[PATCH v3 0/4] regulator: core: support shared enable GPIO

[Kim, Milo]

A Regulator can be enabled by external GPIO pin which is configurable in the
regulator_config.
At this moment, the GPIO can be owned by only one regulator device.
In some devices like LP8788 LDOs, multiple regulators are enabled by shared
one GPIO pin.
This patch-set enables shared enable GPIO concept and fix LP8788 LDO driver
as well.

Patches were generated based on 'for-next' of regulator.git
(git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git)

 Patch v3.
 a) Add a reference count, 'request_count' which makes sure only free the GPIO
    when it has no users
 b) Make return type of regulator_ena_gpio_ctrl()
 c) Free the GPIO when kzalloc() gets failed in regulator_ena_gpio_request()
 d) Add a pointer to the GPIO structure to the regulator_dev on setting the GPIO
    : use a GPIO structure directly instead of scanning the GPIO list

 Patch v2.
 a) Add a list for enable GPIO
 b) Add a reference count, 'enable_count' for actual pin control

 Patch v1.
 Initial patch

Milo(Woogyom) Kim (4):
  regulator: core: support shared enable GPIO concept
  regulator: core: manage enable GPIO list
  regulator: core: use regulator_ena_pin member
  regulator: lp8788-ldo: use ena_pin of regulator-core for external control

 drivers/regulator/core.c         |  142 +++++++++++++++++++++++++++++++++-----
 drivers/regulator/lp8788-ldo.c   |   98 +++++---------------------
 include/linux/regulator/driver.h |    4 +-
 3 files changed, 142 insertions(+), 102 deletions(-)

-- 
1.7.9.5


Best Regards,
Milo


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