scsi: ufs: core: Add reinit_notify() callback

reinit_notify() callback can be used by the UFS controller drivers to
perform changes required for UFSHCD reinit that can happen during max gear
switch.

Tested-by: Andrew Halaney <ahalaney@redhat.com> # Qdrive3/sa8540p-ride
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/ufs/core/ufshcd-priv.h

@@ -223,6 +223,12 @@ static inline void ufshcd_vops_config_scaling_param(struct ufs_hba *hba,
 		hba->vops->config_scaling_param(hba, p, data);
 }
 
+static inline void ufshcd_vops_reinit_notify(struct ufs_hba *hba)
+{
+	if (hba->vops && hba->vops->reinit_notify)
+		hba->vops->reinit_notify(hba);
+}
+
 extern const struct ufs_pm_lvl_states ufs_pm_lvl_states[];
 
 /**

include/ufs/ufshcd.h

@@ -298,6 +298,7 @@ struct ufs_pwr_mode_info {
  * @config_scaling_param: called to configure clock scaling parameters
  * @program_key: program or evict an inline encryption key
  * @event_notify: called to notify important events
+ * @reinit_notify: called to notify reinit of UFSHCD during max gear switch
  */
 struct ufs_hba_variant_ops {
 	const char *name;
@@ -336,6 +337,7 @@ struct ufs_hba_variant_ops {
 			       const union ufs_crypto_cfg_entry *cfg, int slot);
 	void	(*event_notify)(struct ufs_hba *hba,
 				enum ufs_event_type evt, void *data);
+	void	(*reinit_notify)(struct ufs_hba *);
 };
 
 /* clock gating state  */