[PATCH] PM: Add pm_sleep_ops_ptr() macro

[Jingoo Han <jg1.han@samsung.com>]

Add pm_sleep_ops_ptr() macro that allows the .pm entry in the driver structures
to be assigned without having an #define xxx NULL for the case that PM_SLEEP is
not enabled.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Michael Hennerich <michael.hennerich@analog.com>
---
 drivers/video/bfin-lq035q1-fb.c |   20 +++++++++++---------
 include/linux/pm.h              |    6 ++++++
 2 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/drivers/video/bfin-lq035q1-fb.c b/drivers/video/bfin-lq035q1-fb.c
index 29d8c04..4474e64 100644
--- a/drivers/video/bfin-lq035q1-fb.c
+++ b/drivers/video/bfin-lq035q1-fb.c
@@ -170,16 +170,19 @@ static int lq035q1_spidev_remove(struct spi_device *spi)
 	return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
 }
 
-#ifdef CONFIG_PM
-static int lq035q1_spidev_suspend(struct spi_device *spi, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int lq035q1_spidev_suspend(struct device *dev)
 {
+	struct spi_device *spi = to_spi_device(dev);
+
 	return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
 }
 
-static int lq035q1_spidev_resume(struct spi_device *spi)
+static int lq035q1_spidev_resume(struct device *dev)
 {
-	int ret;
+	struct spi_device *spi = to_spi_device(dev);
 	struct spi_control *ctl = spi_get_drvdata(spi);
+	int ret;
 
 	ret = lq035q1_control(spi, LQ035_DRIVER_OUTPUT_CTL, ctl->mode);
 	if (ret)
@@ -187,11 +190,11 @@ static int lq035q1_spidev_resume(struct spi_device *spi)
 
 	return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_ON);
 }
-#else
-# define lq035q1_spidev_suspend NULL
-# define lq035q1_spidev_resume  NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(lq035q1_spidev_pm_ops, lq035q1_spidev_suspend,
+			lq035q1_spidev_resume);
+
 /* Power down all displays on reboot, poweroff or halt */
 static void lq035q1_spidev_shutdown(struct spi_device *spi)
 {
@@ -708,8 +711,7 @@ static int bfin_lq035q1_probe(struct platform_device *pdev)
 	info->spidrv.probe    = lq035q1_spidev_probe;
 	info->spidrv.remove   = lq035q1_spidev_remove;
 	info->spidrv.shutdown = lq035q1_spidev_shutdown;
-	info->spidrv.suspend  = lq035q1_spidev_suspend;
-	info->spidrv.resume   = lq035q1_spidev_resume;
+	info->spidrv.driver.pm = pm_sleep_ops_ptr(&lq035q1_spidev_pm_ops);
 
 	ret = spi_register_driver(&info->spidrv);
 	if (ret < 0) {
diff --git a/include/linux/pm.h b/include/linux/pm.h
index bd50d15..999d652 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -61,6 +61,12 @@ extern const char power_group_name[];		/* = "power" */
 #define pm_ops_ptr(_ptr)	NULL
 #endif
 
+#ifdef CONFIG_PM_SLEEP
+#define pm_sleep_ops_ptr(_ptr)	(_ptr)
+#else
+#define pm_sleep_ops_ptr(_ptr)	NULL
+#endif
+
 typedef struct pm_message {
 	int event;
 } pm_message_t;
-- 
1.7.10.4