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authorBen Dooks <ben-linux@fluff.org>2008-02-05 00:02:04 +0000
committerJeff Garzik <jeff@garzik.org>2008-02-11 11:06:24 -0500
commit1a5f1c4ff80f522555d78d4dd0109f18395c6d83 (patch)
tree7da2529a1137d112cb8665107aa1f746b6163dd4 /drivers/net
parent5b2b4ff05593bc35c90dac84ecb82cb7501ecd07 (diff)
DM9000: Pass IRQ flags via platform resources
Use the flags in the IRQ resource to specify the type of IRQ being requested, so that systems which do not have level-based interrupts, or change the interrupt in some other way can specify this without making an #ifdef mess in the driver. This is specifically designed to undo the change in commit 4e4fc05a2b6e7bd2e0facd96e0c18dceb34d9349 which hardwires the type for everyone but blackfin to IRQT_RISING, which breaks all a number of Simtec boards which use (and setup in the bootloader) active low IRQs. Note, although there where originally objections due to the use of IORESOURCE_IRQ and IRQT_ flags not sharing the same definition, at least <include/linux/interrupt.h> notes these are the same. Signed-off-by: Ben Dooks <ben-linux@fluff.org> CC: Daniel Mack <daniel@caiaq.de> CC: Bryan Wu <bryan.wu@analog.com> CC: Alex Landau <landau.alex@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/dm9000.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/net/dm9000.c b/drivers/net/dm9000.c
index 5470062659f..ec9730aee1e 100644
--- a/drivers/net/dm9000.c
+++ b/drivers/net/dm9000.c
@@ -90,9 +90,9 @@
#define writesb outsb
#define writesw outsw
#define writesl outsl
-#define DM9000_IRQ_FLAGS (IRQF_SHARED | IRQF_TRIGGER_HIGH)
+#define DEFAULT_TRIGGER IRQF_TRIGGER_HIGH
#else
-#define DM9000_IRQ_FLAGS (IRQF_SHARED | IRQT_RISING)
+#define DEFAULT_TRIGGER (0)
#endif
/*
@@ -614,10 +614,21 @@ static int
dm9000_open(struct net_device *dev)
{
board_info_t *db = (board_info_t *) dev->priv;
+ unsigned long irqflags = db->irq_res->flags & IRQF_TRIGGER_MASK;
dev_dbg(db->dev, "entering %s\n", __func__);
- if (request_irq(dev->irq, &dm9000_interrupt, DM9000_IRQ_FLAGS, dev->name, dev))
+ /* If there is no IRQ type specified, default to something that
+ * may work, and tell the user that this is a problem */
+
+ if (irqflags == IRQF_TRIGGER_NONE) {
+ dev_warn(db->dev, "WARNING: no IRQ resource flags set.\n");
+ irqflags = DEFAULT_TRIGGER;
+ }
+
+ irqflags |= IRQF_SHARED;
+
+ if (request_irq(dev->irq, &dm9000_interrupt, irqflags, dev->name, dev))
return -EAGAIN;
/* Initialize DM9000 board */