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BACKPORT: scsi: ufs: export ufshcd_auto_hibern8_update for vendor usage

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

Bug: 149040610
Change-Id: Iaa95229f8741424aeaf691d12373a201aadb4446
(cherry picked from commit ba7af5ec5126dca17cdc8cfdb6740cdfb4bad70c)
[ Resolved minor conflict in drivers/scsi/ufshcd.c ]
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>
This commit is contained in:
Stanley Chu 2019-12-30 13:32:28 +08:00 • committed by Greg Kroah-Hartman
commit 4379ae3e6e
3 changed files with 19 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

20
drivers/scsi/ufs/ufs-sysfs.c
View file

@ -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)
{

18
drivers/scsi/ufs/ufshcd.c
View file

@ -4047,6 +4047,24 @@ int ufshcd_uic_hibern8_exit(struct ufs_hba *hba)
}
EXPORT_SYMBOL_GPL(ufshcd_uic_hibern8_exit);
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;

1
drivers/scsi/ufs/ufshcd.h
View file

@ -976,6 +976,7 @@ 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