---

yaml --- r: 281904 b: refs/heads/master c: ec3bebc h: refs/heads/master v: v3
git-mirror · Dec 15, 2011 · eafe8fb · eafe8fb
1 parent 5c34195
commit eafe8fb
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Showing 4 changed files with 24 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 32212897eeb8c2b2b3c74dbd44d842963084d808
+refs/heads/master: ec3bebc6ec64aac23500e6b8ef5c0aaaeda735cf
diff --git a/trunk/arch/arm/mach-omap2/serial.c b/trunk/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);

diff --git a/trunk/arch/arm/plat-omap/include/plat/omap-serial.h b/trunk/arch/arm/plat-omap/include/plat/omap-serial.h
@@ -62,6 +62,8 @@ struct omap_uart_port_info {
 	bool			dma_enabled;	/* To specify DMA Mode */
 	unsigned int		uartclk;	/* UART clock rate */
 	upf_t			flags;		/* UPF_* flags */
+
+	int (*get_context_loss_count)(struct device *);
 };
 
 struct uart_omap_dma {
@@ -114,6 +116,7 @@ struct uart_omap_port {
 	unsigned char		msr_saved_flags;
 	char			name[20];
 	unsigned long		port_activity;
+	u32			context_loss_cnt;
 };
 
 #endif /* __OMAP_SERIAL_H__ */
diff --git a/trunk/drivers/tty/serial/omap-serial.c b/trunk/drivers/tty/serial/omap-serial.c
@@ -1440,15 +1440,31 @@ static void serial_omap_restore_context(struct uart_omap_port *up)
 #ifdef CONFIG_PM_RUNTIME
 static int serial_omap_runtime_suspend(struct device *dev)
 {
+	struct uart_omap_port *up = dev_get_drvdata(dev);
+	struct omap_uart_port_info *pdata = dev->platform_data;
+
+	if (!up)
+		return -EINVAL;
+
+	if (pdata->get_context_loss_count)
+		up->context_loss_cnt = pdata->get_context_loss_count(dev);
+
 	return 0;
 }
 
 static int serial_omap_runtime_resume(struct device *dev)
 {
 	struct uart_omap_port *up = dev_get_drvdata(dev);
+	struct omap_uart_port_info *pdata = dev->platform_data;
 
-	if (up)
-		serial_omap_restore_context(up);
+	if (up) {
+		if (pdata->get_context_loss_count) {
+			u32 loss_cnt = pdata->get_context_loss_count(dev);
+
+			if (up->context_loss_cnt != loss_cnt)
+				serial_omap_restore_context(up);
+		}
+	}
 
 	return 0;
 }