Messages in this thread Patch in this message | | | From | Stanley Chu <> | Subject | [PATCH v3 05/10] scsi: ufs-mediatek: Prevent device regulators setting as LPM incorrectly | Date | Tue, 14 Jun 2022 22:16:50 +0800 |
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From: Po-Wen Kao <powen.kao@mediatek.com>
Device regulatrs are allowed to enter low-power mode if neither device is not in active mode, nor VCC does not keep on.
Simply fix this by adding conditions before LPM decision.
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Powen Kao <powen.kao@mediatek.com> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> --- drivers/ufs/host/ufs-mediatek.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c index 3b3fe5470b71..c9afe373437c 100755 --- 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); } -- 2.18.0
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