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From: "Bao D. Nguyen" <nguyenb@codeaurora.org>
To: cang@codeaurora.org, asutoshd@codeaurora.org,
	martin.petersen@oracle.com, linux-scsi@vger.kernel.org
Cc: linux-arm-msm@vger.kernel.org,
	"Bao D . Nguyen" <nguyenb@codeaurora.org>,
	Alim Akhtar <alim.akhtar@samsung.com>,
	Avri Altman <avri.altman@wdc.com>,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	Bean Huo <beanhuo@micron.com>,
	Stanley Chu <stanley.chu@mediatek.com>,
	Bart Van Assche <bvanassche@acm.org>,
	Jaegeuk Kim <jaegeuk@kernel.org>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Keoseong Park <keosung.park@samsung.com>,
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH v1 1/2] scsi: ufs: export hibern8 entry and exit
Date: Mon, 20 Sep 2021 14:07:49 -0700	[thread overview]
Message-ID: <70c5376129f902b6b3e9940ea3b10f147bf18a10.1632171047.git.nguyenb@codeaurora.org> (raw)
In-Reply-To: <cover.1632171047.git.nguyenb@codeaurora.org>
In-Reply-To: <cover.1632171047.git.nguyenb@codeaurora.org>

From: Asutosh Das <asutoshd@codeaurora.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@codeaurora.org>
Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.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 */
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


  reply	other threads:[~2021-09-20 21:10 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-20 21:07 [PATCH v1 0/2] Put Qualcomm's ufs controller to hibern8 during clock scaling Bao D. Nguyen
2021-09-20 21:07 ` Bao D. Nguyen [this message]
2021-09-28  5:39   ` [PATCH v1 1/2] scsi: ufs: export hibern8 entry and exit Alim Akhtar
2021-09-28 17:30     ` nguyenb
2021-09-20 21:07 ` [PATCH v1 2/2] scsi: ufs-qcom: enter and exit hibern8 during clock scaling Bao D. Nguyen
2021-09-28  6:03   ` Alim Akhtar
  -- strict thread matches above, loose matches on Subject: below --
2019-10-23  1:40 [PATCH v1 1/2] scsi: ufs: export hibern8 entry and exit Asutosh Das

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