[PATCH v3 0/3] Video: Keep fixed/gpio regulator counter in balance

[Svyatoslav Ryhel]

The commit 4fcba5d556b4 ("regulator: implement basic reference counter")
have made it more important to keep fixed/gpio regulators enable/disable
state in balance.

The regulator_set_enable_if_allowed function is more relaxed and will
wrap all cases where the regulator is busy, already active, missing or
if DM_REGULATOR is not enabled. 

These patches are an expansion of similar Jonas Karlman's patches.

---
Changes from v2:
- no changes, re-sending

Changes from v1:
- check return of regulator_set_enable_if_allowed for -ENOSYS
  to avoid error caused by disabled DM_REGULATOR (Jonas Karlman suggestion)
---

Svyatoslav Ryhel (3):
  video: pwm_backlight: use regulator_set_enable_if_allowed
  video: simple_panel: use regulator_set_enable_if_allowed
  video: tegra20: dsi: use regulator_set_enable_if_allowed

 drivers/video/pwm_backlight.c     | 13 ++++++-------
 drivers/video/simple_panel.c      | 10 +++++-----
 drivers/video/tegra20/tegra-dsi.c |  8 +++-----
 3 files changed, 14 insertions(+), 17 deletions(-)

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2.39.2