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ARM: OMAP2+: UART: Add wakeup mechanism for omap-uarts

Selaa lähdekoodia 
From the runtime callbacks enable hwmod wakeups for uart which will
internally enable io-pad wakeups for uarts if they have rx-pad pins
set as wakeup capabale.

Use the io-ring wakeup mechanism after uart clock gating and leave
the PM_WKST set for uart to default reset values cleanup the
code in serial.c which was handling PM_WKST reg.
Irq_chaing(PRM_DRIVER) is used to wakeup uart after uart clocks are gated
using pad wakeup mechanism.

Signed-off-by: Govindraj.R <govindraj.raja@ti.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de> (for drivers/tty changes)
Signed-off-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Govindraj.R
2011-10-13 14:11:09 +05:30
committed by Kevin Hilman
vanhempi 94734749af
commit 62f3ec5fbd
3 muutettua tiedostoa jossa 29 lisäystä ja 84 poistoa
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15
drivers/tty/serial/omap-serial.c
Näytä tiedosto

@@ -1496,9 +1496,24 @@ static int serial_omap_runtime_suspend(struct device *dev)
if (!up)
return -EINVAL;
if (!pdata->enable_wakeup)
return 0;
if (pdata->get_context_loss_count)
up->context_loss_cnt = pdata->get_context_loss_count(dev);
if (device_may_wakeup(dev)) {
if (!up->wakeups_enabled) {
pdata->enable_wakeup(up->pdev, true);
up->wakeups_enabled = true;
}
} else {
if (up->wakeups_enabled) {
pdata->enable_wakeup(up->pdev, false);
up->wakeups_enabled = false;
}
}
/* Errata i291 */
if (up->use_dma && pdata->set_forceidle &&
(up->errata & UART_ERRATA_i291_DMA_FORCEIDLE))