diff options
| author | Sujit Reddy Thumma <sthumma@codeaurora.org> | 2014-09-25 15:32:22 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-10-01 13:11:19 +0200 |
| commit | aa497613093412ee26ef4bfa4ffec8391553dfca (patch) | |
| tree | 1287812030e74c5555c66d5f36b7981517d99538 /drivers/scsi/ufs/ufs.h | |
| parent | 5c0c28a84af9f9b6061bb4855a30e13d289b4ae1 (diff) | |
| download | linux-aa497613093412ee26ef4bfa4ffec8391553dfca.tar.bz2 | |
ufs: Add regulator enable support
UFS devices are powered by at most three external power supplies -
- VCC - The flash memory core power supply, 2.7V to 3.6V or 1.70V to 1.95V
- VCCQ - The controller and I/O power supply, 1.1V to 1.3V
- VCCQ2 - Secondary controller and/or I/O power supply, 1.65V to 1.95V
For some devices VCCQ or VCCQ2 are optional as they can be
generated using internal LDO inside the UFS device.
Add DT bindings for voltage regulators that can be controlled
from host driver.
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
Signed-off-by: Dolev Raviv <draviv@codeaurora.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/ufs/ufs.h')
| -rw-r--r-- | drivers/scsi/ufs/ufs.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h index fafcf5e354c6..729ce7d62d1e 100644 --- a/drivers/scsi/ufs/ufs.h +++ b/drivers/scsi/ufs/ufs.h @@ -362,4 +362,29 @@ struct ufs_query_res { struct utp_upiu_query upiu_res; }; +#define UFS_VREG_VCC_MIN_UV 2700000 /* uV */ +#define UFS_VREG_VCC_MAX_UV 3600000 /* uV */ +#define UFS_VREG_VCC_1P8_MIN_UV 1700000 /* uV */ +#define UFS_VREG_VCC_1P8_MAX_UV 1950000 /* uV */ +#define UFS_VREG_VCCQ_MIN_UV 1100000 /* uV */ +#define UFS_VREG_VCCQ_MAX_UV 1300000 /* uV */ +#define UFS_VREG_VCCQ2_MIN_UV 1650000 /* uV */ +#define UFS_VREG_VCCQ2_MAX_UV 1950000 /* uV */ + +struct ufs_vreg { + struct regulator *reg; + const char *name; + bool enabled; + int min_uV; + int max_uV; + int min_uA; + int max_uA; +}; + +struct ufs_vreg_info { + struct ufs_vreg *vcc; + struct ufs_vreg *vccq; + struct ufs_vreg *vccq2; +}; + #endif /* End of Header */ |