio_get_value_cansleep(fp->link_gpio);

}
@@ -66,6 +87,7 @@ static int fixed_mdio_read(struct mii_bus *bus, int phy_addr, int reg_num) 


			do {

				s = read_seqcount_begin(&fp->seqcount);

				fp->status.link = !fp->no_carrier;

				/* Issue callback if user registered it. */

				if (fp->link_update) {

					fp->link_update(fp->phydev->attached_dev,

include/linux/phy_fixed.h

+5 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ struct fixed_phy_status { 
struct device_node;



#if IS_ENABLED(CONFIG_FIXED_PHY)

extern int fixed_phy_change_carrier(struct net_device *dev, bool new_carrier);

extern int fixed_phy_add(unsigned int irq, int phy_id,

			 struct fixed_phy_status *status,

			 int link_gpio);
@@ -47,6 +48,10 @@ static inline int fixed_phy_set_link_update(struct phy_device *phydev, 
{

	return -ENODEV;

}

static inline int fixed_phy_change_carrier(struct net_device *dev, bool new_carrier)

{

	return -EINVAL;

}

#endif /* CONFIG_FIXED_PHY */



#endif /* __PHY_FIXED_H */