tree 387158383916196175054fa67f71d393507fe436
parent 878acffaf9b14eba75ee27b29f6170d22ac552c8
author Haojian Zhuang <haojian.zhuang@linaro.org> 1496199615 +0800
committer Haojian Zhuang <haojian.zhuang@linaro.org> 1496199638 +0800

drivers: add ufs stack

If UFS device is initialized, we could just make it out of
hibernation by UFS_FLAGS_SKIPINIT. And vendor's dirver is always
focus on PHY setting. We could use UFS driver directly if it
exits from hibernation.

There're eight LUNs in UFS device. The UFS driver only provides
the read/write API with LUN. User could define his own read/write
since user may want to access different LUNs.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>