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scsi: ufs: Allow regulators being always-on 

Introduce a flag "always_on" in struct ufs_vreg to allow vendors to keep
the regulator always-on.

Link: https://lore.kernel.org/r/20201207054955.24366-2-stanley.chu@mediatek.com
Reviewed-by: Andy Teng <andy.teng@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:
Stanley Chu 2020-12-07 13:49:54 +08:00 committed by Martin K. Petersen
parent 1918651f2d
commit f8162ac70e
2 changed files with 2 additions and 1 deletions
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1
drivers/scsi/ufs/ufs.h
View File

@ -512,6 +512,7 @@ struct ufs_query_res {
struct ufs_vreg { struct ufs_vreg {
struct regulator *reg; struct regulator *reg;
const char *name; const char *name;
bool always_on;
bool enabled; bool enabled;
int min_uV; int min_uV;
int max_uV; int max_uV;

2
drivers/scsi/ufs/ufshcd.c
View File

@ -8012,7 +8012,7 @@ static int ufshcd_disable_vreg(struct device *dev, struct ufs_vreg *vreg)
{ {
int ret = 0; int ret = 0;
if (!vreg || !vreg->enabled) if (!vreg || !vreg->enabled || vreg->always_on)
goto out; goto out;
ret = regulator_disable(vreg->reg); ret = regulator_disable(vreg->reg);