summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
authorTroy Kisky <troy.kisky@boundarydevices.com>2012-07-03 16:52:23 -0700
committerTroy Kisky <troy.kisky@boundarydevices.com>2012-07-03 16:52:23 -0700
commitbfecaa2c2dc7583a42523c2ab136d21a97887289 (patch)
tree15b5d5eba1b92d6e59b36884f563bc9ae72cd70e /drivers
parent37d87c18b131517e4f38593c816db4ce3efe5819 (diff)
micrel: powerdown if phy halted and link int disabled
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/phy/micrel.c43
1 files changed, 33 insertions, 10 deletions
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 80747d2d1118..6eafb5cf4902 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -16,6 +16,7 @@
* ks8001, ks8737, ks8721, ks8041, ks8051 100/10 phy
*/
+#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/phy.h>
@@ -48,16 +49,34 @@ static int kszphy_ack_interrupt(struct phy_device *phydev)
int rc;
rc = phy_read(phydev, MII_KSZPHY_INTCS);
-
return (rc < 0) ? rc : 0;
}
static int kszphy_set_interrupt(struct phy_device *phydev)
{
- int temp;
- temp = (PHY_INTERRUPT_ENABLED == phydev->interrupts) ?
- KSZPHY_INTCS_ALL : 0;
- return phy_write(phydev, MII_KSZPHY_INTCS, temp);
+ int bmcr, new_bmcr;
+ bmcr = phy_read(phydev, MII_BMCR);
+ if (PHY_INTERRUPT_ENABLED == phydev->interrupts) {
+ new_bmcr = bmcr & ~BMCR_PDOWN;
+ if (bmcr != new_bmcr) {
+ unsigned intcs, temp;
+ phy_write(phydev, MII_BMCR, new_bmcr);
+ udelay(100); /* power up needs delay after */
+ /* force master mode */
+ phy_write(phydev, 0x9, 0x1f00);
+ }
+ return phy_write(phydev, MII_KSZPHY_INTCS, KSZPHY_INTCS_ALL);
+ } else {
+ phy_write(phydev, MII_KSZPHY_INTCS, 0);
+ new_bmcr = bmcr | BMCR_PDOWN;
+ if ((PHY_HALTED == phydev->state) && (bmcr != new_bmcr)) {
+ phy_write(phydev, MII_BMCR, bmcr | BMCR_ANRESTART);
+ /* let phy note link is down before poweroff */
+ udelay(10);
+ phy_write(phydev, MII_BMCR, new_bmcr);
+ }
+ return 0;
+ }
}
static int kszphy_config_intr(struct phy_device *phydev)
@@ -66,8 +85,10 @@ static int kszphy_config_intr(struct phy_device *phydev)
/* set the interrupt pin active low */
temp = phy_read(phydev, MII_KSZPHY_CTRL);
- temp &= ~KSZPHY_CTRL_INT_ACTIVE_HIGH;
- phy_write(phydev, MII_KSZPHY_CTRL, temp);
+ if (temp & KSZPHY_CTRL_INT_ACTIVE_HIGH) {
+ temp &= ~KSZPHY_CTRL_INT_ACTIVE_HIGH;
+ phy_write(phydev, MII_KSZPHY_CTRL, temp);
+ }
rc = kszphy_set_interrupt(phydev);
return rc < 0 ? rc : 0;
}
@@ -76,10 +97,12 @@ static int ksz9021_config_intr(struct phy_device *phydev)
{
int temp, rc;
- /* set the interrupt pin active low */
temp = phy_read(phydev, MII_KSZPHY_CTRL);
- temp &= ~KSZ9021_CTRL_INT_ACTIVE_HIGH;
- phy_write(phydev, MII_KSZPHY_CTRL, temp);
+ if (temp & KSZ9021_CTRL_INT_ACTIVE_HIGH) {
+ /* set the interrupt pin active low */
+ temp &= ~KSZ9021_CTRL_INT_ACTIVE_HIGH;
+ phy_write(phydev, MII_KSZPHY_CTRL, temp);
+ }
rc = kszphy_set_interrupt(phydev);
return rc < 0 ? rc : 0;
}