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>
diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h
index 842b429..39709ec 100644
--- a/arch/arm/plat-omap/include/plat/omap-serial.h
+++ b/arch/arm/plat-omap/include/plat/omap-serial.h
@@ -70,6 +70,7 @@
int (*get_context_loss_count)(struct device *);
void (*set_forceidle)(struct platform_device *);
void (*set_noidle)(struct platform_device *);
+ void (*enable_wakeup)(struct platform_device *, bool);
};
struct uart_omap_dma {
@@ -124,6 +125,7 @@
unsigned long port_activity;
u32 context_loss_cnt;
u32 errata;
+ u8 wakeups_enabled;
};
#endif /* __OMAP_SERIAL_H__ */
