Use devm helpers for regulator get and enable

NOTE: The series depends on commit
ee94aff2628b ("Devm helpers for regulator get and enable")
which currently sits in Mark's regulator/for-next

A few* drivers seem to pattern demonstrated by pseudocode:

- devm_regulator_get()
- regulator_enable()
- devm_add_action_or_reset(regulator_disable())

devm helpers for this pattern were added to remove bunch of code from
drivers. Typically following:

- replace 3 calls (devm_regulator_get[_optional](), regulator_enable(),
  devm_add_action_or_reset()) with just one
  (devm_regulator_get_enable[_optional]()).
- drop disable callback.

I believe this simplifies things by removing some dublicated code.

This series reowrks a few drivers. There is still plenty of fish in the
sea for people who like to improve the code (or count the beans ;]).

Finally - most of the converted drivers have not been tested (other than
compile-tested) due to lack of HW. All reviews and testing is _highly_
appreciated (as always!).

Revision history:

v3:
	- Drop already applied helper patches
	- Add a few more drivers

RFCv1 => v2:
	- Add devm_regulator_bulk_get_enable() and
	  devm_regulator_bulk_put()
	- Convert a couple of drivers to use the new
	  devm_regulator_bulk_get_enable().
	- Squash all IIO patches into one.

Patch 1:
	Add new devm-helper APIs to docs.
Patch 2:
	simplified CLK driver(s)
Patch 3:
	simplified GPU driver(s)
Patch 4 - 5:
	simplified hwmon driver(s)
Patch 6 - 14:
	simplified IIO driver(s)

---

Matti Vaittinen (14):
  docs: devres: regulator: Add new get_enable functions to devres.rst
  clk: cdce925: simplify using devm_regulator_get_enable()
  gpu: drm: simplify drivers using devm_regulator_*get_enable*()
  hwmon: lm90: simplify using devm_regulator_get_enable()
  hwmon: adm1177: simplify using devm_regulator_get_enable()
  iio: ad7192: Simplify using devm_regulator_get_enable()
  iio: ltc2688: Simplify using devm_regulator_*get_enable()
  iio: bmg160_core: Simplify using devm_regulator_*get_enable()
  iio: st_lsm6dsx: Simplify using devm_regulator_*get_enable()
  iio: ad7476: simplify using devm_regulator_get_enable()
  iio: ad7606: simplify using devm_regulator_get_enable()
  iio: max1241: simplify using devm_regulator_get_enable()
  iio: max1363: simplify using devm_regulator_get_enable()
  iio: hmc425a: simplify using devm_regulator_get_enable()

 .../driver-api/driver-model/devres.rst        |  4 +++
 drivers/clk/clk-cdce925.c                     | 21 +++----------
 drivers/gpu/drm/bridge/sii902x.c              | 22 ++------------
 drivers/gpu/drm/meson/meson_dw_hdmi.c         | 23 ++------------
 drivers/hwmon/adm1177.c                       | 27 ++---------------
 drivers/hwmon/lm90.c                          | 15 ++--------
 drivers/iio/adc/ad7192.c                      | 15 ++--------
 drivers/iio/adc/ad7476.c                      | 11 +------
 drivers/iio/adc/ad7606.c                      | 22 ++------------
 drivers/iio/adc/ad7606.h                      |  1 -
 drivers/iio/adc/max1241.c                     | 28 ++---------------
 drivers/iio/adc/max1363.c                     | 11 +------
 drivers/iio/amplifiers/hmc425a.c              | 17 +----------
 drivers/iio/dac/ltc2688.c                     | 23 ++------------
 drivers/iio/gyro/bmg160_core.c                | 24 ++-------------
 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h       |  2 --
 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c  | 30 ++++---------------
 17 files changed, 41 insertions(+), 255 deletions(-)

-- 
2.37.1


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]