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| author |   Govindraj.R <govindraj.raja@ti.com> | 2011-10-13 14:11:09 +0530 |
|---|---|---|
| committer |   Kevin Hilman <khilman@ti.com> | 2011-12-14 16:05:23 -0800 |
| commit | 62f3ec5fbd5fddce62b7a71adc04723a5eb903da (patch) | |
| tree | 682d86d38cf888bd10622479d779e862ebcee6d3 /drivers/tty | |
| parent | ARM: OMAP2+: UART: Move errata handling from serial.c to omap-serial (diff) | |
| download | linux-dev-62f3ec5fbd5fddce62b7a71adc04723a5eb903da.tar.xz linux-dev-62f3ec5fbd5fddce62b7a71adc04723a5eb903da.zip | |
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.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 764ac7795694..45a25a01c44d 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)) |