linux-kernel - [PATCH v1 1/2] scsi: ufs: export hibern8 entry and exit

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Message-Id: <70c5376129f902b6b3e9940ea3b10f147bf18a10.1632171047.git.nguyenb@codeaurora.org>
Date:   Mon, 20 Sep 2021 14:07:49 -0700
From:   "Bao D. Nguyen" <nguyenb@...eaurora.org>
To:     cang@...eaurora.org, asutoshd@...eaurora.org,
        martin.petersen@...cle.com, linux-scsi@...r.kernel.org
Cc:     linux-arm-msm@...r.kernel.org,
        "Bao D . Nguyen" <nguyenb@...eaurora.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        Bean Huo <beanhuo@...ron.com>,
        Stanley Chu <stanley.chu@...iatek.com>,
        Bart Van Assche <bvanassche@....org>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Keoseong Park <keosung.park@...sung.com>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v1 1/2] scsi: ufs: export hibern8 entry and exit

From: Asutosh Das <asutoshd@...eaurora.org>

Qualcomm controllers need to be in hibern8 before scaling up
or down the clocks. Hence, export the hibern8 entry and exit
functions.

Signed-off-by: Asutosh Das <asutoshd@...eaurora.org>
Signed-off-by: Bao D. Nguyen <nguyenb@...eaurora.org>
---
 drivers/scsi/ufs/ufshcd.c | 4 ++--
 drivers/scsi/ufs/ufshcd.h | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 3841ab49..f3aad32 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -227,7 +227,6 @@ static void ufshcd_hba_exit(struct ufs_hba *hba);
 static int ufshcd_clear_ua_wluns(struct ufs_hba *hba);
 static int ufshcd_probe_hba(struct ufs_hba *hba, bool async);
 static int ufshcd_setup_clocks(struct ufs_hba *hba, bool on);
-static int ufshcd_uic_hibern8_enter(struct ufs_hba *hba);
 static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba);
 static int ufshcd_host_reset_and_restore(struct ufs_hba *hba);
 static void ufshcd_resume_clkscaling(struct ufs_hba *hba);
@@ -4116,7 +4115,7 @@ int ufshcd_link_recovery(struct ufs_hba *hba)
 }
 EXPORT_SYMBOL_GPL(ufshcd_link_recovery);
 
-static int ufshcd_uic_hibern8_enter(struct ufs_hba *hba)
+int ufshcd_uic_hibern8_enter(struct ufs_hba *hba)
 {
 	int ret;
 	struct uic_command uic_cmd = {0};
@@ -4138,6 +4137,7 @@ static int ufshcd_uic_hibern8_enter(struct ufs_hba *hba)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(ufshcd_uic_hibern8_enter);
 
 int ufshcd_uic_hibern8_exit(struct ufs_hba *hba)
 {
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 52ea6f3..0cc55a2 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -1397,4 +1397,6 @@ static inline int ufshcd_rpmb_rpm_put(struct ufs_hba *hba)
 	return pm_runtime_put(&hba->sdev_rpmb->sdev_gendev);
 }
 
+int ufshcd_uic_hibern8_enter(struct ufs_hba *hba);
+int ufshcd_uic_hibern8_exit(struct ufs_hba *hba);
 #endif /* End of Header */
-- 
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