In order to make it possible to restore from hibernation not only in Linux but
also in e.g. U-Boot, we have to use sci_{suspend|resume}() for the PM {freeze|
thaw|restore}() methods. It's handy to achieve this by using SIMPLE_DEV_PM_OPS()
macro, however we have to annotate sci_{suspend|remove}() with '__maybe_unused'
in order to avoid compilation warnings when CONFIG_PM_SLEEP is undefined.
Based on original patch by Mikhail Ulyanov <mikhail.ulyanov@xxxxxxxxxxxxxxxxxx>.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
---
This patch is against the 'tty-next' branch of GregKH's 'tty.git' repo.
Changes in version 2:
- fixed typos and too long line in the changelog.
drivers/tty/serial/sh-sci.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
Index: tty/drivers/tty/serial/sh-sci.c
===================================================================
--- tty.orig/drivers/tty/serial/sh-sci.c
+++ tty/drivers/tty/serial/sh-sci.c
@@ -2605,7 +2605,7 @@ static int sci_probe(struct platform_dev
return 0;
}
-static int sci_suspend(struct device *dev)
+static __maybe_unused int sci_suspend(struct device *dev)
{
struct sci_port *sport = dev_get_drvdata(dev);
@@ -2615,7 +2615,7 @@ static int sci_suspend(struct device *de
return 0;
}
-static int sci_resume(struct device *dev)
+static __maybe_unused int sci_resume(struct device *dev)
{
struct sci_port *sport = dev_get_drvdata(dev);
@@ -2625,10 +2625,7 @@ static int sci_resume(struct device *dev
return 0;
}
-static const struct dev_pm_ops sci_dev_pm_ops = {
- .suspend = sci_suspend,
- .resume = sci_resume,
-};
+static SIMPLE_DEV_PM_OPS(sci_dev_pm_ops, sci_suspend, sci_resume);
static struct platform_driver sci_driver = {
.probe = sci_probe,
--
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