diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-20 16:39:23 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-20 16:39:23 -0800 |
commit | fc887b15d935ead2a00aef5779a18034e7c69ee1 (patch) | |
tree | 30daa1c9bafbf179047047c67d11ccd98e27d809 /drivers/tty/hvc/hvc_irq.c | |
parent | 466c19063b4b426d5c362572787cb249fbf4296b (diff) | |
parent | df6212529c646710502657b18d8f42927f3dda81 (diff) |
Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
* 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
tty: update MAINTAINERS file due to driver movement
tty: move drivers/serial/ to drivers/tty/serial/
tty: move hvc drivers to drivers/tty/hvc/
Diffstat (limited to 'drivers/tty/hvc/hvc_irq.c')
-rw-r--r-- | drivers/tty/hvc/hvc_irq.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/tty/hvc/hvc_irq.c b/drivers/tty/hvc/hvc_irq.c new file mode 100644 index 00000000000..2623e177e8d --- /dev/null +++ b/drivers/tty/hvc/hvc_irq.c @@ -0,0 +1,49 @@ +/* + * Copyright IBM Corp. 2001,2008 + * + * This file contains the IRQ specific code for hvc_console + * + */ + +#include <linux/interrupt.h> + +#include "hvc_console.h" + +static irqreturn_t hvc_handle_interrupt(int irq, void *dev_instance) +{ + /* if hvc_poll request a repoll, then kick the hvcd thread */ + if (hvc_poll(dev_instance)) + hvc_kick(); + return IRQ_HANDLED; +} + +/* + * For IRQ based systems these callbacks can be used + */ +int notifier_add_irq(struct hvc_struct *hp, int irq) +{ + int rc; + + if (!irq) { + hp->irq_requested = 0; + return 0; + } + rc = request_irq(irq, hvc_handle_interrupt, IRQF_DISABLED, + "hvc_console", hp); + if (!rc) + hp->irq_requested = 1; + return rc; +} + +void notifier_del_irq(struct hvc_struct *hp, int irq) +{ + if (!hp->irq_requested) + return; + free_irq(irq, hp); + hp->irq_requested = 0; +} + +void notifier_hangup_irq(struct hvc_struct *hp, int irq) +{ + notifier_del_irq(hp, irq); +} |