diff options
| author | Bean Huo <beanhuo@micron.com> | 2023-12-13 01:08:25 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-12-14 07:16:12 +0300 |
| commit | 838f595a567257e3ac0ac33cdb6bb644ca326cc1 (patch) | |
| tree | b2b3a8d8b4e0fb149a901d9bf843ac2092221b5a /drivers/ufs/core/ufshcd.c | |
| parent | 6bf999e0eb41850d5c857102535d5c53b2ede224 (diff) | |
| download | linux-838f595a567257e3ac0ac33cdb6bb644ca326cc1.tar.xz | |
scsi: ufs: core: Add sysfs node for UFS RTC update
Introduce a sysfs node named 'rtc_update_ms' within the kernel, enabling
user to adjust the RTC periodic update frequency to suit the specific
requirements of the system and UFS. Also, this patch allows the user to
disable/enable periodic update RTC in the UFS idle time.
Signed-off-by: Bean Huo <beanhuo@micron.com>
Link: https://lore.kernel.org/r/20231212220825.85255-4-beanhuo@iokpp.de
Acked-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/ufs/core/ufshcd.c')
| -rw-r--r-- | drivers/ufs/core/ufshcd.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 99ad9b769048..5c4ef4b072c3 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -8233,9 +8233,9 @@ static void ufshcd_rtc_work(struct work_struct *work) if (!ufshcd_is_ufs_dev_busy(hba) && hba->ufshcd_state == UFSHCD_STATE_OPERATIONAL) ufshcd_update_rtc(hba); - if (ufshcd_is_ufs_dev_active(hba)) + if (ufshcd_is_ufs_dev_active(hba) && hba->dev_info.rtc_update_period) schedule_delayed_work(&hba->ufs_rtc_update_work, - msecs_to_jiffies(UFS_RTC_UPDATE_INTERVAL_MS)); + msecs_to_jiffies(hba->dev_info.rtc_update_period)); } static void ufs_init_rtc(struct ufs_hba *hba, u8 *desc_buf) @@ -8257,6 +8257,13 @@ static void ufs_init_rtc(struct ufs_hba *hba, u8 *desc_buf) dev_info->rtc_type = UFS_RTC_RELATIVE; dev_info->rtc_time_baseline = 0; } + + /* + * We ignore TIME_PERIOD defined in wPeriodicRTCUpdate because Spec does not clearly state + * how to calculate the specific update period for each time unit. And we disable periodic + * RTC update work, let user configure by sysfs node according to specific circumstance. + */ + dev_info->rtc_update_period = 0; } static int ufs_get_device_desc(struct ufs_hba *hba) |