scsi: ufs: Only include power management code if necessary

This patch slightly reduces the UFS driver size if built with power
management support disabled.

Link: https://lore.kernel.org/r/20210722033439.26550-4-bvanassche@acm.org
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Stanley Chu <stanley.chu@mediatek.com>
Cc: Can Guo <cang@codeaurora.org>
Cc: Asutosh Das <asutoshd@codeaurora.org>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Daejun Park <daejun7.park@samsung.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ufs/ufshcd.c

@@ -8805,6 +8805,7 @@ static void ufshcd_vreg_set_lpm(struct ufs_hba *hba)
 		usleep_range(5000, 5100);
 }
 
+#ifdef CONFIG_PM
 static int ufshcd_vreg_set_hpm(struct ufs_hba *hba)
 {
 	int ret = 0;
@@ -8832,6 +8833,7 @@ static int ufshcd_vreg_set_hpm(struct ufs_hba *hba)
 out:
 	return ret;
 }
+#endif /* CONFIG_PM */
 
 static void ufshcd_hba_vreg_set_lpm(struct ufs_hba *hba)
 {
@@ -9239,6 +9241,7 @@ static int ufshcd_suspend(struct ufs_hba *hba)
 	return ret;
 }
 
+#ifdef CONFIG_PM
 /**
  * ufshcd_resume - helper function for resume operations
  * @hba: per adapter instance
@@ -9276,7 +9279,9 @@ static int ufshcd_resume(struct ufs_hba *hba)
 		ufshcd_update_evt_hist(hba, UFS_EVT_RESUME_ERR, (u32)ret);
 	return ret;
 }
+#endif /* CONFIG_PM */
 
+#ifdef CONFIG_PM_SLEEP
 /**
  * ufshcd_system_suspend - system suspend callback
  * @dev: Device associated with the UFS controller.
@@ -9332,7 +9337,9 @@ int ufshcd_system_resume(struct device *dev)
 	return ret;
 }
 EXPORT_SYMBOL(ufshcd_system_resume);
+#endif /* CONFIG_PM_SLEEP */
 
+#ifdef CONFIG_PM
 /**
  * ufshcd_runtime_suspend - runtime suspend callback
  * @dev: Device associated with the UFS controller.
@@ -9380,6 +9387,7 @@ int ufshcd_runtime_resume(struct device *dev)
 	return ret;
 }
 EXPORT_SYMBOL(ufshcd_runtime_resume);
+#endif /* CONFIG_PM */
 
 /**
  * ufshcd_shutdown - shutdown routine

drivers/scsi/ufs/ufshcd.h

@@ -1030,10 +1030,14 @@ static inline u8 ufshcd_wb_get_query_index(struct ufs_hba *hba)
 	return 0;
 }
 
+#ifdef CONFIG_PM
 extern int ufshcd_runtime_suspend(struct device *dev);
 extern int ufshcd_runtime_resume(struct device *dev);
+#endif
+#ifdef CONFIG_PM_SLEEP
 extern int ufshcd_system_suspend(struct device *dev);
 extern int ufshcd_system_resume(struct device *dev);
+#endif
 extern int ufshcd_shutdown(struct ufs_hba *hba);
 extern int ufshcd_dme_configure_adapt(struct ufs_hba *hba,
 				      int agreed_gear,