ARM: OMAP2+: UART: Get context loss count to context restore

Avoid unconditional context restore every time we gate uart
clocks. Check whether context loss happened based on which
we can context restore uart regs from uart_port structure.

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>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index b3f3284bf6ba..78ca7e8fc10b 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -33,6 +33,7 @@
 #include <plat/dma.h>
 #include <plat/omap_hwmod.h>
 #include <plat/omap_device.h>
+#include <plat/omap-pm.h>
 
 #include "prm2xxx_3xxx.h"
 #include "pm.h"
@@ -478,6 +479,7 @@ void __init omap_serial_init_port(struct omap_board_data *bdata)
         omap_up.dma_enabled = uart->dma_enabled;
         omap_up.uartclk = OMAP24XX_BASE_BAUD * 16;
         omap_up.flags = UPF_BOOT_AUTOCONF;
+        omap_up.get_context_loss_count = omap_pm_get_dev_context_loss_count;
 
         pdata = &omap_up;
         pdata_size = sizeof(struct omap_uart_port_info);