treewide: remove references to CREDITS ...

The CREDITS file was removed from barebox in 2015 by commit 6570288f2d97
("Remove the CREDITS file"). Remove references to it from several files.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

regulator: fixed: take regulator-boot-on into account ...

There are regulators which are turned on by default (hw-design) and
shouldn't be disabled during the boot. Upstream uses the
regulator-boot-on dt-property for it:

8<--------------------------------------------------
  regulator-boot-on:
    description: bootloader/firmware enabled regulator
    type: boolean
8<--------------------------------------------------

The difference between boot-on and always-on is the linux suspend
handling. Regulators marked as boot-on can be disabled during suspend.
This case isn't interesting for barebox so we can mark those as
always-on too.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

regulator: Convert drivers to use struct regulator_desc ...

To simplify porting kernel code, port a very basic struct
regulator_desc and convert all of the code to use it.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

regulator: fixed: Init gpio properly ...

gpio has to be initialized with an invalid gpio number. 0 is a valid
number and it will be requested and used by the driver.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

regulator: fixed: add always-on property ...

Support the "regulator-always-on" property for fixed regulators.
The regulator gets enabled on probe and subsequent disable calls are
ignored.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add initial regulator support ...

Provide minimal regulator support. Only supported operations are enabling
and disabling regulators. Association of devices with their regulators is
limited to devicetree only. If regulator support is disabled the API expands
to static inline stubs so consumers can still use the API.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>