[PATCH v5 0/3] Add power control for lm90

[Wei Ni <wni-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>]

The device lm90 can be controlled by the vcc rail.
Add function to power on/off the vcc.
I will update all .dts files referencing this driver to
match the new requirement in my next series.

This series is v5, previous version patches are:
[v4]: http://www.spinics.net/lists/lm-sensors/msg39583.html
[v3]: http://www.spinics.net/lists/lm-sensors/msg39503.html
[v2]: http://www.spinics.net/lists/arm-kernel/msg265373.html
[v1]: http://www.mail-archive.com/linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org/msg12034.html

Changes from v4:
1. set vcc-supply as required property.

Changes from v3:
1. change to use devm_regulator_get, as per discussion in previous patches.
2. just return errors when get error from regulator_get(), Mark's new dummy
regulator can cope with errors.
3. add vendor prefix for GMT
3. list manufacturer in the binding doc.

Changes from v2:
1. use devm_regulator_get_optional(), as suggested by Mark.
2. remove the lm90_power_control(), enable the regulator in the probe()
directly, so the codes are more clear, as suggested by Alexander and Guenter.
3. change the binding documentation, as per Stephen suggestion.
4. couple of changes, as per previous review.

Changes from v1:
1. if get regulator failed, we should continue to run probe function,
not return fail.
2. call regulator_put() in error handler and remove function.
3. add LM90 DT binding document.

Wei Ni (3):
  hwmon: (lm90) Add power control
  of: add vendor prefix for GMT
  Documentation: dt: hwmon: add OF document for LM90

 Documentation/devicetree/bindings/hwmon/lm90.txt   |   44 ++++++++++++++++++++
 .../devicetree/bindings/vendor-prefixes.txt        |    1 +
 drivers/hwmon/lm90.c                               |   19 +++++++++
 3 files changed, 64 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/lm90.txt

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1.7.9.5