mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-01-05 21:17:44 -05:00
Code Issues Packages Projects Releases Wiki Activity

scsi: ufs: ufs-mediatek: Support low-power mode for VCCQ

Browse Source 
Allow VCCQ to enter low-power mode, and also remove the restriction of VCC
because VCCQ/VCCQ2 can be changed to low-power mode even if VCC stays on
while the device is not in active power mode.

Link: https://lore.kernel.org/r/20220616053725.5681-7-stanley.chu@mediatek.com
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Peter Wang <peter.wang@mediatek.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:
Peter Wang
2022-06-16 13:37:20 +08:00
committed by Martin K. Petersen
parent 005ffdf09c
commit 0836cc252a
1 changed files with 13 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/ufs/host/ufs-mediatek.c
View File

@@ -1031,7 +1031,13 @@ static int ufs_mtk_link_set_lpm(struct ufs_hba *hba)
static void ufs_mtk_vreg_set_lpm(struct ufs_hba *hba, bool lpm)
{
if (!hba->vreg_info.vccq2 || !hba->vreg_info.vcc)
struct ufs_vreg *vccqx = NULL;
if (!hba->vreg_info.vccq && !hba->vreg_info.vccq2)
return;
/* Skip if VCC is assumed always-on */
if (!hba->vreg_info.vcc)
return;
/* Bypass LPM when device is still active */
@@ -1042,12 +1048,13 @@ static void ufs_mtk_vreg_set_lpm(struct ufs_hba *hba, bool lpm)
if (lpm && hba->vreg_info.vcc->enabled)
return;
if (lpm)
regulator_set_mode(hba->vreg_info.vccq2->reg,
REGULATOR_MODE_IDLE);
if (hba->vreg_info.vccq)
vccqx = hba->vreg_info.vccq;
else
regulator_set_mode(hba->vreg_info.vccq2->reg,
REGULATOR_MODE_NORMAL);
vccqx = hba->vreg_info.vccq2;
regulator_set_mode(vccqx->reg,
lpm ? REGULATOR_MODE_IDLE : REGULATOR_MODE_NORMAL);
}
static void ufs_mtk_auto_hibern8_disable(struct ufs_hba *hba)