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scsi: ufshcd: Allow zero value setting to Auto-Hibernate Timer

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The zero value Auto-Hibernate Timer is a valid setting, and it
indicates the Auto-Hibernate feature being disabled. Correctly
support this setting. In addition, when this value is queried
from sysfs, read from the host controller's register and return
that value instead of using the RAM value.

Change-Id: I6ad0e00ae485549cb18f704907149d8a69961e5f
Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.org>
This commit is contained in:
Bao D. Nguyen 2020-06-29 17:59:48 -07:00
commit f2c5d24c0a
3 changed files with 12 additions and 5 deletions
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9
drivers/scsi/ufs/ufs-sysfs.c
View file

@ -145,12 +145,19 @@ static u32 ufshcd_us_to_ahit(unsigned int timer)
static ssize_t auto_hibern8_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
u32 ahit;
struct ufs_hba *hba = dev_get_drvdata(dev);
if (!ufshcd_is_auto_hibern8_supported(hba))
return -EOPNOTSUPP;
return snprintf(buf, PAGE_SIZE, "%d\n", ufshcd_ahit_to_us(hba->ahit));
pm_runtime_get_sync(hba->dev);
ufshcd_hold(hba, false);
ahit = ufshcd_readl(hba, REG_AUTO_HIBERNATE_IDLE_TIMER);
ufshcd_release(hba);
pm_runtime_put_sync(hba->dev);
return scnprintf(buf, PAGE_SIZE, "%d\n", ufshcd_ahit_to_us(ahit));
}
static ssize_t auto_hibern8_store(struct device *dev,

4
drivers/scsi/ufs/ufshcd-qti.c
View file

@ -4851,8 +4851,8 @@ void ufshcd_auto_hibern8_enable(struct ufs_hba *hba)
{
unsigned long flags;
if (!ufshcd_is_auto_hibern8_supported(hba) || !hba->ahit
|| (hba->quirks & UFSHCD_QUIRK_BROKEN_AUTO_HIBERN8))
if (!ufshcd_is_auto_hibern8_supported(hba) ||
(hba->quirks & UFSHCD_QUIRK_BROKEN_AUTO_HIBERN8))
return;
spin_lock_irqsave(hba->host->host_lock, flags);

4
drivers/scsi/ufs/ufshcd.c
View file

@ -4147,8 +4147,8 @@ void ufshcd_auto_hibern8_enable(struct ufs_hba *hba)
{
unsigned long flags;
if (!ufshcd_is_auto_hibern8_supported(hba) || !hba->ahit
|| (hba->quirks & UFSHCD_QUIRK_BROKEN_AUTO_HIBERN8))
if (!ufshcd_is_auto_hibern8_supported(hba) ||
(hba->quirks & UFSHCD_QUIRK_BROKEN_AUTO_HIBERN8))
return;
spin_lock_irqsave(hba->host->host_lock, flags);