diff options
| author | Po-Wen Kao <powen.kao@mediatek.com> | 2022-06-16 13:37:19 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-06-16 22:08:43 -0400 |
| commit | 005ffdf09cd3a3b96c071f5439e5ad389158e5a6 (patch) | |
| tree | 64a86ffdcdda5d9a9d381d7aa18239473e636713 /drivers/ufs | |
| parent | 3fd23b8dfb54d9b74eba6dfdd3225db3ac116785 (diff) | |
| download | linux-005ffdf09cd3a3b96c071f5439e5ad389158e5a6.tar.bz2 | |
scsi: ufs: ufs-mediatek: Prevent device regulators setting LPM incorrectly
Device regulatrs are allowed to enter low-power mode if neither device is
not in active mode, nor VCC does not keep on.
Fix this by adding conditions before LPM decision.
Link: https://lore.kernel.org/r/20220616053725.5681-6-stanley.chu@mediatek.com
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Po-Wen Kao <powen.kao@mediatek.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/ufs')
| -rw-r--r-- | drivers/ufs/host/ufs-mediatek.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c index 817d957512a3..03762ecaaaf8 100644 --- a/drivers/ufs/host/ufs-mediatek.c +++ b/drivers/ufs/host/ufs-mediatek.c @@ -1034,10 +1034,18 @@ static void ufs_mtk_vreg_set_lpm(struct ufs_hba *hba, bool lpm) if (!hba->vreg_info.vccq2 || !hba->vreg_info.vcc) return; - if (lpm && !hba->vreg_info.vcc->enabled) + /* Bypass LPM when device is still active */ + if (lpm && ufshcd_is_ufs_dev_active(hba)) + return; + + /* Bypass LPM if VCC is enabled */ + if (lpm && hba->vreg_info.vcc->enabled) + return; + + if (lpm) regulator_set_mode(hba->vreg_info.vccq2->reg, REGULATOR_MODE_IDLE); - else if (!lpm) + else regulator_set_mode(hba->vreg_info.vccq2->reg, REGULATOR_MODE_NORMAL); } |