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[MMC] Allow detection/removal to be delayed

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Change mmc_detect_change() to take a delay argument such that
the detection of card insertions and removals can be delayed
according to the requirements of the host driver or platform.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Richard Purdie 2005-09-08 17:53:01 +01:00 committed by Russell King
parent caf39e87cc
commit 8dc003359c
5 changed files with 13 additions and 9 deletions
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12
drivers/mmc/mmc.c
View file

@ -1079,13 +1079,17 @@ static void mmc_setup(struct mmc_host *host)
/**
* mmc_detect_change - process change of state on a MMC socket
* @host: host which changed state.
* @delay: optional delay to wait before detection (jiffies)
*
* All we know is that card(s) have been inserted or removed
* from the socket(s). We don't know which socket or cards.
*/
void mmc_detect_change(struct mmc_host *host)
void mmc_detect_change(struct mmc_host *host, unsigned long delay)
{
schedule_work(&host->detect);
if (delay)
schedule_delayed_work(&host->detect, delay);
else
schedule_work(&host->detect);
}
EXPORT_SYMBOL(mmc_detect_change);
@ -1189,7 +1193,7 @@ int mmc_add_host(struct mmc_host *host)
ret = mmc_add_host_sysfs(host);
if (ret == 0) {
mmc_power_off(host);
mmc_detect_change(host);
mmc_detect_change(host, 0);
}
return ret;
@ -1259,7 +1263,7 @@ EXPORT_SYMBOL(mmc_suspend_host);
*/
int mmc_resume_host(struct mmc_host *host)
{
mmc_detect_change(host);
mmc_detect_change(host, 0);
return 0;
}

2
drivers/mmc/mmci.c
View file

@ -442,7 +442,7 @@ static void mmci_check_status(unsigned long data)
status = host->plat->status(mmc_dev(host->mmc));
if (status ^ host->oldstat)
mmc_detect_change(host->mmc);
mmc_detect_change(host->mmc, 0);
host->oldstat = status;
mod_timer(&host->timer, jiffies + HZ);

2
drivers/mmc/pxamci.c
View file

@ -423,7 +423,7 @@ static void pxamci_dma_irq(int dma, void *devid, struct pt_regs *regs)
static irqreturn_t pxamci_detect_irq(int irq, void *devid, struct pt_regs *regs)
{
mmc_detect_change(devid);
mmc_detect_change(devid, 0);
return IRQ_HANDLED;
}

4
drivers/mmc/wbsd.c
View file

@ -1122,7 +1122,7 @@ static void wbsd_detect_card(unsigned long data)
DBG("Executing card detection\n");
mmc_detect_change(host->mmc);
mmc_detect_change(host->mmc, 0);
}
/*
@ -1198,7 +1198,7 @@ static void wbsd_tasklet_card(unsigned long param)
*/
spin_unlock(&host->lock);
mmc_detect_change(host->mmc);
mmc_detect_change(host->mmc, 0);
}
else
spin_unlock(&host->lock);

2
include/linux/mmc/host.h
View file

@ -123,7 +123,7 @@ extern void mmc_free_host(struct mmc_host *);
extern int mmc_suspend_host(struct mmc_host *, pm_message_t);
extern int mmc_resume_host(struct mmc_host *);
extern void mmc_detect_change(struct mmc_host *);
extern void mmc_detect_change(struct mmc_host *, unsigned long delay);
extern void mmc_request_done(struct mmc_host *, struct mmc_request *);
#endif