i2c: designware: add CONFIG_PM_SLEEP to suspend/resume functions

Add CONFIG_PM_SLEEP to suspend/resume functions to fix the following
build warning when CONFIG_PM_SLEEP is not selected. This is because
sleep PM callbacks defined by SIMPLE_DEV_PM_OPS are only used when
the CONFIG_PM_SLEEP is enabled.

drivers/i2c/busses/i2c-designware-platdrv.c:211:12: warning: 'dw_i2c_suspend' defined but not used [-Wunused-function]
drivers/i2c/busses/i2c-designware-platdrv.c:221:12: warning: 'dw_i2c_resume' defined but not used [-Wunused-function]

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 4c5fadabe49d..64ffb908641c 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -207,7 +207,7 @@ static const struct of_device_id dw_i2c_of_match[] = {
 MODULE_DEVICE_TABLE(of, dw_i2c_of_match);
 #endif
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int dw_i2c_suspend(struct device *dev)
 {
         struct platform_device *pdev = to_platform_device(dev);
@@ -228,9 +228,12 @@ static int dw_i2c_resume(struct device *dev)
 
         return 0;
 }
-#endif
 
 static SIMPLE_DEV_PM_OPS(dw_i2c_dev_pm_ops, dw_i2c_suspend, dw_i2c_resume);
+#define DW_I2C_DEV_PM_OPS       (&dw_i2c_dev_pm_ops)
+#else
+#define DW_I2C_DEV_PM_OPS       NULL
+#endif
 
 /* work with hotplug and coldplug */
 MODULE_ALIAS("platform:i2c_designware");
@@ -242,7 +245,7 @@ static struct platform_driver dw_i2c_driver = {
                 .owner  = THIS_MODULE,
                 .of_match_table = of_match_ptr(dw_i2c_of_match),
                 .acpi_match_table = ACPI_PTR(dw_i2c_acpi_match),
-                .pm     = &dw_i2c_dev_pm_ops,
+                .pm     = DW_I2C_DEV_PM_OPS,
         },
 };