smsc911x: add support for platform-specific irq flags

this patch adds support for the platform_device's resources to indicate
additional flags to use when registering the irq, for example
IORESOURCE_IRQ_LOWLEVEL (which corresponds to IRQF_TRIGGER_LOW).  These
should be set in the irq resource flags field.

Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 14 insertions, 5 deletions

diff --git a/drivers/net/smsc911x.c b/drivers/net/smsc911x.c
index ae4c74b51827..d273a0720ef1 100644
--- a/drivers/net/smsc911x.c
+++ b/drivers/net/smsc911x.c
@@ -1886,9 +1886,9 @@ static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
         struct net_device *dev;
         struct smsc911x_data *pdata;
         struct smsc911x_platform_config *config = pdev->dev.platform_data;
-        struct resource *res;
+        struct resource *res, *irq_res;
         unsigned int intcfg = 0;
-        int res_size;
+        int res_size, irq_flags;
         int retval;
         DECLARE_MAC_BUF(mac);
 
@@ -1913,6 +1913,14 @@ static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
         }
         res_size = res->end - res->start;
 
+        irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+        if (!irq_res) {
+                pr_warning("%s: Could not allocate irq resource.\n",
+                        SMSC_CHIPNAME);
+                retval = -ENODEV;
+                goto out_0;
+        }
+
         if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
                 retval = -EBUSY;
                 goto out_0;
@@ -1929,7 +1937,8 @@ static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
 
         pdata = netdev_priv(dev);
 
-        dev->irq = platform_get_irq(pdev, 0);
+        dev->irq = irq_res->start;
+        irq_flags = irq_res->flags & IRQF_TRIGGER_MASK;
         pdata->ioaddr = ioremap_nocache(res->start, res_size);
 
         /* copy config parameters across to pdata */
@@ -1962,8 +1971,8 @@ static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
         smsc911x_reg_write(pdata, INT_EN, 0);
         smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
 
-        retval = request_irq(dev->irq, smsc911x_irqhandler, IRQF_DISABLED,
-                             dev->name, dev);
+        retval = request_irq(dev->irq, smsc911x_irqhandler,
+                             irq_flags | IRQF_DISABLED, dev->name, dev);
         if (retval) {
                 SMSC_WARNING(PROBE,
                         "Unable to claim requested irq: %d", dev->irq);