Merge branch 'phy'

Florian Fainelli says:

====================
net: phy: soft reset rework for 10G PHYs

As reported by Shaohui, 10G PHYs may have a slightly more complex reset
sequence for which a BMCR_RESET software reset might not suffice. This
patchset offers a solution for those by allowing them to implement their
own soft_reset() callback. Finally there is an update to the PHY library
Documentation to cover for the newly added callbacks of the PHY driver
structure.

Changes in v2:
- fixed callback testing
- fixed typo in Documentation
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 34 insertions, 5 deletions

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index c2d778d06405..a70b604ac644 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -535,16 +535,16 @@ static int phy_poll_reset(struct phy_device *phydev)
 
 int phy_init_hw(struct phy_device *phydev)
 {
-	int ret;
+	int ret = 0;
 
 	if (!phydev->drv || !phydev->drv->config_init)
 		return 0;
 
-	ret = phy_write(phydev, MII_BMCR, BMCR_RESET);
-	if (ret < 0)
-		return ret;
+	if (phydev->drv->soft_reset)
+		ret = phydev->drv->soft_reset(phydev);
+	else
+		ret = genphy_soft_reset(phydev);
 
-	ret = phy_poll_reset(phydev);
 	if (ret < 0)
 		return ret;
 
@@ -1045,6 +1045,27 @@ static int gen10g_read_status(struct phy_device *phydev)
 	return 0;
 }
 
+/**
+ * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
+ * @phydev: target phy_device struct
+ *
+ * Description: Perform a software PHY reset using the standard
+ * BMCR_RESET bit and poll for the reset bit to be cleared.
+ *
+ * Returns: 0 on success, < 0 on failure
+ */
+int genphy_soft_reset(struct phy_device *phydev)
+{
+	int ret;
+
+	ret = phy_write(phydev, MII_BMCR, BMCR_RESET);
+	if (ret < 0)
+		return ret;
+
+	return phy_poll_reset(phydev);
+}
+EXPORT_SYMBOL(genphy_soft_reset);
+
 static int genphy_config_init(struct phy_device *phydev)
 {
 	int val;
@@ -1091,6 +1112,12 @@ static int genphy_config_init(struct phy_device *phydev)
 	return 0;
 }
 
+static int gen10g_soft_reset(struct phy_device *phydev)
+{
+	/* Do nothing for now */
+	return 0;
+}
+
 static int gen10g_config_init(struct phy_device *phydev)
 {
 	/* Temporarily just say we support everything */
@@ -1265,6 +1292,7 @@ static struct phy_driver genphy_driver[] = {
 	.phy_id		= 0xffffffff,
 	.phy_id_mask	= 0xffffffff,
 	.name		= "Generic PHY",
+	.soft_reset	= genphy_soft_reset,
 	.config_init	= genphy_config_init,
 	.features	= 0,
 	.config_aneg	= genphy_config_aneg,
@@ -1277,6 +1305,7 @@ static struct phy_driver genphy_driver[] = {
 	.phy_id         = 0xffffffff,
 	.phy_id_mask    = 0xffffffff,
 	.name           = "Generic 10G PHY",
+	.soft_reset	= gen10g_soft_reset,
 	.config_init    = gen10g_config_init,
 	.features       = 0,
 	.config_aneg    = gen10g_config_aneg,