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mmc: omap_hsmmc: Introduce omap_hsmmc_prepare/complete 

prepare() is supposed to prevent new children from being registered.
On the MMC subsystem, children (new cards) registration starts with
the card detect IRQ.

Move card detect IRQ disabling to prepare() so that no new cards
will be registered while we're trying to suspend.

Likewise, move card detect IRQ enabling to complete() so we only
try to register new children after our MMC IP is back up.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Venkatraman S <svenkatr@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Felipe Balbi 2012-11-19 21:59:59 +05:30 committed by Chris Ball
parent cd587096c0
commit a48ce884d5
1 changed files with 24 additions and 20 deletions
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44
drivers/mmc/host/omap_hsmmc.c
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@ -2070,6 +2070,25 @@ static int __devexit omap_hsmmc_remove(struct platform_device *pdev)
}
#ifdef CONFIG_PM
static int omap_hsmmc_prepare(struct device *dev)
{
struct omap_hsmmc_host *host = dev_get_drvdata(dev);
if (host->pdata->suspend)
return host->pdata->suspend(dev, host->slot_id);
return 0;
}
static void omap_hsmmc_complete(struct device *dev)
{
struct omap_hsmmc_host *host = dev_get_drvdata(dev);
if (host->pdata->resume)
host->pdata->resume(dev, host->slot_id);
}
static int omap_hsmmc_suspend(struct device *dev)
{
int ret = 0;
@ -2083,23 +2102,10 @@ static int omap_hsmmc_suspend(struct device *dev)
pm_runtime_get_sync(host->dev);
host->suspended = 1;
if (host->pdata->suspend) {
ret = host->pdata->suspend(dev, host->slot_id);
if (ret) {
dev_dbg(dev, "Unable to handle MMC board"
" level suspend\n");
host->suspended = 0;
return ret;
}
}
ret = mmc_suspend_host(host->mmc);
if (ret) {
host->suspended = 0;
if (host->pdata->resume) {
if (host->pdata->resume(dev, host->slot_id))
dev_dbg(dev, "Unmask interrupt failed\n");
}
goto err;
}
@ -2136,12 +2142,6 @@ static int omap_hsmmc_resume(struct device *dev)
if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER))
omap_hsmmc_conf_bus_power(host);
if (host->pdata->resume) {
ret = host->pdata->resume(dev, host->slot_id);
if (ret)
dev_dbg(dev, "Unmask interrupt failed\n");
}
omap_hsmmc_protect_card(host);
/* Notify the core to resume the host */
@ -2157,8 +2157,10 @@ static int omap_hsmmc_resume(struct device *dev)
}
#else
#define omap_hsmmc_prepare NULL
#define omap_hsmmc_complete NULL
#define omap_hsmmc_suspend NULL
#define omap_hsmmc_resume NULL
#define omap_hsmmc_resume NULL
#endif
static int omap_hsmmc_runtime_suspend(struct device *dev)
@ -2186,6 +2188,8 @@ static int omap_hsmmc_runtime_resume(struct device *dev)
static struct dev_pm_ops omap_hsmmc_dev_pm_ops = {
.suspend = omap_hsmmc_suspend,
.resume = omap_hsmmc_resume,
.prepare = omap_hsmmc_prepare,
.complete = omap_hsmmc_complete,
.runtime_suspend = omap_hsmmc_runtime_suspend,
.runtime_resume = omap_hsmmc_runtime_resume,
};