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authorJoakim Tjernlund <joakim.tjernlund@infinera.com>2018-12-14 15:17:05 +0100
committerDavid S. Miller <davem@davemloft.net>2018-12-17 11:24:32 -0800
commitb3e5464e36c07dba70b544044a297d5819351765 (patch)
treeed694951dab275d9335067ea3e0cc64e2100fb78
parent4beaacc6fea5a5ec43c55c22a6c83c03a5ecc775 (diff)
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: Joakim Tjernlund <joakim.tjernlund@infinera.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/phy/fixed_phy.c24
-rw-r--r--include/linux/phy_fixed.h5
2 files changed, 28 insertions, 1 deletions
diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c
index f7fb62712cd8..72d43c88e6ff 100644
--- a/drivers/net/phy/fixed_phy.c
+++ b/drivers/net/phy/fixed_phy.c
@@ -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,
diff --git a/include/linux/phy_fixed.h b/include/linux/phy_fixed.h
index ee54453a40a0..9525567b1951 100644
--- a/include/linux/phy_fixed.h
+++ b/include/linux/phy_fixed.h
@@ -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 */