summaryrefslogtreecommitdiffstats
path: root/drivers/tty
diff options
context:
space:
mode:
authorGovindraj.R <govindraj.raja@ti.com>2011-10-13 14:11:09 +0530
committerKevin Hilman <khilman@ti.com>2011-12-14 16:05:23 -0800
commit62f3ec5fbd5fddce62b7a71adc04723a5eb903da (patch)
tree682d86d38cf888bd10622479d779e862ebcee6d3 /drivers/tty
parent94734749af794c080f6af6ac3ce8c1c13ee2dbbd (diff)
downloadop-kernel-dev-62f3ec5fbd5fddce62b7a71adc04723a5eb903da.zip
op-kernel-dev-62f3ec5fbd5fddce62b7a71adc04723a5eb903da.tar.gz
ARM: OMAP2+: UART: Add wakeup mechanism for omap-uarts
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>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/omap-serial.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 764ac77..45a25a0 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -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))
OpenPOWER on IntegriCloud