This patch is a step towards allowing PHY drivers to handle more
interrupt sources than just link change. E.g. several PHY's have
built-in temperature monitoring and can raise an interrupt if a
temperature threshold is exceeded. We may be interested in such
interrupts also if the phylib state machine isn't started.
Therefore move enabling interrupts to phy_request_interrupt().
v2:
- patch added to series
Signed-off-by: Heiner Kallweit <hkallwe...@gmail.com>
---
drivers/net/phy/phy.c | 36 ++++++++++++++++++++++--------------
drivers/net/phy/phy_device.c | 2 +-
include/linux/phy.h | 1 +
3 files changed, 24 insertions(+), 15 deletions(-)
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index e88854292..d90d9863e 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -799,10 +799,10 @@ static int phy_enable_interrupts(struct phy_device
*phydev)
}
/**
- * phy_request_interrupt - request interrupt for a PHY device
+ * phy_request_interrupt - request and enable interrupt for a PHY device
* @phydev: target phy_device struct
*
- * Description: Request the interrupt for the given PHY.
+ * Description: Request and enable the interrupt for the given PHY.
* If this fails, then we set irq to PHY_POLL.
* This should only be called with a valid IRQ number.
*/
@@ -817,10 +817,30 @@ void phy_request_interrupt(struct phy_device *phydev)
phydev_warn(phydev, "Error %d requesting IRQ %d, falling back
to polling\n",
err, phydev->irq);
phydev->irq = PHY_POLL;
+ } else {
+ if (phy_enable_interrupts(phydev)) {
+ phydev_warn(phydev, "Can't enable interrupt, falling
back to polling\n");
+ phy_free_interrupt(phydev);
+ phydev->irq = PHY_POLL;
+ }
}
}
EXPORT_SYMBOL(phy_request_interrupt);
+/**
+ * phy_free_interrupt - disable and free interrupt for a PHY device
+ * @phydev: target phy_device struct
+ *
+ * Description: Disable and free the interrupt for the given PHY.
+ * This should only be called with a valid IRQ number.
+ */
+void phy_free_interrupt(struct phy_device *phydev)
+{
+ phy_disable_interrupts(phydev);
+ free_irq(phydev->irq, phydev);
+}
+EXPORT_SYMBOL(phy_free_interrupt);
+
/**
* phy_stop - Bring down the PHY link, and stop checking the status
* @phydev: target phy_device struct
@@ -835,9 +855,6 @@ void phy_stop(struct phy_device *phydev)
mutex_lock(&phydev->lock);
- if (phy_interrupt_is_valid(phydev))
- phy_disable_interrupts(phydev);
-
phydev->state = PHY_HALTED;
mutex_unlock(&phydev->lock);
@@ -864,8 +881,6 @@ EXPORT_SYMBOL(phy_stop);
*/
void phy_start(struct phy_device *phydev)
{
- int err;
-
mutex_lock(&phydev->lock);
if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
@@ -877,13 +892,6 @@ void phy_start(struct phy_device *phydev)
/* if phy was suspended, bring the physical link up again */
__phy_resume(phydev);
- /* make sure interrupts are enabled for the PHY */
- if (phy_interrupt_is_valid(phydev)) {
- err = phy_enable_interrupts(phydev);
- if (err < 0)
- goto out;
- }
-
phydev->state = PHY_UP;
phy_start_machine(phydev);
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 5d288da9a..d71b3ed52 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -1013,7 +1013,7 @@ void phy_disconnect(struct phy_device *phydev)
phy_stop(phydev);
if (phy_interrupt_is_valid(phydev))
- free_irq(phydev->irq, phydev);
+ phy_free_interrupt(phydev);
phydev->adjust_link = NULL;
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 7180b1d1e..72e1196f9 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1147,6 +1147,7 @@ int phy_ethtool_ksettings_set(struct phy_device *phydev,
const struct ethtool_link_ksettings *cmd);
int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd);
void phy_request_interrupt(struct phy_device *phydev);
+void phy_free_interrupt(struct phy_device *phydev);
void phy_print_status(struct phy_device *phydev);
int phy_set_max_speed(struct phy_device *phydev, u32 max_speed);
void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode);
--
2.21.0
