phylib: Allow early-out in phy_change
Marvell 88E1121R Dual PHY device can be hardware-configured
to use shared interrupt pin for both PHY ports. For such
PHY configurations using shared PHY interrupt phy_interrupt()
handler will also schedule a work for PHY port which didn't
cause an interrupt.
This patch adds a possibility for PHY drivers to provide
did_interrupt() function which reports if the PHY (or a PHY
port in a multi-PHY device) generated an interrupt. This
function is called in phy_change() as phy_change() shouldn't
proceed if it is invoked for a PHY which didn't cause an
interrupt. So check for interrupt originator in phy_change()
to allow early-out.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 32cf14a..97e40cb 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -388,6 +388,12 @@
/* Enables or disables interrupts */
int (*config_intr)(struct phy_device *phydev);
+ /*
+ * Checks if the PHY generated an interrupt.
+ * For multi-PHY devices with shared PHY interrupt pin
+ */
+ int (*did_interrupt)(struct phy_device *phydev);
+
/* Clears up any memory if needed */
void (*remove)(struct phy_device *phydev);