net: dsa: b53: Add ability to enable/disable port interrupts

Some switches expose individual interrupt line(s) for port specific
event(s), allow configuring these interrupts at an appropriate time
during port_enable/disable callbacks where all port specific resources
are known to be set-up and ready for use.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/b53/b53_common.c

@@ -502,8 +502,14 @@ int b53_enable_port(struct dsa_switch *ds, int port, struct phy_device *phy)
 {
 	struct b53_device *dev = ds->priv;
 	unsigned int cpu_port = ds->ports[port].cpu_dp->index;
+	int ret = 0;
 	u16 pvlan;
 
+	if (dev->ops->irq_enable)
+		ret = dev->ops->irq_enable(dev, port);
+	if (ret)
+		return ret;
+
 	/* Clear the Rx and Tx disable bits and set to no spanning tree */
 	b53_write8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), 0);
 
@@ -536,6 +542,9 @@ void b53_disable_port(struct dsa_switch *ds, int port, struct phy_device *phy)
 	b53_read8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), &reg);
 	reg |= PORT_CTRL_RX_DISABLE | PORT_CTRL_TX_DISABLE;
 	b53_write8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), reg);
+
+	if (dev->ops->irq_disable)
+		dev->ops->irq_disable(dev, port);
 }
 EXPORT_SYMBOL(b53_disable_port);
 

drivers/net/dsa/b53/b53_priv.h

@@ -43,6 +43,8 @@ struct b53_io_ops {
 	int (*write64)(struct b53_device *dev, u8 page, u8 reg, u64 value);
 	int (*phy_read16)(struct b53_device *dev, int addr, int reg, u16 *value);
 	int (*phy_write16)(struct b53_device *dev, int addr, int reg, u16 value);
+	int (*irq_enable)(struct b53_device *dev, int port);
+	void (*irq_disable)(struct b53_device *dev, int port);
 };
 
 enum {