scsi: ufs: export ufshcd_auto_hibern8_update for vendor usage

Export ufshcd_auto_hibern8_update to allow vendors to use common interface
to customize auto-hibernate timer.

Cc: Alim Akhtar <alim.akhtar@samsung.com>
Cc: Avri Altman <avri.altman@wdc.com>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Bean Huo <beanhuo@micron.com>
Cc: Can Guo <cang@codeaurora.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/1577683950-1702-5-git-send-email-stanley.chu@mediatek.com
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c
index ad2abc9..720be3f 100644 (file)
--- a/drivers/scsi/ufs/ufs-sysfs.c
+++ b/drivers/scsi/ufs/ufs-sysfs.c
@@ -118,26 +118,6 @@ static ssize_t spm_target_link_state_show(struct device *dev,
                                ufs_pm_lvl_states[hba->spm_lvl].link_state));
 }
 
-static void ufshcd_auto_hibern8_update(struct ufs_hba *hba, u32 ahit)
-{
-       unsigned long flags;
-
-       if (!ufshcd_is_auto_hibern8_supported(hba))
-               return;
-
-       spin_lock_irqsave(hba->host->host_lock, flags);
-       if (hba->ahit != ahit)
-               hba->ahit = ahit;
-       spin_unlock_irqrestore(hba->host->host_lock, flags);
-       if (!pm_runtime_suspended(hba->dev)) {
-               pm_runtime_get_sync(hba->dev);
-               ufshcd_hold(hba, false);
-               ufshcd_auto_hibern8_enable(hba);
-               ufshcd_release(hba);
-               pm_runtime_put(hba->dev);
-       }
-}
-
 /* Convert Auto-Hibernate Idle Timer register value to microseconds */
 static int ufshcd_ahit_to_us(u32 ahit)
 {

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index b01c58f..1b97f2d 100644 (file)
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -3892,6 +3892,24 @@ static int ufshcd_uic_hibern8_exit(struct ufs_hba *hba)
        return ret;
 }
 
+void ufshcd_auto_hibern8_update(struct ufs_hba *hba, u32 ahit)
+{
+       unsigned long flags;
+
+       if (!(hba->capabilities & MASK_AUTO_HIBERN8_SUPPORT))
+               return;
+
+       spin_lock_irqsave(hba->host->host_lock, flags);
+       if (hba->ahit == ahit)
+               goto out_unlock;
+       hba->ahit = ahit;
+       if (!pm_runtime_suspended(hba->dev))
+               ufshcd_writel(hba, hba->ahit, REG_AUTO_HIBERNATE_IDLE_TIMER);
+out_unlock:
+       spin_unlock_irqrestore(hba->host->host_lock, flags);
+}
+EXPORT_SYMBOL_GPL(ufshcd_auto_hibern8_update);
+
 void ufshcd_auto_hibern8_enable(struct ufs_hba *hba)
 {
        unsigned long flags;

diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index b536a26..e05cafd 100644 (file)
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -923,6 +923,7 @@ int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
        enum flag_idn idn, bool *flag_res);
 
 void ufshcd_auto_hibern8_enable(struct ufs_hba *hba);
+void ufshcd_auto_hibern8_update(struct ufs_hba *hba, u32 ahit);
 
 #define SD_ASCII_STD true
 #define SD_RAW false