aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/libata.h
diff options
context:
space:
mode:
authorTejun Heo <htejun@gmail.com>2006-04-11 09:22:29 -0400
committerJeff Garzik <jeff@garzik.org>2006-04-11 13:19:11 -0400
commitc22daff41001e9ccead87179ac0547f85447139e (patch)
treeb8faa6e19419704c19f07a9f7043ab2435f719df /include/linux/libata.h
parent643be977f9feba8c3c1e768fc06cac84596ec6f8 (diff)
[PATCH] libata: implement ata_wait_register()
As waiting for some register bits to change seems to be a common operation shared by some controllers, implement helper function ata_wait_register(). This function also takes care of register write flushing. Note that the condition is inverted, the wait is over when the masked value does NOT match @val. As we're waiting for bits to change, this test is more powerful and allows the function to be used in more places. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'include/linux/libata.h')
-rw-r--r--include/linux/libata.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h
index d5fd5c06e755..dd5bcb5d29b5 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -543,6 +543,9 @@ extern unsigned int ata_busy_sleep(struct ata_port *ap,
543 unsigned long timeout); 543 unsigned long timeout);
544extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), 544extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
545 void *data, unsigned long delay); 545 void *data, unsigned long delay);
546extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
547 unsigned long interval_msec,
548 unsigned long timeout_msec);
546 549
547/* 550/*
548 * Default driver ops implementations 551 * Default driver ops implementations