From: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
Since the omap_device for UART is currently managed inside the idle
path itself, don't let the bus-level code suspend/resume the UART.
To prevent this, pm_runtime_get() is used when preparing for suspend
and pm_runtime_put() is used when finished with suspend.
Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-omap2/serial.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index ae1bc63..b47194a 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -26,6 +26,7 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/serial_8250.h>
+#include <linux/pm_runtime.h>
#ifdef CONFIG_SERIAL_OMAP
#include <plat/omap-serial.h>
@@ -530,14 +531,17 @@ void omap_uart_enable_irqs(int enable)
struct omap_uart_state *uart;
list_for_each_entry(uart, &uart_list, node) {
- if (enable)
+ if (enable) {
+ pm_runtime_put_sync(&uart->pdev->dev);
ret = request_threaded_irq(uart->irq, NULL,
omap_uart_interrupt,
IRQF_SHARED,
"serial idle",
(void *)uart);
- else
+ } else {
+ pm_runtime_get_noresume(&uart->pdev->dev);
free_irq(uart->irq, (void *)uart);
+ }
}
}
--
1.6.3.3
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