tree 1287812030e74c5555c66d5f36b7981517d99538
parent 5c0c28a84af9f9b6061bb4855a30e13d289b4ae1
author Sujit Reddy Thumma <sthumma@codeaurora.org> 1411648342 +0300
committer Christoph Hellwig <hch@lst.de> 1412161879 +0200

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>