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 v2 1/2] scsi: ufs: export hibern8 entry and exit
Date: Tue, 28 Sep 2021 02:06:12 -0700 [thread overview]
Message-ID: <a29bfdd0c8f1d1a3e5fb69e43ea277c97a7f0cb6.1632818942.git.nguyenb@codeaurora.org> (raw)
In-Reply-To: <cover.1632818942.git.nguyenb@codeaurora.org>
In-Reply-To: <cover.1632818942.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 | 1 +
2 files changed, 3 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..124f50b 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -1001,6 +1001,7 @@ int ufshcd_init(struct ufs_hba *, void __iomem *, unsigned int);
int ufshcd_link_recovery(struct ufs_hba *hba);
int ufshcd_make_hba_operational(struct ufs_hba *hba);
void ufshcd_remove(struct ufs_hba *);
+int ufshcd_uic_hibern8_enter(struct ufs_hba *hba);
int ufshcd_uic_hibern8_exit(struct ufs_hba *hba);
void ufshcd_delay_us(unsigned long us, unsigned long tolerance);
int ufshcd_wait_for_register(struct ufs_hba *hba, u32 reg, u32 mask,
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
next parent reply other threads:[~2021-09-28 9:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1632818942.git.nguyenb@codeaurora.org>
2021-09-28 9:06 ` Bao D. Nguyen [this message]
2021-09-28 22:28 ` [PATCH v2 1/2] scsi: ufs: export hibern8 entry and exit Bart Van Assche
2021-09-29 3:13 ` Alim Akhtar
2021-09-28 9:06 ` [PATCH v2 2/2] scsi: ufs-qcom: enter and exit hibern8 during clock scaling Bao D. Nguyen
2021-09-29 3:16 ` Alim Akhtar
2019-10-23 16:39 [PATCH v2 1/2] scsi: ufs: export hibern8 entry and exit Asutosh Das
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