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Commit 3244fcd2 authored by Kevin Hilman's avatar Kevin Hilman
Browse files

OMAP: UART: don't do automatic bus-level suspend/resume 



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: default avatarGovindraj.R <govindraj.raja@ti.com>
Signed-off-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
parent c04ede38

arch/arm/mach-omap2/serial.c

+6 −2
Original line number Diff line number Diff line
@@ -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>
@@ -530,16 +531,19 @@ 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);

		}

	}

}



static ssize_t sleep_timeout_show(struct device *dev,

				  struct device_attribute *attr,